EFJohnson Speaker 761X User Manual

Service Manual  
VHF 146-174 MHz  
45 Watts  
Part No. 242-7610-0xx  
761x (VHF)  
764x (UHF)  
UHF 400-430, 450-470, 470-490,  
Conventional Mobile  
490-512 MHz  
35 Watts  
Part No. 242-7640-0xx  
First Printing  
November 1998  
Download from Www.Somanuals.com. All Manuals Search And Download.  
TABLE OF CONTENTS  
Adjusting Squelch Level . . . . . . . . . . . . . . . . . . . 3-3  
1
GENERAL INFORMATION  
Bank Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4  
Automatic Scan Enable . . . . . . . . . . . . . . . . . . . . 3-4  
Backlight On-Off. . . . . . . . . . . . . . . . . . . . . . . . . 3-4  
Beep On-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4  
RECEIVING AND PLACING CALLS . . . . . . 3-4  
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4  
Receiving a Call . . . . . . . . . . . . . . . . . . . . . . . . . 3-4  
Placing a Call . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4  
Monitoring Before Transmitting . . . . . . . . . . . . . 3-4  
Time-Out Timer . . . . . . . . . . . . . . . . . . . . . . . . . 3-5  
PROGRAMMABLE FUNCTIONS . . . . . . . . . 3-5  
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5  
Backlight On-Off. . . . . . . . . . . . . . . . . . . . . . . . . 3-5  
Bank Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5  
Beep On-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5  
Call Guard Tone Select . . . . . . . . . . . . . . . . . . . . 3-6  
Channel Select. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6  
DTMF Number Select. . . . . . . . . . . . . . . . . . . . . 3-6  
Emergency Key. . . . . . . . . . . . . . . . . . . . . . . . . . 3-6  
Lock Key. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6  
Monitor Mode Select. . . . . . . . . . . . . . . . . . . . . . 3-6  
Output Power Select . . . . . . . . . . . . . . . . . . . . . . 3-6  
Priority Channel Select . . . . . . . . . . . . . . . . . . . . 3-6  
Receive Attenuate . . . . . . . . . . . . . . . . . . . . . . . . 3-6  
Scan Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6  
Scan List Programming. . . . . . . . . . . . . . . . . . . . 3-7  
Talk-Around Select . . . . . . . . . . . . . . . . . . . . . . . 3-7  
2-Tone Calling Features . . . . . . . . . . . . . . . . . . . 3-7  
5-Tone Calling Features . . . . . . . . . . . . . . . . . . . 3-7  
Wide/Narrow Band Select. . . . . . . . . . . . . . . . . . 3-7  
CHANNEL SCAN. . . . . . . . . . . . . . . . . . . . . . . 3-7  
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7  
Scan Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7  
Priority Channel Sampling . . . . . . . . . . . . . . . . . 3-8  
1.1  
1.2  
SCOPE OF MANUAL . . . . . . . . . . . . . . . . . . . .1-1  
TRANSCEIVER DESCRIPTION . . . . . . . . . . .1-1  
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1  
PRODUCT WARRANTY . . . . . . . . . . . . . . . . .1-1  
PART NUMBER BREAKDOWN. . . . . . . . . . .1-1  
TRANSCEIVER IDENTIFICATION. . . . . . . . .1-1  
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . .1-1  
FACTORY CUSTOMER SERVICE. . . . . . . . .1-1  
FACTORY RETURNS. . . . . . . . . . . . . . . . . . . .1-2  
REPLACEMENT PARTS . . . . . . . . . . . . . . . . .1-3  
3.4  
3.5  
1.3  
1.4  
1.5  
1.6  
1.7  
1.8  
1.9  
1.10 INTERNET HOME PAGE. . . . . . . . . . . . . . . . .1-3  
2
INSTALLATION AND DISASSEMBLY  
2.1  
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1  
Scope of Instructions. . . . . . . . . . . . . . . . . . . . . . 2-1  
Performance Tests. . . . . . . . . . . . . . . . . . . . . . . . 2-1  
Transceiver Programming. . . . . . . . . . . . . . . . . . 2-1  
Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1  
TRANSCEIVER INSTALLATION . . . . . . . . . .2-1  
Selecting Mounting Location . . . . . . . . . . . . . . . 2-1  
Installing Mounting Bracket . . . . . . . . . . . . . . . . 2-2  
Installing Microphone Hanger . . . . . . . . . . . . . . 2-2  
POWER CABLE INSTALLATION . . . . . . . . .2-2  
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2  
Cable Installation . . . . . . . . . . . . . . . . . . . . . . . . 2-2  
Power Cable Fuses . . . . . . . . . . . . . . . . . . . . . . . 2-3  
USING AN EXTERNAL SPEAKER . . . . . . . .2-3  
ACCESSORY CABLE INSTALLATION . . . .2-3  
TRANSCEIVER DISASSEMBLY . . . . . . . . . .2-4  
2-TONE/5-TONE MODULE  
2.2  
2.3  
2.4  
2.5  
2.6  
2.7  
3.6  
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . .2-5  
Installation Procedure . . . . . . . . . . . . . . . . . . . . . 2-5  
2-Tone Programming . . . . . . . . . . . . . . . . . . . . . 2-5  
5-Tone Programming . . . . . . . . . . . . . . . . . . . . . 2-5  
4
PROGRAMMING  
4.1  
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1  
Programming Setup. . . . . . . . . . . . . . . . . . . . . . . 4-1  
Programming Cables. . . . . . . . . . . . . . . . . . . . . . 4-1  
Programming Software . . . . . . . . . . . . . . . . . . . . 4-1  
STARTING THE PROGRAM . . . . . . . . . . . . . 4-2  
SPECIAL KEYS AND FUNCTIONS . . . . . . . 4-2  
MENU FLOW . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2  
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2  
File Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2  
Screen Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3  
Program Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3  
Print Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3  
Model Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3  
Setup menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4  
3
OPERATION  
3.1  
3.2  
FEATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1  
CONTROLS AND DISPLAY . . . . . . . . . . . . . .3-2  
Front Panel Controls . . . . . . . . . . . . . . . . . . . . . . 3-2  
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2  
Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2  
BASIC OPERATION . . . . . . . . . . . . . . . . . . . . .3-2  
Turning Power On and Off . . . . . . . . . . . . . . . . . 3-2  
Entering a Password . . . . . . . . . . . . . . . . . . . . . . 3-3  
Volume Level Adjustment . . . . . . . . . . . . . . . . . 3-3  
Power-On Menu . . . . . . . . . . . . . . . . . . . . . . . . . 3-3  
Channel Selection . . . . . . . . . . . . . . . . . . . . . . . . 3-3  
4.2  
4.3  
4.4  
3.3  
November 1998  
Part No. 001-7600-001  
ii  
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TABLE OF CONTENTS (CONT’D)  
4.5  
4.6  
UNIQUE PMR (EUROPEAN) SCREENS . .4-15  
6
ADJUSTMENT PROCEDURE  
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15  
Unique PMR Screens . . . . . . . . . . . . . . . . . . . . 4-15  
CLONING (PROGRAMMING ONE  
6.1  
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1  
Suggested Test Equipment . . . . . . . . . . . . . . . . . 6-1  
Test Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2  
Test Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2  
Computer-Aided Tuning. . . . . . . . . . . . . . . . . . . 6-3  
Reprogramming if EEPROM is Replaced or  
TRANSCEIVER WITH ANOTHER) . . . . .4-16  
5A VHF (7610) CIRCUIT DESCRIPTION  
Error Occurs . . . . . . . . . . . . . . . . . . . . . . . . . 6-4  
PRELIMINARY SETUP. . . . . . . . . . . . . . . . . . .6-4  
PLL ADJUSTMENT (VHF MODELS). . . . . . .6-4  
TRANSMITTER ADJUSTMENTS  
(VHF MODELS). . . . . . . . . . . . . . . . . . . . . . . .6-4  
Reference Frequency . . . . . . . . . . . . . . . . . . . . . 6-4  
Output Power Adjust. . . . . . . . . . . . . . . . . . . . . . 6-5  
FM Deviation Adjust . . . . . . . . . . . . . . . . . . . . . 6-5  
DTCS Waveform Adjust. . . . . . . . . . . . . . . . . . . 6-6  
RECEIVER ADJUSTMENTS  
(VHF MODELS) . . . . . . . . . . . . . . . . . . . . . . .6-6  
Bandpass Filter Adjust . . . . . . . . . . . . . . . . . . . . 6-6  
Squelch Adjust . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6  
Beep Tone Level. . . . . . . . . . . . . . . . . . . . . . . . . 6-7  
PLL ADJUSTMENT (UHF MODELS) . . . . . .6-8  
TRANSMITTER ADJUSTMENTS  
(UHF MODELS). . . . . . . . . . . . . . . . . . . . . . . .6-8  
Reference Frequency . . . . . . . . . . . . . . . . . . . . . 6-8  
Output Power Adjust. . . . . . . . . . . . . . . . . . . . . . 6-8  
FM Deviation Adjust . . . . . . . . . . . . . . . . . . . . . 6-8  
DTCS Waveform Adjust. . . . . . . . . . . . . . . . . . . 6-9  
RECEIVER ADJUSTMENTS  
5.1  
VHF RECEIVER CIRCUIT . . . . . . . . . . . . . . . .5-1  
Antenna Switching Circuit . . . . . . . . . . . . . . . . . 5-1  
RF Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1  
First Mixer And First IF Circuits . . . . . . . . . . . . 5-1  
Second IF and Demodulator Circuits . . . . . . . . . 5-1  
Audio Amplifier Circuit . . . . . . . . . . . . . . . . . . . 5-2  
Receiver Mute Circuit . . . . . . . . . . . . . . . . . . . . 5-2  
VHF TRANSMITTER CIRCUIT. . . . . . . . . . . .5-3  
Microphone Amplifier Circuit . . . . . . . . . . . . . . 5-3  
Modulation Circuit . . . . . . . . . . . . . . . . . . . . . . . 5-3  
Transmit Driver Circuit . . . . . . . . . . . . . . . . . . . 5-3  
Power Amplifier Module . . . . . . . . . . . . . . . . . . 5-3  
APC Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4  
VHF PLL CIRCUIT . . . . . . . . . . . . . . . . . . . . . .5-4  
PLL Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4  
VCO Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5  
VHF IC PIN DESCRIPTIONS . . . . . . . . . . . . .5-5  
VHF Power Supply. . . . . . . . . . . . . . . . . . . . . . . 5-5  
VHF CPU IC1 Port Allocation. . . . . . . . . . . . . . 5-5  
VHF I/O Expander IC5 (Main Unit) . . . . . . . . . 5-6  
VHF Port Expander IC11 (Main Unit). . . . . . . . 5-6  
6.2  
6.3  
6.4  
5.2  
6.5  
5.3  
5.4  
6.6  
6.7  
6.8  
(UHF MODELS). . . . . . . . . . . . . . . . . . . . . . .6-10  
Bandpass Filter Adjust . . . . . . . . . . . . . . . . . . . 6-10  
Squelch Adjust . . . . . . . . . . . . . . . . . . . . . . . . . 6-10  
Beep Tone Level. . . . . . . . . . . . . . . . . . . . . . . . 6-10  
5B UHF (7640) CIRCUIT DESCRIPTION  
5.5  
UHF RECEIVER CIRCUIT. . . . . . . . . . . . . . . .5-7  
Antenna Switching Circuit . . . . . . . . . . . . . . . . . 5-7  
RF Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7  
First Mixer And First IF Circuits . . . . . . . . . . . . 5-7  
Second IF and Demodulator Circuits . . . . . . . . . 5-7  
Audio Amplifier Circuit . . . . . . . . . . . . . . . . . . . 5-8  
Receiver Mute Circuit . . . . . . . . . . . . . . . . . . . . 5-8  
UHF TRANSMITTER CIRCUIT. . . . . . . . . . . .5-9  
Microphone Amplifier Circuit . . . . . . . . . . . . . . 5-9  
Modulation Circuit . . . . . . . . . . . . . . . . . . . . . . . 5-9  
Transmit Driver Circuit . . . . . . . . . . . . . . . . . . . 5-9  
Power Amplifier Module . . . . . . . . . . . . . . . . . . 5-9  
APC Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10  
UHF PLL CIRCUIT . . . . . . . . . . . . . . . . . . . . .5-10  
PLL Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10  
VCO Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11  
UHF Power Supply. . . . . . . . . . . . . . . . . . . . . . 5-11  
UHF CPU IC1 Port Allocation. . . . . . . . . . . . . 5-11  
UHF I/O Expander IC12 (Main Unit) . . . . . . . 5-12  
UHF Port Expander IC13 (Main Unit). . . . . . . 5-12  
7
PARTS LIST  
5.6  
5.7  
VHF (761x) Models  
Main Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1  
Front Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-18  
Chassis Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-20  
Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . .7-21  
UHF (764x) Models  
Main Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-8  
Front Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-18  
Chassis Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-20  
Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . .7-22  
November 1998  
iii  
Part No. 001-7600-001  
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TABLE OF CONTENTS (CONT’D)  
8
SCHEMATIC DIAGRAMS AND  
LIST OF FIGURES  
COMPONENT LAYOUTS  
2-1  
2-2  
2-3  
2-4  
2-5  
2-6  
2-7  
3-1  
4-1  
4-2  
5-1  
5-2  
5-3  
5-4  
5-5  
5-6  
6-1  
6-2  
6-3  
6-4  
6-5  
6-6  
Installation Components . . . . . . . . . . . . . . . . . . 2-1  
Mounting Bracket Installation. . . . . . . . . . . . . . 2-2  
Accessory Cable Installation. . . . . . . . . . . . . . . 2-3  
Cover and Front Panel Removal . . . . . . . . . . . . 2-4  
PC Board Screws. . . . . . . . . . . . . . . . . . . . . . . . 2-4  
Removing PC Board . . . . . . . . . . . . . . . . . . . . . 2-4  
2/5-Tone Module Installation . . . . . . . . . . . . . . 2-5  
7600 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . 3-1  
Programming Setup. . . . . . . . . . . . . . . . . . . . . . 4-1  
Memory Channel Screen (PMR Models) . . . . 4-17  
Second IF System IC3 (VHF) . . . . . . . . . . . . . . 5-2  
Audio Switching and Amplifier Circuit (VHF) 5-2  
PLL Circuit (VHF) . . . . . . . . . . . . . . . . . . . . . . 5-4  
Second IF System IC1 (UHF) . . . . . . . . . . . . . . 5-8  
Audio Switching and Amplifier Circuit (UHF) 5-8  
PLL Circuit (UHF) . . . . . . . . . . . . . . . . . . . . . 5-10  
Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1  
Screen Display Example . . . . . . . . . . . . . . . . . . 6-2  
Test Cable Schematic . . . . . . . . . . . . . . . . . . . . 6-2  
VHF Adjustment Points . . . . . . . . . . . . . . . . . . 6-5  
Beep Tone Level Adjustment . . . . . . . . . . . . . . 6-7  
UHF Adjustment Points . . . . . . . . . . . . . . . . . . 6-9  
VHF (761x) Models  
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1  
Transistor and Diode Basing. . . . . . . . . . . . . . . . .8-2  
Main Unit Board Bottom View. . . . . . . . . . . . . . .8-3  
Main Unit Board, Top View . . . . . . . . . . . . . . . . .8-4  
Main Unit Schematic . . . . . . . . . . . . . . . . . . . . . .8-5  
Front Unit PC Board. . . . . . . . . . . . . . . . . . . . . .8-10  
Front Unit Schematic . . . . . . . . . . . . . . . . . . . . .8-11  
UHF (764x) Models  
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . .8-6  
Transistor and Diode Basing. . . . . . . . . . . . . . . .8-12  
Main Unit Board Bottom View. . . . . . . . . . . . . . .8-7  
Main Unit Board, Top View . . . . . . . . . . . . . . . . .8-8  
Main Unit Schematic . . . . . . . . . . . . . . . . . . . . . .8-9  
Front Unit PC Board. . . . . . . . . . . . . . . . . . . . . .8-10  
Front Unit Schematic . . . . . . . . . . . . . . . . . . . . .8-11  
LIST OF TABLES  
1-1  
3-1  
4-1  
75xx Accessories . . . . . . . . . . . . . . . . . . . . . . . .1-2  
Option Key Programmable Functions . . . . . . . .3-5  
Memory Channel Screen Description  
(LMR Models) . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4  
Key and Display Assign Screen Description . . .4-7  
DTMF Autodial Screen Description . . . . . . . . . .4-9  
Continuous Tone Screen Description . . . . . . . .4-10  
Scan Function Screen Description . . . . . . . . . .4-10  
2-Tone Code Channel Screen Description . . . .4-11  
Common Screen Description . . . . . . . . . . . . . .4-13  
Expert Screen Description . . . . . . . . . . . . . . . .4-14  
VHF Test Frequencies . . . . . . . . . . . . . . . . . . . . .6-3  
UHF Test Frequencies . . . . . . . . . . . . . . . . . . . . .6-3  
4-2  
4-3  
4-4  
4-5  
4-6  
4-7  
4-8  
6-1  
6-2  
November 1998  
Part No. 001-7600-001  
iv  
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GENERAL INFORMATION  
SECTION 1 GENERAL INFORMATION  
1.1 SCOPE OF MANUAL  
1.4 PART NUMBER BREAKDOWN  
This service manual contains operation, installa-  
tion, programming, alignment, and service information  
for the EFJohnson® 7610 and 7640 mobile transceiv-  
ers.  
The following is a breakdown of the part number  
used to identify this transceiver.  
242 - 7 6 x x - 0 x x  
Config.  
Band  
1.2 TRANSCEIVER DESCRIPTION  
2 = Std mic  
3 = With DTMF  
1 = VHF  
4 = UHF  
1.2.1 GENERAL  
mic  
7 = w/o mic  
Type  
The 7600-series mobile transceivers operate on  
conventional (non-trunked) channels. The 7610 oper-  
ates in the VHF frequency range of 146-174 MHz, and  
the 7640 operates in the UHF frequency range of  
400-430, 450-470, 470-490, or 488-512 MHz. Up to  
32 channels can be programmed. Power output is user  
selectable or fixed for the following levels. Refer to  
Section 3.1 for more information on features.  
Freq Range  
0 = Half duplex, dual  
0 = Full band  
IF, high power  
1 = 400-430 (UHF)  
3 = 146-174 (VHF)  
450-470 (UHF)  
4 = 470-490 (UHF)  
5 = 488-512 (UHF)  
Signaling  
0 = Conventional only  
NOTE: Not all configurations  
are available.  
Model  
High  
Low 1 Low 2  
1.5 TRANSCEIVER IDENTIFICATION  
7610 (VHF)  
7640 (UHF)  
45W  
35W  
25W  
20W  
4.5W  
3.5W  
The transceiver identification number is printed  
on a label that is attached to the chassis. The following  
information is contained in the identification number:  
These transceivers are digitally synthesized and  
microprocessor controlled. Transceiver programming  
is performed using a PC-compatible computer, a spe-  
cial EFJohnson programming cable, and program-  
ming software (see Table 1-1). The alignment proce-  
dure is performed using this same hardware setup, a  
fabricated test cable, and special Adjust software  
included with the programming software (see  
Model  
Revision Manufacture  
Warranty  
From P.N.  
Letter  
Plant Number  
Date  
76xx  
0
A
23 8  
J
12345  
J = Japan  
Last Digit of Year  
8th Digit  
of P.N.  
Week No.  
of Year  
1.6 ACCESSORIES  
1.3 PRODUCT WARRANTY  
The accessories available for this transceiver are  
listed in Table 1-1.  
The warranty statement for this transceiver is  
available from your product supplier or from the War-  
ranty Department, EFJohnson, 299 Johnson Avenue,  
P.O. Box 1249, Waseca, MN 56093-0514. This infor-  
mation may also be requested from the Warranty  
Department by phone as described in Section 1.7. The  
Warranty Department may also be contacted for War-  
ranty Service Reports, claim forms, or any other ques-  
tions concerning warranties or warranty service.  
1.7 FACTORY CUSTOMER SERVICE  
The Customer Service Department of EFJohnson  
provides customer assistance on technical problems  
and the availability of local and factory repair facili-  
ties. Regular Customer Service hours are 7:30 AM. -  
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GENERAL INFORMATION  
Table 1-1 75xx Accessories  
Accessory Part No.  
Mounting bracket  
5:30 PM. Central Time, Monday - Friday. The  
Customer Service Department can be reached using  
one of the following telephone numbers:  
585-7600-040  
585-7600-029  
585-7600-041  
023-3514-001  
023-7171-911  
585-7600-042  
DC cable assembly  
Toll-Free: (800) 328-3911  
(From within continental United States only)  
Mounting screws and fuses  
Microphone hanger  
International: (507) 835-6911  
FAX: (507) 835-6969  
Mic hanger ground wire  
Function name stickers  
Microphone, standard  
Microphone, DTMF  
585-7600-020  
585-7600-022  
E-Mail: First Initial/Last [email protected]  
(You need to know the name of the person you want to  
reach. Example: [email protected])  
2-Tone/5-tone module kit  
585-7600-026  
250-0151-010  
585-7600-023  
585-7600-027  
5”, 4.7-ohm, 15W external speaker  
Compact speaker  
NOTE: Emergency 24-hour technical support is also  
available at the 800 and preceding numbers during off  
hours, holidays, and weekends.  
Accessory/data cable (DB-9 connector)  
When your call is answered at EFJohnson, you  
will hear a brief message informing you of numbers  
that can be entered to reach various departments. This  
number may be entered during or after the message  
using a tone-type telephone. If you have a pulse-type  
telephone, wait until the message is finished and an  
operator will come on the line to assist you. When you  
enter some numbers, another number is requested to  
further categorize the type of information you need.  
Programming Accessories  
Programming software, 3-1/2 disk  
585-7600-030  
Programming cable, computer-adapter 585-7500-031  
Adapter cable, prog cable-xcvr  
Replication (cloning) cable  
DB-9 M to DB-25 F adapter  
585-7600-031  
597-2002-200  
515-9000-015  
to the problem so that return of the equipment would  
not be necessary.  
You may also contact the Customer Service  
Department by mail. Please include all information  
that may be helpful in solving your problem. The mail-  
ing address is as follows:  
Be sure to fill out a Factory Repair Request Form  
#271 for each unit to be repaired, whether it is in or  
out of warranty. These forms are available free of  
charge by calling Customer Service (see Section 1.7)  
or by requesting them when you send a unit in for  
repair. Clearly describe the difficulty experienced in  
the space provided and also note any prior physical  
damage to the equipment. Then include a form in the  
shipping container with each unit. Your telephone  
number and contact name are important because there  
are times when the technicians have specific questions  
that need to be answered in order to completely iden-  
tify and repair a problem.  
EFJohnson  
Customer Service Department  
299 Johnson Avenue  
P.O. Box 1249  
Waseca, MN 56093-0514  
1.8 FACTORY RETURNS  
Repair service is normally available through local  
authorized EFJohnson Land Mobile Radio Service  
Centers. If local service is not available, the equipment  
can be returned to the factory for repair. However, it is  
recommended that you contact the Customer Service  
Department before returning equipment because a ser-  
vice representative may be able to suggest a solution  
When returning equipment for repair, it is also a  
good idea to use a PO number or some other reference  
number on your paperwork in case you need to call the  
repair lab about your unit. These numbers are refer-  
enced on the repair order and it makes it easier and  
faster to locate your unit in the lab.  
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GENERAL INFORMATION  
Return Authorization (RA) numbers are not nec-  
essary unless you have been given one by the Field  
Service Department. RA numbers are required for  
exchange units or if the Field Service Department  
wants to be aware of a specific problem. If you have  
been given an RA number, reference this number on  
the Factory Repair Request Form sent with the unit.  
The repair lab will then contact the Field Service  
Department when the unit arrives.  
nator (C512, for example) and the model number of  
the equipment the part is from.  
You may also send your order by mail or FAX.  
The mailing address is as follows and the FAX number  
is shown in Section 1.7.  
EFJohnson  
Service Parts Department  
299 Johnson Avenue  
P.O. Box 1249  
1.9 REPLACEMENT PARTS  
Waseca, MN 56093-0514  
Replacement parts can be ordered directly from  
the Service Parts Department. To order parts by phone,  
dial the toll-free number as described in  
1.10 INTERNET HOME PAGE  
Section 1.7. When ordering, please supply the part  
number and quantity of each part ordered. EFJohnson  
dealers also need to give their account number. If there  
is uncertainty about the part number, include the desig-  
EFJohnson has a site on the World Wide Web that  
can be accessed for information on the company and  
such things as products, systems, and regulations. The  
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GENERAL INFORMATION  
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GENERAL INFORMATION  
7610 (VHF) AND 7640 (UHF) MOBILE SPECIFICATIONS  
The following are general specifications intended for use in testing and servicing this transceiver. For current  
advertised specifications, refer to the specification sheet available from your sales representative. Values are  
typical and are subject to change without notice.  
GENERAL  
Frequency Range  
VHF: 146-174 MHz  
UHF: 400-430 MHz, 450-470 MHz, 470-490 MHz, or 488-512 MHz (some  
performance degradation from 488-490 MHz with 488-512 MHz models)  
Conventional (non-trunked), Tone and digital Call Guard® squelch  
32 maximum (2 banks x 16 channels available)  
Operating Modes  
Channels  
Transmit/Receive Separation  
Any frequency within the range  
Channel Spacing (dual IF Models) VHF - 12.5 kHz (narrow band) and 30 kHz (wideband)  
UHF - 12.5 kHz (narrow band) and 25 kHz (wideband)  
Maximum Deviation  
12.5/15 kHz channel spacing - 2.5 kHz maximum  
25 kHz channel spacing - 5.0 kHz maximum  
5.0 PPM (VHF), 2.5 PPM (UHF) from –22° to +140° F (–30° to +60° C)  
1.6” H x 5.5” W x 6.7” D (4.1 cm x 13.9 cm x 17.0 cm)  
2 lb. 11 oz. (1.22 kg)  
Frequency Stability  
Dimensions (w/o controls)  
Weight  
Supply Voltage  
Current Drain (maximum)  
13.6 volts DC nominal (12-volt, negative ground vehicle electrical system)  
Standby - 200 mA standby  
Receive (rated audio out) - 700 mA  
Medium Tx Power - 6.0 A (VHF), 7.0 A (UHF)  
High Tx Power - 15 A max/10 A typ (VHF), 11 A max/8 A typ (UHF)  
Parts 15 and 90  
FCC Compliance  
RECEIVER  
Sensitivity (12 dB SINAD)  
Selectivity  
Spurious and Image Rejection  
Intermodulation  
0.25 µV  
70 dB at 25 kHz, 60 dB at 12.5 kHz  
70 dB  
65 dB  
Hum and Noise  
46 dB at 25 kHz, 40 dB at 12.5 kHz  
Any spread within the range  
3.5 W into 4-ohm load  
Less than 10% at 1 kHz with 60% deviation  
+2, –8 dB at 6 dB per octave de-emphasis  
50 ohms  
Maximum Frequency Spread  
Audio Power Output  
Audio Distortion  
Audio Response  
RF Input Impedance  
TRANSMITTER  
RF Power Output  
VHF: 45W (high), 25W (low 1), 4.5W (low 2)  
UHF: 35W (high), 20W (low 1), 3.5W (low 2)  
Spurious and Harmonic Emissions 70 dB  
FM Hum and Noise  
Audio Modulation  
Audio Distortion  
Audio Frequency Response  
Maximum Frequency Spread  
RF Output Impedance  
Duty Cycle  
46 dB at 25 kHz, 40 dB at 12.5 kHz  
12.5 kHz - 11K0F3E, 25 kHz - 16K0F3E  
Less than 5% at 1 kHz with 40% modulation  
+2, –8 dB at 6 dB per octave pre-emphasis  
Any spread within the band  
50 ohms  
20% TIA  
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GENERAL INFORMATION  
NOTES  
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INSTALLATION AND DISASSEMBLY  
SECTION 2 INSTALLATION AND DISASSEMBLY  
Optional Accessory Cable  
P.N. 585-7600-027  
External Spkr Jack  
UHF-Type  
Ant Jack  
DB-9 Female  
Red (+)  
10-Ft. Power Cable  
Black (–)  
Optional External Speaker  
P.N. 250-0151-010  
20A Fuses  
Figure 2-1 Installation Components  
2.1 GENERAL  
factory test channels and other test parameters when  
they are shipped. The included labels should be  
attached to the option keys to indicate the function.  
2.1.1 SCOPE OF INSTRUCTIONS  
Since each installation is somewhat unique, the  
following installation instructions are intended only as  
a general guide to installing this transceiver.  
2.1.4 POWER SOURCE  
This transceiver must be connected to a nominal  
12 VDC, negative ground vehicle electrical system  
(negative battery terminal connected directly to the  
chassis). If the vehicle has some other type of electri-  
cal system, a suitable voltage converter is required.  
2.1.2 PERFORMANCE TESTS  
Although each transceiver is carefully tested at  
the factory before shipment, it is good practice to ver-  
ify proper operation before it is placed in service.  
Important checks are receiver sensitivity and transmit-  
ter frequency, deviation, and power output.  
2.2 TRANSCEIVER INSTALLATION  
2.2.1 SELECTING MOUNTING LOCATION  
2.1.3 TRANSCEIVER PROGRAMMING  
This transceiver is designed for mounting in a  
location within convenient reach of the operator such  
as the dash, console, or floor. Since the mounting loca-  
tion can affect safe operation of the vehicle, observe  
the following precautions:  
The transceiver needs to be programmed before it  
is placed in service. Programming instructions are  
located in Section 4. Transceivers normally contain  
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INSTALLATION AND DISASSEMBLY  
Figure 2-2 Mounting Bracket Installation  
2.2.3 INSTALLING MICROPHONE HANGER  
WARNING  
Do not mount the transceiver where it may inter-  
Install the included microphone hanger in a con-  
venient location. For proper operation of functions  
such as monitoring and scanning, the hanger may need  
to be connected to chassis ground. If required, ground  
the hanger using the included grounding wire.  
fere with the operation of vehicle controls.  
Do not mount the transceiver where the user can-  
not easily reach the controls and view the  
display.  
Do not mount the transceiver where it may cause  
additional injury in case of an accident.  
2.3 POWER CABLE INSTALLATION  
Air bags inflate with great force. Therefore, do  
not mount this transceiver in the deployment  
area of an air bag. In addition, do not place other  
objects in the deployment area or other locations  
where they could unintentionally move into the  
deployment area.  
2.3.1 GENERAL  
It is recommended that both wires of the power  
cable be connected directly to the vehicle battery. Con-  
nection of either wire to other points may result in  
increased interference from the vehicle’s electrical  
system. If noise is still a problem, try installing a noise  
filter.  
2.2.2 INSTALLING MOUNTING BRACKET  
Check the area behind the intended mounting  
location for wiring, brake and gas lines, or other com-  
ponents that could be damaged when the mounting  
screws are installed. Then install the bracket and trans-  
ceiver as shown in Figure 2-2. Both standard and self-  
tapping screws are included for installing the bracket.  
2.3.2 CABLE INSTALLATION  
1. Before starting power cable installation, it is good  
practice to remove the negative cable from the bat-  
tery to prevent damage from accidental short  
circuits.  
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INSTALLATION AND DISASSEMBLY  
2. Route the red and black wires from the transceiver  
to the battery. Connect the red wire to the positive  
(+) terminal and the black wire to the negative (–)  
terminal.  
input that can be used to control the backlight (see  
Section 3.3.9). This cable is installed as shown in  
This cable has a standard DB-9 female connector  
for interfacing to external equipment. The pin number-  
ing and functions are as follows:  
3. Plug the cable into the pigtail coming from the trans-  
ceiver and reconnect the negative battery cable.  
4. Install the antenna according to the manufacturer’s  
instructions. The transceiver has a standard UHF  
connector. Check VSWR. Reflected power should  
be less than 4% of forward power (VSWR less than  
1.5 to 1).  
DB-9 Female Connector  
Outside View  
DB-9 Pin  
Function  
LCD backlight control in  
2.3.3 POWER CABLE FUSES  
1
2
3
4
5
6
7
8
9
Each power cable wire is protected by a 20-  
ampere fuse. These fuses are inspected and changed as  
shown below. If a fuse blows, locate the cause if possi-  
ble and replace it with one of the same rating.  
AF out  
Detected AF out  
Modulation in  
PTT control in  
Horn drive control out  
AF ground  
Detected AF ground  
Modulation ground  
Changing 20-Ampere Power Cable Fuses  
2.4 USING AN EXTERNAL SPEAKER  
An external speaker can be plugged into the  
external speaker jack on the back of the transceiver.  
This speaker should have an impedance of 4-8 ohms  
and a power handling capability of at least 3.5 watts.  
The internal speaker is automatically disabled when a  
speaker is plugged into this jack. The external speaker  
jack is a standard 1/8-inch, two-conductor phone jack.  
2.5 ACCESSORY CABLE INSTALLATION  
Optional Accessory Cable, Part No. 585-7600-  
027, can be used for connecting accessories such a  
horn alert or modem to the transceiver. It also has an  
Figure 2-3 Accessory Cable Installation  
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INSTALLATION AND DISASSEMBLY  
2.6 TRANSCEIVER DISASSEMBLY  
Removing Bottom Cover and Front Panel  
1. Remove the bottom cover by removing four screws  
(A) as shown in Figure 2-4.  
2. Remove the front panel by removing two screws  
(B).  
Figure 2-5 PC Board Screws  
Figure 2-4 Cover and Front Panel Removal  
Removing PC Board  
3. Remove ten screws (C) and two clips (D) as shown  
4. Remove shield (E).  
Figure 2-6 Removing PC Board  
5. Unsolder the antenna connector at three points (F).  
6. Lift the front of the PC board assembly as shown in  
Figure 2-6 and pull it out.  
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INSTALLATION AND DISASSEMBLY  
2.7 2-TONE/5-TONE MODULE INSTALLATION  
2.7.1 INSTALLATION PROCEDURE  
Screen Menu - Select “Key & Display Assign” and  
program an option key or the microphone hanger  
for the monitor function so that the decoder can  
be re-activated when the call is complete (see  
1. Turn power off and disconnect the power cable.  
2. Remove the bottom cover by removing the four  
screws (A) shown in Figure 2-5.  
2.7.3 5-TONE PROGRAMMING  
Program the transceiver for operation with a five-  
tone module as described in Section 4. Screens that  
need to be programmed with five-tone decoder infor-  
mation are as follows. Refer to on-line help for infor-  
mation on parameters in these screens (press F1 with  
parameter selected).  
3. Install the module as shown in Figure 2-7. The  
included foam pad is not used with this transceiver.  
Model Menu - “PMR” must be selected (see  
Select the following in the Screen Menu:  
“Rx Code CH” and program the information in  
the screen (see Section 4.5.2).  
“Tx Code CH” and program the information in  
the screen (see Section 4.5.2).  
Figure 2-7 2/5-Tone Module Installation  
“User Tone” and program the information in the  
screen (see Section 4.5.2).  
2.7.2 2-TONE PROGRAMMING  
“Memory CH” and program the parameters in  
this screen that are related to 5-tone operation on  
the channel (see Figure 4-2).  
Program the transceiver for operation with a two-  
tone decoder as described in Section 4. Screens that  
need to be programmed with two-tone decoder infor-  
mation are as follows. Refer to on-line help for more  
information on parameters in these screens (press F1  
with parameter selected).  
NOTE: If performing the deviation adjustment in  
the next section, the long tone must be turned on in  
RPT/STN/ID on the Memory Channel screen.  
Model Menu - “LMR” must be selected (see  
“Key & Display Assign” and program Tx Code  
and Call switches for use in transmitting 5-tone  
codes.  
Screen Menu - Select “2Tone Code CH” and  
program the information in the screen (see  
Setting 5-Tone Deviation  
The only adjustment on the 2/5-tone module is a  
potentiometer for setting the transmit tone deviation  
for 5-tone operation. This control is factory preset and  
should not require readjustment in the field. However,  
if adjustment is required, proceed as follows:  
Screen Menu - Select “Memory Channel” and pro-  
gram the information under “2Tone Dec” for  
each channel on which the decoder will be used  
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INSTALLATION AND DISASSEMBLY  
1. Monitor the transmit signal with a communications  
monitor. Set it for HPF = Off, LPF = 20 kHz, De-  
emphasis = Off, and Level = (P-P)/2.  
4. Check channels on each end of the operating band to  
make sure deviation is within the following  
limits. If not, repeat preceding adjustment.  
2. Select a channel near the center of the band and turn  
a long tone on (see preceding “NOTE”) by pressing  
the appropriate front panel key.  
25 kHz Channel Spacing - ±3.0 to 5.0 kHz  
20 kHz Channel Spacing - ± 2.4 to 4.0 kHz  
12.5 kHz Channel Spacing - ±1.5 to 2.5 kHz  
3. Adjust potentiometer R18 (DEV) on the module for  
the following deviation:  
25 kHz Channel Spacing - ±3.5 kHz  
20 kHz Channel Spacing - ±2.8 kHz  
12.5 kHz Channel Spacing - ±1.7 kHz  
NOTE: It is recommended that scanning not be used  
with these options because in may cause part or all of  
the tone burst to be missed.  
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OPERATION  
SECTION 3 OPERATION  
Volume  
Down  
Volume  
Up  
Transmit  
Indicator  
Busy  
Indicator  
Bell  
Indicator  
Monitor  
Indicator  
Alphanumeric Channel  
Display Up*  
Channel  
Down*  
Programmable Option Switches  
Scan List  
Indicator  
Microphone  
Connector  
Power  
Switch  
* The Channel Up/Down switches can also be programmed for other functions.  
Figure 3-1 7600 Front Panel  
3.1 FEATURES  
Normal and priority scan to ensure that calls are not  
missed  
Up to 32 channels programmable  
Up to five different user programmable scan lists  
Multi-tone (CTCSS) and/or Multi-code (CDCSS)  
selectable  
Call Guard® squelch programmable  
Bank select available (up to two banks with sixteen  
VHF and UHF, wideband and narrowband models  
channels each)  
available  
User selectable power output available  
DTMF microphone optional  
Up to 45 watts VHF and 35 watts UHF transmitter  
power output  
Seven-character alphanumeric display with back-  
2-tone/5-tone signaling optional  
light  
Six programmable option keys  
Busy indicator  
NOTE: Some of the preceding features are available  
only if programmed.  
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OPERATION  
3.2 CONTROLS AND DISPLAY  
Monitor Indicator (  
) - Indicates that the monitor  
mode is enabled. This mode disables coded squelch  
control so that all messages occurring on the channel  
are heard. Refer Section 3.4.4 for more information.  
3.2.1 FRONT PANEL CONTROLS  
Power Switch (  
) - Press this switch to turn power  
on and press and hold it to turn power off. The trans-  
ceiver may be programmed so that a password must be  
entered to allow operation. Refer to Section 3.3.2 for  
more information.  
Display - This seven-character display indicates the  
selected channel, status information, and error condi-  
tions. If information in this display begins flashing, an  
error condition is indicated. Two possible causes are a  
defective antenna or a battery voltage below 8 VDC.  
Volume Up/Down Keys (  
) - Adjust the vol-  
ume level up or down in up to 32 steps. The minimum  
selectable volume level can be set as described in  
3.2.3 BACK PANEL  
External Speaker Jack - Miniature phone jack for  
connecting an optional 4-8 ohm external speaker. The  
internal speaker is automatically disabled when a  
speaker is plugged into this jack.  
Up/Down Keys (  
) - These keys may be pro-  
grammed to select the next higher or lower channel or  
for other functions. Refer to the descriptions in Section  
3.5 for more information.  
Antenna Jack - UHF-type jack for connecting the  
antenna.  
Microphone Connector - Connection point for the  
microphone. Do not connect microphones other than  
standard microphone P.N. 589-7600-020 and DTMF  
microphone P.N. 589-7600-022 to this transceiver. The  
pin assignments could be different and damage to the  
microphone or transceiver may result.  
DC Power Cable - Connects the transceiver to a nom-  
inal 12 VDC, negative ground vehicle power source.  
Refer to Section 2-1 for more information.  
Accessory Cable - This optional cable is used to con-  
nect accessories such as a horn alert and modem to the  
transceiver. Refer to Section 2-1 for more information.  
F1/F2/F3/F4 - These keys can be programmed to con-  
trol any of the functions described in Section 3.5. Place  
the applicable included label on the switch to indicate  
its function.  
Ext Speaker  
Jack  
Antenna  
Jack  
3.2.2 DISPLAY  
Transmit Indicator (  
) - Indicates that the trans-  
DC Power  
Cable  
Optional  
Accessory Cable  
mitter is keyed or the 5-tone code is being sent (if appli-  
cable). If this indicator is flashing, the internal  
temperature is high and the transmitter power output is  
being cut back. Normal operation automatically  
resumes when the temperature returns to the normal  
range.  
Transceiver Back Panel  
3.3 BASIC OPERATION  
Busy Indicator (  
) - Indicates the currently selected  
channel is busy (see Section 3.4.4).  
3.3.1 TURNING POWER ON AND OFF  
Bell Indicator (  
5-tone call is detected that the transceiver is  
programmed to receive.  
) - Appears or flashes when a  
When power is turned on by pressing the  
POWER switch, a tone sounds and an opening mes-  
sage is displayed if programmed. The transceiver is  
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OPERATION  
then ready to be used. To turn power off, press and  
hold the POWER switch until power turns off.  
and then again to return to the normal channel  
display.  
3.3.2 ENTERING A PASSWORD  
F1 - Minimum volume level (see Section 3.3.3)  
F2 - Key beep on-off (see Section 3.5.4)  
The transceiver may be programmed so that a  
password must be entered before the transceiver can  
be used. When power is then turned on, “PWORD” is  
displayed and the four-digit passcode must be entered.  
This code is entered using the F1-F4 and channel  
F3 - Backlight on-off (see Section 3.5.2  
F4 - Squelch adjust (see description which follows)  
3. To return the F1-F4 keys to the programmed func-  
tions, turn transceiver power off and on again with-  
down (  
) keys. The number entered by each key is  
out  
pressed.  
as follows. The numbers in a block are detected as the  
3.3.5 CHANNEL SELECTION  
Key  
F1  
0
5
F2  
1
6
F3  
2
7
F4  
3
8
Number  
Entered  
4
9
Channel Scrolling - If the  
keys are pro-  
keys, they can be  
grammed as  
or  
CH DN  
CH UP  
same. For example, “1234” is the same as “6789”. If  
the “PWORD” indication does not turn off after enter-  
ing four digits, you may have entered an incorrect  
number. Cycle transceiver power and try again.  
pressed to scroll up or down through the programmed  
channels.  
Direct Selection - The F1-F4 and  
keys can  
be programmed to directly select a specific channel.  
3.3.3 VOLUME LEVEL ADJUSTMENT  
These keys are then labeled CH 1 to CH 4 .  
The volume can be adjusted in up to 32 steps by  
pressing the volume up/down keys (  
graph in the alphanumeric display indicates the current  
volume level. If equipped with a option switch,  
you may be able to press (or press and hold) that  
switch to enable audio for use as a reference level.  
). A  
3.3.6 ADJUSTING SQUELCH LEVEL  
The squelch level is adjusted by programming or  
selecting the power-on menu just described. Proceed  
as follows to use the power-on menu:  
MONI  
The minimum selectable volume level can be set  
by the power-on menu described in Section 3.3.4.  
Select this mode and then press F1 to display  
“AFMIN”. Then press the volume up/down keys to  
select the desired minimum level. The current level is  
indicated by the bar graph, or receiver noise can be  
enabled as described in Section 3.3.6.  
1. Select a non-busy channel. Then select the power-  
on menu by turning power on with the up and down  
keys pressed.  
2. Press the F4 option key to select the squelch adjust  
mode indicated by “SQ xx”.  
3. Press the down  
the speaker (adjust the volume if necessary). Then  
press the up key until the noise just mutes (the  
key until noise is heard from  
3.3.4 POWER-ON MENU  
The power-on menu is a special menu that can be  
selected at power on to control various functions.  
Proceed as follows:  
“SQ xx” number indicates the relative squelch  
level).  
4. Reselect normal operation by turning power off and  
on without the up and down keys pressed.  
1. Select the power-on menu by turning power on with  
the up and down  
keys pressed.  
NOTE: If weak messages are not heard or unsquelch-  
ing occurs when no messages are present, slight read-  
justment up or down may be required.  
2. The F1-F4 keys now control the following func-  
tions. Press the switch once to select the function  
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OPERATION  
3.3.7 BANK SELECT  
a microphone with a telephone keypad, or up to seven  
telephone numbers also may be preprogrammed and  
then selected by pressing the DTMF key (see descrip-  
tion in Section 3.5.7).  
Two banks of up to 16 channels each can be pro-  
grammed. Only the channels in the current bank are  
then selectable. This would allow, for example, groups  
of channels to be programmed for operation in differ-  
ent cities.  
3.4.2 RECEIVING A CALL  
1. Turn transceiver power on and set the volume level  
as described starting in Section 3.3.1.  
The BANK key is pressed to switch between  
banks, and the current bank is indicated briefly in the  
display as “BANK 1” or “BANK 2”. If bank select is  
not used, a single block of up to 32 channels can be  
programmed.  
2. Select or scan the channel or channels on which you  
want to receive the call. Refer to Section 3.6 for  
more information on scanning.  
3.3.8 AUTOMATIC SCAN ENABLE  
3. When the message is received, take the microphone  
off-hook and respond. Press the microphone push-  
to-talk (PTT) switch to talk and release it to listen.  
The transceiver can be programmed so that scan-  
ning is automatically enabled whenever power is  
turned on or the microphone is placed on-hook. Refer  
to the scan description in Section 3.6 for more  
information.  
4. When the conversation is finished, place the micro-  
phone back on-hook. The microphone hanger may  
control features such as scanning and monitoring  
that are described later.  
3.3.9 BACKLIGHT ON-OFF  
3.4.3 PLACING A CALL  
The following backlight modes can be selected  
by the LITE option switch or by pressing F3 in the  
power-on menu described in Section 3.3.4.  
1. Turn transceiver power on and set the volume level  
as described starting with Section 3.3.1.  
LI ON - On continuously  
LI OF - Always off  
2. Select the channel on which the call will be made as  
described in Section 3.4.  
LI AT - Controlled by the voltage applied to pin 1  
of the DB9 connector on the optional accessory  
cable (see “Light” in Table 4-2).  
3. Regulations require that the channel be monitored  
before transmitting to make sure that it is not being  
used by anyone else. If you were to transmit while  
someone was talking, you would probably disrupt  
their conversation. Refer to “Monitoring Before  
Transmitting” description which follows for more  
information.  
3.3.10 BEEP ON-OFF  
The key beep which sounds when keys are  
pressed can be enabled and disabled by pressing the  
BEEP option switch or pressing F2 in the power-on  
menu described in Section 3.3.4. Either “BP ON” or  
“BP OF” is displayed to indicate the current mode.  
4. If the channel is not busy, press the microphone PTT  
switch to talk and release it to listen.  
5. When the conversation is finished, place the micro-  
phone back on-hook.  
3.4 RECEIVING AND PLACING CALLS  
3.4.1 INTRODUCTION  
3.4.4 MONITORING BEFORE TRANSMITTING  
The two calls which can be placed and received  
are mobile-to-mobile and telephone calls. With tele-  
phone calls, the telephone number can be dialed using  
Use one of the following methods to monitor the  
channel before transmitting a message:  
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OPERATION  
Table 3-1 Option Key Programmable  
Functions  
Note if the busy indicator (  
) on the front panel  
is being displayed. If it is not, the channel is not busy  
and a message can be transmitted.  
Description  
Section No.  
Function  
Key Label  
Taking the microphone off-hook disables coded  
squelch control if it is programmed for the monitor  
function. Take the microphone off-hook and the  
indication should be displayed. If no messag-  
es are heard, the channel is not busy and a message  
can be transmitted.  
Backlight On-Off  
Bank Select  
LITE  
BANK  
BEEP  
TONE  
Beep on-off  
Call Guard Tone Select  
Channel Select  
CH UP CH DN  
CH 1 CH 2  
CH 3 CH 4  
If the monitor ( MONI ) option switch is pro-  
grammed, pressing it disables coded squelch control  
similar to taking the microphone off-hook. If no  
messages are then heard, the channel is not busy and  
a message can be transmitted. Press the switch again  
to disable monitoring.  
DTMF Number Select  
Emergency Switch  
Lock enable/disable  
Monitor Mode Select  
Output Power Select  
DTMF  
EMER  
LOCK  
MONI  
HIGH LOW1  
LOW2  
If the Transmit Disable On Busy feature is pro-  
grammed on the channel, the transmitter is automat-  
ically disabled if the channel is busy. This is  
indicated by the display flashing and a rapid beeping  
when the PTT switch is pressed.  
Priority Channel Select  
Receive Attenuate  
Scan Select  
PRI A PRI B  
ATT  
SCAN  
TAG  
TA  
Scan List Programming  
Talk-Around Select  
2-Tone, 5-Tone Calling  
3.4.5 TIME-OUT TIMER  
The time-out timer disables the transmitter if it is  
keyed continuously for longer than the programmed  
time. If the transmitter is disabled by this feature, the  
CALL CAL A  
CAL B TX CH  
CODE ID MR  
transmit indicator (  
) turns off and the display  
Wide/Narrow Band  
Select  
W/N  
flashes and a beeping tone is produced until the PTT  
switch is released.  
One use of this feature is to prevent a channel  
from being kept busy for an extended period by an  
accidentally keyed transmitter. It can also prevent pos-  
sible damage to the transceiver caused by transmitting  
for an excessively long period.  
Table 3-1. A sheet of labels is included with the trans-  
ceiver, and the applicable label should be placed on the  
key to indicate its function. Refer to the section listed  
in the table for a description of the function.  
There is also a penalty timer that may be pro-  
grammed to prevent further transmissions for the pro-  
grammed time after the transmitter is disabled.  
3.5.2 BACKLIGHT ON-OFF  
3.5.3 BANK SELECT  
3.5.4 BEEP ON-OFF  
3.5 PROGRAMMABLE FUNCTIONS  
3.5.1 INTRODUCTION  
The F1-F4 and  
keys on the front panel  
can be programmed for the functions shown in  
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OPERATION  
3.5.5 CALL GUARD TONE SELECT  
transmission begins, the call cannot be canceled. Pro-  
gramming determines the channel on which the call is  
transmitted and also if it is transmitted once or repeat-  
edly until a control code is received.  
If the transceiver has a TONE key, the Call  
Guard (CTCSS) tone can be selected. This allows calls  
to be placed to different mobiles or groups of mobiles  
and received on different groups than is normal for the  
channel. Proceed as follows:  
3.5.9 LOCK KEY  
Press and hold the  
key to lock all pro-  
LOCK  
1. Press the TONE key and “TON--x” is displayed.  
grammable keys except CALL MONI and EMER .  
Either “LK ON” or “LK OF” is displayed to indicate  
the current condition. If a locked key is pressed, all  
that happens is “LOCK” is displayed.  
2. Press the channel up/down (  
) keys to  
select the desired tone (“TON--1” to “TON--9”).  
3. Press the TONE key again to exit this mode. Calls  
are then placed on the current channel and other  
channels using the new code until it is changed.  
3.5.10 MONITOR MODE SELECT  
4. To reselect the standard Call Guard squelch tone  
programmed for the channel, select “TON--M”  
using the same procedure.  
3.5.11 OUTPUT POWER SELECT  
The HIGH LOW1 and LOW2 keys can be used  
to temporarily or permanently override the pro-  
grammed power output for the channel. The program-  
ming of the “RF Power Selection” parameter in Table  
4-2 determines operation. Pressing the key once  
selects the level on the key and pressing it again  
selects the programmed level.  
3.5.6 CHANNEL SELECT  
3.5.7 DTMF NUMBER SELECT  
If the transceiver has a  
key, up to seven  
3.5.12 PRIORITY CHANNEL SELECT  
DTMF  
preprogrammed telephone numbers can be transmit-  
ted. Proceed as follows:  
Pressing PRI A selects the priority A channel  
and pressing  
selects the priority B channel.  
PRI B  
1. Press the DTMF key and the currently selected  
The PRI A key can also be programmed so that press-  
ing and holding the key makes the current channel the  
priority A channel. Refer to Section 3.6.3 for more  
information.  
number is indicated as “DTMF x”.  
2. Press the channel up/down keys (  
select a different number.  
) to  
3.5.13 RECEIVE ATTENUATE  
3. To transmit the selected number on the current  
channel, press and hold the DTMF key.  
Pressing the ATT key turns receive signal  
attenuation on and off. Either “AT ON” or “AT OF” is  
displayed to indicate the current mode. The attenuator  
can be turned on if nearby strong RF signals such as  
commercial radio stations or pager transmitters are  
causing distortion of the receive signal.  
NOTE: The DTMF 6 number is used for emergency  
calls and the DTMF 7 number is used for automatic  
logging. Therefore, if these features are used, the  
number may not be available for regular calls.  
3.5.8 EMERGENCY KEY  
3.5.14 SCAN SELECT  
Press and hold the EMER key to transmit an  
emergency call. To cancel this call before it is trans-  
mitted, press and hold this key again. Once emergency  
Pressing the SCAN key turns the channel scan  
feature on and off. Refer to Section 3.6 for more  
information.  
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OPERATION  
3.5.15 SCAN LIST PROGRAMMING  
display briefly indicates “WIDE” or “NARROW” to  
indicate the current mode. Each channel can also be  
programmed for wide or narrow band operation, and  
this switch toggles that setting. However, the change is  
only temporary because the programmed condition is  
reselected if the channel is changed or power is cycled.  
Pressing the TAG key changes the scan list sta-  
tus of the current channel. Refer to the scan list  
description in Section 3.6.2 for more information.  
3.5.16 TALK-AROUND SELECT  
The talk-around mode causes transmissions to  
occur on the receive frequency to permit direct  
mobile-to-mobile communication when a repeater is  
being used. The talk-around mode is turned on and off  
by pressing the TA key. Either “AR ON” or “AR  
OF” is briefly displayed to indicate the current mode.  
Changing the channel or turning power off causes talk-  
around to revert to the off condition.  
3.6 CHANNEL SCAN  
3.6.1 INTRODUCTION  
The channel scan feature monitors the channels in  
the current scan list. When a message is detected that  
the transceiver is programmed to receive, scanning  
stops and the message is received. Shortly after the  
message is complete, scanning resumes (after the  
resume timer counts down). The selected channel  
changes to that of the call.  
3.5.17 2-TONE CALLING FEATURES  
If the optional 2-tone signaling option is used,  
pressing the CALL key transmits the 2-tone codes on  
the selected channel or on a non-busy channel if  
pressed while scanning.  
If the microphone is taken off-hook or the trans-  
mitter is keyed while scanning, scanning resumes  
when the auto reset timer selected for the channel  
counts down. Scanning does restart if this timer is dis-  
abled or if the Scan A key is programmed with power-  
on scan disabled (see Tables 4-2 and 4-5).  
3.5.18 5-TONE CALLING FEATURES  
If the optional 5-tone signaling option is used, the  
following keys may be programmed to control various  
functions.  
Scanning is turned on and off by the SCAN key.  
The transceiver also may be programmed so that scan-  
ning automatically turns on whenever power is turned  
on or the microphone is placed on-hook. The micro-  
phone must be on-hook for scanning to occur.  
- Transmit the 5-tone call.  
CALL CAL A CAL B  
Depending on your signaling system, call transmission  
may be necessary before you call another station. The  
CAL A and CAL B keys may be programmed when  
selective Individual/Group calls are used.  
The decimal point in the display flashes when the  
scan mode is enabled. Then when scanning is actually  
occurring, either the scan list identification (see next  
section) or the rapidly cycling channel identification is  
displayed as the channels are scanned. Programming  
determines which occurs (see Table 4-5).  
- Selects the 5-tone code to be transmitted. To  
TX CH  
change the contents of the station code, push and hold  
this key and then press the keys.  
CODE - Selects the transmit code directory.  
3.6.2 SCAN LISTS  
- Recalls last five codes received. Press and  
MR CH  
hold to erase all codes. To scroll, press  
.
Up to five scan lists can be selected by pressing  
and holding the SCAN key until the scan list identifi-  
3.5.19 WIDE/NARROW BAND SELECT  
cation appears and then pressing the  
keys.  
Press the SCAN key again to exit this mode (this also  
occurs automatically in about 30 seconds) and again to  
enable scanning (if desired).  
Pressing the W/N key switches the receiver  
between narrowband and wideband operation. The  
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OPERATION  
The scan lists are user programmable if the  
key is available. Pressing this key changes the  
messages on other channels. If priority sampling is  
used, a priority A channel is designated by program-  
ming. If the PRI A key is available, pressing that key  
selects the priority A channel. This key also may be  
programmed so that if it is pressed and held, the prior-  
ity A channel changes to the current channel.  
TAG  
status of the displayed channel in the current scan list  
only. The display indicates “SC ON” if the channel  
was just added to the scan list and “SC OF” if it was  
just deleted. In addition, the scan list status is indicated  
by the decimal point in the display. This indicator is on  
when the displayed channel is scanned. The decimal  
point flashes when scanning is occurring.  
Sampling of the priority A channel occurs only  
when scanning is enabled. It does not occur while  
transmitting. When the priority channel is sampled  
while listening to a message on another channel, a  
series of “ticks” are heard. These ticks are brief inter-  
ruptions of the audio signal that occur while the trans-  
ceiver changes channels to check the priority channel.  
The scan list status of a channel can be changed  
while scanning only when listening to a message on  
the channel. The current status of all the lists is stored  
in memory. Therefore, the status of the various scan  
lists does not change when power is turned off.  
Another priority channel also can be programmed  
that can be quickly selected by the PRI B key. This  
channel is programmed only to allow quick selection  
and is not sampled while listening to a non-priority  
channel.  
3.6.3 PRIORITY CHANNEL SAMPLING  
Priority channel sampling ensures that messages  
on priority channels are not missed while listening to  
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PROGRAMMING  
SECTION 4 PROGRAMMING  
Programming Cable  
(Includes Level Convert. Circuit)  
P.N. 585-7500-031  
Female DB9 Plug To Computer  
Adapter Cable  
P.N. 585-7600-031  
Figure 4-1 Programming Setup  
4.1 GENERAL  
connect the computer to the transceiver. The program-  
ming cable has a female DB9 connector which plugs  
into the serial port of the computer. In this connector is  
a level converter circuit which converts the RS-232  
levels of the computer to the logic levels required by  
the transceiver. The other end of the cable plugs into  
the adapter cable which adapts the miniature phone  
plug to the modular-style microphone connector on the  
transceiver. Turn transceiver power on after these  
cables are connected.  
4.1.1 PROGRAMMING SETUP  
The following items are required to program this  
transceiver. The part numbers of the programming  
cable and software are shown in Table 1-1. A printer is  
also recommended for making a hard copy record of  
the information programmed into the transceiver. The  
programming setup is shown above.  
IBM® PC AT or PS/2 compatible computer with  
one available serial port  
4.1.3 PROGRAMMING SOFTWARE  
MS-DOS® version 5.02 or higher or equivalent  
E.F. Johnson programming cable (includes required  
level converter circuit) and adapter cable  
E.F. Johnson programming software  
The programming software is distributed on a  
3-1/2” 1.44 M diskette. This diskette includes the main  
executable program RP7600.EXE and several ancil-  
lary files it requires to run. These files total approxi-  
mately 430k in size. Also included on this disk is the  
ADJUST program used to tune the transceiver. This  
program and other files it requires to run total about  
180k in size and are located in a separate subdirectory  
4.1.2 PROGRAMMING CABLES  
Programming Cable, Part No. 585-7500-031, and  
Adapter Cable, Part No. 585-7600-031, are required to  
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PROGRAMMING  
on the disk called ADJ. The use of this program is  
described in Section 5.  
The Space or backspace key toggle the setting.  
Use the File menu to save the data and exit the  
These are DOS programs, so Windows® 3.x, 95,  
or NT are not required to run them. If the program  
does not run properly in Windows, run it in the DOS  
mode.  
program.  
4.4 MENU FLOW  
Before you use the program, the files on the dis-  
kette should be copied to your hard disk or a program-  
ming disk. Do not use the distribution disk for pro-  
gramming or transceiver tuning because it should be  
kept as a backup in case something happens to the pro-  
gram on the working disk.  
4.4.1 INTRODUCTION  
The menu bar along the top of the screen is used  
to select the various menus that are used to program  
this transceiver. Press the ALT or ESC key to enable  
this menu bar. Then to move horizontally to select a  
menu, use the arrow () keys or type the high-  
lighted letter in the title. Then to display the menu and  
highlight the desired item, use the arrow () keys  
and then press ENTER to select it. The following  
describes each of the menus that can be selected.  
4.2 STARTING THE PROGRAM  
Proceed as follows:  
1. Start the computer in the DOS mode. If the program  
is not installed on a hard drive, insert the program-  
ming disk in drive A.  
4.4.2 FILE MENU  
2. Make the directory of the program the current direc-  
tory. Then start the program by typing RP7600  
(Enter).  
3. The Memory Channel screen described in Section  
4.4.3 is then displayed. Set or modify the data as  
desired. Make sure to scroll right using the key so  
the right-most screen parameters can be  
programmed.  
Load - Loads data from a previously saved data file.  
To display the directory, press (Enter) again.  
4.3 SPECIAL KEYS AND FUNCTIONS  
Save - Saves the current data to the specified file. The  
extension “.ICF” is automatically added to the file  
name.  
Information on the various parameters is available  
in the form of help screens. To display information  
on the currently highlighted function or setting,  
press F1.  
Delete - Deletes the current file.  
Pressing ALT or ESC selects the menu on top or  
Dos - Allows you to go to the DOS mode to perform a  
function in DOS such as copying a file. To return to  
the previous screen, type EXIT.  
returns to the previous screen.  
↑ ↓ keys or highlighted character keys move the  
cursor.  
Exit - Quits the program and exits to DOS.  
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PROGRAMMING  
4.4.3 SCREEN MENU  
Common - Displays the screen shown in Table 4-7  
which programs miscellaneous information such as  
various timer settings.  
Expert - Displays the screen shown in Table 4-8  
which programs various timers and other information.  
Normally, the default value in this screen should not  
be changed.  
4.4.4 PROGRAM MENU  
LMR (U.S.) Format  
NOTE: The Screen menu for PMR (European) models  
is slightly different than the LMR version shown  
above. Refer to Section 4.5 for more information on  
PMR models.  
Memory Channel - Displays the screen shown in  
Table 4-1 which is used to program channel parame-  
ters such as frequency, Call Guard (CTCSS/DCTS)  
coding, and power output. The screen in Table 4-1 is  
for LMR models; refer to Section 4.5 for information  
on the PMR version.  
Read TR - Reads the data programmed in the con-  
nected transceiver.  
Write TR - Programs the connected transceiver  
with the current data.  
Information - Displays information on the connected  
transceiver such as the model, revision, and the “Pro-  
gram Comment” programmed in the Common screen  
Key and Display Assign - Displays the screen shown  
in Table 4-2 which assigns functions to the  
programmable keys.  
DTMF Autodial - Displays the screen shown in Table  
4-3 which programs five DTMF code channels (pre-  
stored telephone or other numbers). Up to 24 charac-  
ters can be programmed in each location.  
4.4.5 PRINT MENU  
Continuous Tone - Displays the screen shown in  
Table 4-4 which programs nine user selectable Call  
Guard (CTCSS) tones.  
Current - Prints the currently displayed data.  
All - Prints all data for the selected file.  
4.4.6 MODEL MENU  
Scan List - Displays the screen shown in Table 4-5  
which programs various parameters for each scan list.  
2-Tone Code Channel - Displays the screen shown in  
Table 4-6 which programs transceiver operation with a  
2-tone option. The optional 2/5-Tone Decoder Kit,  
Part No. 585-7500-026, is required to use the 2-tone  
function. This screen is displayed with LMR models  
only (see Section 4.4.6).  
LMR - Selects LMR (U.S.A.) models. Selecting this  
model displays unique parameters in various screens  
for programming a 2-tone option. The differences are  
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PROGRAMMING  
Refer to Section 4.5 for more information on PMR  
models.  
4.4.7 SETUP MENU  
in the Screen menu (see Section 4.4.3), Memory  
Channel screen (see Table 4-1), and DTMF Autodial  
screen (see Table 4-3).  
PMR - Selects PMR (European) models. Selecting  
this model displays unique parameters for program-  
ming a 5-tone option. As with the LMR selection,  
unique parameters are displayed in the Screen menu  
and Memory Channel and DTMF Autodial screens.  
Display Type - Select the color or monochrome 1 or 2  
display modes.  
RS-232C - Selects the computer serial port being used  
to connect the computer to the transceiver.  
Table 4-1 Memory Channel Screen Description (LMR Models)  
Parameter  
Description  
NOTE: To display this part of the screen, scroll over using the arrow key.  
Bank Select  
Up to 32 channels or two banks of 16 channels can be programmed. To program the channels as two banks, first  
program the “MR-CH Bank/Free” parameter in the Key and Display Assign screen for “Bank” as described in Table 4-2. In  
addition, a “Bank” option switch must be programmed in this screen to select banks. To switch between banks when  
programming channels, press the PgUp/PgDn keys.  
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PROGRAMMING  
Table 4-1 Memory Channel Screen Description (LMR Models) (Continued)  
Description  
Parameter  
Ch Atr Press (Enter) to display the menu which selects one of the following choices:  
(Channel  
Attribute) A: Priority A - The channel is selected when the Prio A key is pressed, and it is monitored during priority scan.  
In addition, the microphone hanger can be programmed so that this channel is automatically selected when-  
ever an off-hook condition occurs (see Table 4-2).  
B: Priority B - The channel is quick selected when the Prio B key is pressed. It is not monitored during priority  
scan.  
E: Emergency Channel - Transmission occurs on the channel when the Emergency switch is pressed.  
Emergency Off - Deletes the emergency designation on current channel if applicable. If no emergency channel  
is designated, transmission occurs on the currently selected channel.  
SmarTrunk II™ On/Off - Toggles the SmarTrunk function on and off on the bank. This function is not  
available with this transceiver.  
Channel Insert - Inserts a blank channel by pushing the other channel information down one line.  
Channel Delete - Deletes the programming information on the current line and moves the channel information  
below it up one line.  
Return - Exits the menu and returns to the main screen.  
Frequency Enter the desired frequency for the channel. Enter a frequency within the frequency range of the transceiver:  
(Rx/Tx) VHF = 136-155 or 146-174 MHz, UHF = 400-430, 450-470, 470-490, or 488-512 MHz. Channel steps in mul-  
tiples of 5.0, 6.25, or 7.5 kHz only. If no receive frequency is entered, no other data can be programmed on the  
line. Other special functions associated with frequency are as follows:  
Rx Freq - Press the backspace key to toggle between wide and narrowband. Narrowband is indicated by “n” to  
the right of the frequency. Press the spacebar to toggle receive inhibit on and off indicated by “i” to the left  
of the frequency. This limits the channel to priority or emergency use only (it is not available as a regular  
channel).  
Tx Freq - To enter the same frequency as the receive frequency, enter nothing or “=”. The “” symbol means  
same as receive frequency. Enter a space to disable transmitting on the channel (“Inhibit” is then displayed).  
F8 and F9 can be used to cut and paste frequencies. Press (Enter) when the desired frequency has been  
entered.  
CTCSS/ Enters the receive and transmit tone (CTCSS) Call Guard® frequency or digital (DTCS) Call Guard code. Press  
DTCS  
(Enter) to display the tone selection table. Select a tone by scrolling to it and pressing (Enter). Press the space-  
(Rx/Tx) bar or backspace key to increase or decrease the entered frequency. The “” symbol means same as receive  
code.  
The length of the CTCSS reverse burst can be set by the “CTCSS Reverse Burst” parameter on the Common  
Screen (see Table 4-7). A non-standard CTCSS tone from 60.1 to 300.1 Hz can be specified on the Expert  
screen and then selected by “USER”. If a CTCSS tone is selected by the TONE option switch, it overrides the  
channel programming until “TON--M” is reselected.  
Digital codes must always be entered directly (there is no table) and tone frequencies can be entered directly. Be  
sure to enter the tone decimal point or the number is interpreted as a digital code. To toggle the polarity of digi-  
tal codes, press the spacebar or backspace key. The N or I indicates Normal or Inverted polarity. In  
addition, the polarity of digital Call Guard signaling for all channels is set on the Expert screen.  
Text  
Programs the 7-character alpha tag that is displayed when a channel is selected. If no text is programmed, the  
channel number is displayed as CH-xx. Allowable characters are A-Z (upper or lower case), 0-9, ’ * , + $ ’ ( ) –  
/ < = > ? @ [ \ ] _ { | } ~. However, some characters, especially lower case letters, may be difficult to see. The tx  
up arrow is displayed by “:” , and the rx down arrow by “;”. Special characters may be programmed in the  
Expert screen (see Table 4-8) and used for the positions 3-7 only (positions 1 and 2 can display only regular  
characters). To enter a special character, press PgUp/PgDn to scroll through and select characters A-P.  
Disables the transmitter on that channel if it is keyed continuously for longer than the programmed time. The  
TOT  
(Time-Out times for this timer and other related functions are programmed in the Common Screen (see Table 4-7).  
Timer)  
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PROGRAMMING  
Table 4-1 Memory Channel Screen Description (LMR Models) (Continued)  
Description  
Parameter  
RF PWR Programs the RF power output for the channel (High, Low1, Low2). This setting can be temporarily or perma-  
nently overridden by the HIGH, LOW1, or LOW2 power option switch if it is programmed (see Table 4-2).  
Lockout Transmit Disable On Busy. The following conditions can be programmed:  
Off - No restrictions; the transmitter can be keyed even while receiving a signal.  
Busy - Transmitting is inhibited if the channel is busy (carrier present).  
Repeater 1 - Transmission is permitted only when (1) receiving a signal on the programmed Call Guard tone or  
code (CTCSS/ DCTS) or (2) when no carrier is being detected.  
Repeater 2 - Transmission is permitted when (1) receiving any Call Guard tone or code (CTCSS/DCTS) or (2)  
when no carrier is being detected.  
NOTE: If an attempt is made to transmit in a lockout condition, transmitting is inhibited for the “Lockout  
Penalty Time” programmed on Common screen (see Table 4-7).  
Scan  
Assigns the channel to up to five scan lists and also programs if the scan list status can be changed by the scan  
list programming key (TAG). Press the spacebar to enter or delete all lists or press 1-5 to toggle the status of a  
list. Press the backspace key to toggle the inhibit status. Scan list programming is inhibited when parentheses  
are displayed around the numbers (or underline characters).  
Auto Reset If PWR ON Scan is enabled in the Scan screen (see Table 4-5), this selects the time delay before scanning  
resumes after a call is complete (the signal disappears) or a key is pressed. Either Timer A or Timer B can be  
selected. These timers are programmed in the Common Screen (see Table 4-7). Auto reset can be turned off by  
setting the timer to “Off” (0).  
2-Tone  
Enables 2-tone operation on the channel and specifies the 2-tone code used. The 2-tone codes are programmed  
in the 2-Tone Code Ch screen (see Table 4-6). This requires the optional 2/5-tone module.  
Log On/Off Specifies if the DTMF ID code is transmitted when the PTT switch is pressed and released. The DTMF code is  
specified on the Log/ID line of the DTMF Autodial screen (Table 4-3). In the Common screen, if “TOT Timer  
ID Out” is “Yes”, this ID is also transmitted just before the transmitter is disabled by the time-out timer. The  
following conditions can be programmed:  
OFF (blank) - No ID code is transmitted.  
Log In - The ID code is transmitted when the PTT switch is pressed.  
Log Off - The ID code is transmitted when the PTT switch is released.  
Both - The ID code is transmitted when the PTT switch is pressed and again when it is released.  
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PROGRAMMING  
Table 4-2 Key and Display Assign Screen Description  
KEY ASSIGN PARAMETERS  
The  
and F1-F4 option keys can be programmed for the following functions. Press the (Enter) key and then  
PgUp/PgDn to display and then select the desired function.  
Key  
Parameter  
Label  
Description  
Null  
---  
No function (key disabled).  
CH Up  
CH UP Scroll up or down through the programmed channels. Holding the key down causes the function to  
CH Down CH DN repeat.  
MR-CH 1 CH 1  
MR-CH 2 CH 2  
MR-CH 3 CH 3  
MR-CH 4 CH 4  
Directly selects Channels 1, 2, 3, or 4, respectively.  
Bank  
BANK Toggles the current bank between Bank 1 and Bank 2. This key can be programmed only if the “MR-  
CH Bank/Free” parameter in this screen is programmed “Bank”.  
SCAN Pressing this key toggles scanning on and off. In addition, pressing and holding the key enables the  
scan list select mode. The current scan list is indicated, and it is changed by pressing the up/down  
keys. Either the Scan A or Scan B mode or both can be programmed. Operation is as follows:  
Scan A  
Scan A  
Scan B  
Start/Stop  
Power-On Scan “Off” (see Table 4-5) - It starts and stops scanning with no auto restart. If the trans-  
mitter is keyed during scanning, the scan mode is exited.  
Power-On Scan “On” - It stops scanning only until the Auto Reset Timer expires (see Table 4-7). If  
the transmitter is keyed during scanning, scan automatically resumes when the Auto Reset Timer  
expires.  
Scan B  
Power-On Scan “Off” or “On” - It starts and stops scanning with auto restart. If the transmitter is  
keyed during scanning, scan automatically resumes when the Auto Reset Timer expires.  
Scan Add/ TAG  
Delete  
Scan list programming key. Pressing this key changes the scan list status of the current channel in the  
current scan list (see Section 3.6.2).  
Prio A  
PRI A Pressing a Prio A key selects the Priority A channel, and pressing a Prio B key selects the Priority B  
Prio A (Re) PRI A channel. Pressing a Prio A (Rewrite) key also selects the Priority A channel. In addition, if it is held, the  
Prio B  
PRI B current channel is made the Priority A channel. Priority channel sampling is programmed in the Scan  
List screen (see Table 4-5).  
Moni  
(Audi)  
MONI Toggles the monitor mode on and off. This mode deactivates the Call Guard (CTCSS/DTCSS) or  
2-tone mute functions (see Section 3.4.4). Pressing and holding this key unsquelches the receiver for as  
long as it is held.  
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PROGRAMMING  
Table 4-2 Key and Display Assign Screen Description (Continued)  
Key  
Label  
Parameter  
Description  
RF ATT  
Lock  
ATT  
Toggles the receive attenuate function on and off (see Section 3.5.13).  
LOCK Locks/unlocks all programmable keys except CALL, MONI, and EMER to prevent them from being  
accidentally pressed (see Section 3.5.9).  
Beep  
BEEP Toggles the key beep function on and off (see Section 3.3.10).  
Light  
Bank Up  
High  
Low 1  
Low 2  
LITE  
Turns the LCD backlight on and off (see Section 3.3.9).  
Selects the other bank of sixteen channels if applicable.  
HIGH Changes the power output for the current channel to the level programmed of the key. Pressing the key  
LOW1 again reselects the preprogrammed power level for the channel. The change may be temporary or per-  
LOW2 manent for that channel depending on the programming of the “RF PWR Selection” parameter later in  
this screen (see description which follows).  
C. Tone  
CH Ent  
TONE (Continuous Tone Memory Channel) This key selects the continuous tone mode which allows the Call  
Guard (CTCSS) tone to be selected from the front panel (see Section 3.5.5). These tones are pro-  
grammed by the Continuous Tone screen described in Table 4-4.  
Talk  
TA  
Toggles the talk-around mode on and off (see Section 3.5.16).  
Around  
Wide/  
Narrow  
W/N  
Temporarily toggles between the wide and narrow band modes (see Section 3.5.19). When the channel  
is changed or power is cycled, the wide/narrow mode programmed for the channel frequency specified  
in the memory Channel screen is again selected.  
DTMF  
Autodial  
DTMF Pressing this key enables the DTMF autodial mode. After pressing this key, the number to be dialed is  
selected by the up/down keys. Then press and hold this key to transmit the number (see Sec-  
tion 3.5.7). The available DTMF numbers are programmed by the DTMF Autodial screen described in  
Emergency EMER Pressing this key transmits an emergency call. If “Single” is programmed, it is transmitted only once; if  
Single  
Repeat  
“Repeat” is programmed, it is transmitted repeatedly with LMR models, or until the proper 5-tone code  
is received with PMR models. The emergency channel is specified by the CH Atr parameter on the  
Memory Channel screen described in Table 4-1. A DTMF code is transmitted if it is entered on the  
“Emergency” line of the DTMF Autodial screen (see Table 4-3). Additional emergency parameters are  
programmed in the Expert screen described in Table 4-8.  
OPTx Out OPT1 A “OPT1-OPT3 Out” key switches the respective pin of the 30-pin option connector high or low (this  
OPT2 connector is located inside the transceiver, and is used, for example, by the optional 2/5-tone module).  
OPTx  
Mom Out  
OPT3 A “OPT1-OPT3 Momentary Out” key produces a high or low pulse on the respective pin of this 30-pin  
connector.  
Call  
CALL When equipped with the optional 2/5-tone module, transmits the 2-tone or 5-tone code.  
Call A/B CALL PMR mode w/5-tone option only. Transmits code using channel 30 (A) or 29 (B).  
Tx Code/ TX CH PMR mode w/5-tone option only. Selects transmit 5-tone code.  
CH Up/Dn  
ID MR  
Select  
ID MR PMR mode w/5-tone option only. Recalls and erases stored codes that have been received  
Trunking GRP  
Group  
This switch is for a SmarTrunk function, so it is not available with this transceiver.  
Switch  
OTHER MENU PARAMETERS  
Hanger  
Action  
Any or none of the following hanger functions can be programmed:  
Monitor - Disables CTCSS/DCTS Call Guard signaling on off-hook and re-enables it when back on-hook.  
Scan - Automatically enables scanning when placed on-hook.  
Prio A - Automatically selects the priority A channel when taken off-hook.  
Beep On/ Enables or disables the key press beep. This programming can be overridden by the power-on menu (see Section  
Off  
3.3.4) or BEEP key (see Section 3.3.10).  
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PROGRAMMING  
Table 4-2 Key and Display Assign Screen Description (Continued)  
Parameter  
Light  
Description  
Enables or disables the display and key backlight. This programming can be overridden by the power-on menu  
(see Section 3.3.4) or LITE key (see Section 3.3.9). The “Auto” configuration allows it to be controlled by pin 1  
of the DB9 connector on the optional accessory cable. The on condition is selected by 0 volts (low) and off by 12  
volts (high).  
RF Power This can be programmed for one of the following configurations:  
Selection MR CH Individual - The power output selected by the HIGH, LOW1, LOW2 keys (see preceding description)  
is only temporary. Power returns to the level programmed for the channel when the channel is changed or  
transceiver power is cycled.  
Override - The power output selected by above power keys overrides the channel programming. The selected  
level is permanent on the channel (changing the channel or cycling power does not change the selected power  
level). Pressing the key again on the channel reselects the preprogrammed level.  
MR-CH  
Free - Select if banks are not used. One block of up to 32 channels is programmed.  
Bank/Free Bank - Select if channels are to be programmed as two banks with up to 16 channels each. The BANK option  
switch must be programmed to select the banks (see Section 3.3.7).  
Opening If text is entered, it is displayed and a tone sounds for 2 seconds when power is turned on. If no text is pro-  
Text  
grammed, no tone sounds and no message is displayed. The characters and other information described for  
“TEXT” in Table 4-1 also applies to this text.  
Table 4-3 DTMF Autodial Screen Description  
This screen is used to program the DTMF autodial codes that can be transmitted by pressing the DTMF key (see Table  
4-2). Each location can contain up to 16 characters. Allowable characters are 0-9, A-D, *, and #. Press the INS key to toggle  
between the insert and overwrite modes. To clear a location, press the spacebar and then (Enter). Press ALT or ESC to cancel  
the entered codes before input. The code on the “Emergency” line is transmitted when the Emergency key is pressed (see  
Table 4-2). Likewise, the code on the “Log/ID” line is transmitted when the Log/ID channel parameter is enabled (see Table  
4-1) and when the time-out timer expires (see Table 4-7). With PMR models, “4” and “5” are displayed in place of “Emer-  
gency” and “Log/ID”.  
Parameter  
Description  
DTMF  
Timer  
Sets the time interval in seconds for each code emission and interval.  
1st Timer Sets the tone period in seconds for the first DTMF code. This period is affected by the scanning period and  
power saver function delays of receiving transceivers.  
[*] [#] Timer Sets the tone period in seconds for the * character (same as “E”) and # (same as “F”). These codes can be used  
for control codes on some systems. NOTE: When these special codes are used for the first code, the “1st  
Timer” has priority over this setting.  
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PROGRAMMING  
Table 4-4 Continuous Tone Screen Description  
Description  
The continuous tones programmed in this screen are selected by pressing the C.Tone CH Ent function key (see  
Table 4-2) and then pressing the up/down keys. This allows the user to select the continuous tone being transmitted  
and received on the current channel. To transmit or receive using the codes programmed for the channel in the channel screen  
(see Table 4-1), select “TON--M” using the keys.  
Table 4-5 Scan Function Screen Description  
Parameter  
Description  
This screen is used to configure each of the up to five scan lists that can be selected. Channels are assigned to a scan list  
in the Memory Channel screen described in Table 4-1 and by the TAG key described in Table 4-2. Scanning is turned on and  
off and a specific scan mode is selected by the SCAN key also described in Table 4-2. Scanning may be enabled at power on  
(see following) and by placing the microphone on-hook (see “Hanger Action” in Table 4-2).  
Scan Mode The following conditions are programmable:  
Scan Off - Deactivates that scan list so that it cannot be selected.  
M1 (Normal) - Selects normal (non-priority) scanning from the lowest to highest channel.  
M2 (Prio A) - Selects scanning from the lowest to highest channel while checking the Priority A channel. If  
scanning is turned off while receiving a message in the scan mode, the transceiver switches to that channel.  
M 3 (Prio A) - Same as Mode 2 except that if scanning is turned off while receiving a message, the Priority A  
channel is selected.  
Text  
Programs the text that is displayed while scanning with that scan list selected. If “OFF” is programmed, the text  
is not displayed. Instead, the alpha tag (or channel number) programmed for each channel is displayed as the  
channel is scanned. The characters and other information described for “TEXT” in Table 4-1 also applies to this  
text.  
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PROGRAMMING  
Table 4-5 Scan Function Screen Description (Continued)  
Parameter  
Description  
Stop Timer When Mode 2 or 3 above is programmed (priority scanning), this sets how often in seconds the priority channel  
is checked while receiving a message on some other channel.  
Resume This sets the scan resume delay in seconds. This is the time that elapses before scanning resumes after a  
Timer  
message is received.  
PWR ON If this function is programmed “On”, scanning starts automatically when transceiver power is turned on. The  
Scan  
“Hanger Action” parameter in Table 4-2 should also be programmed for “Scan” if power-on scan is used. If  
scanning halts to transmit a message, the timer selected for Auto Reset parameter in the channel screen (see  
Table 4-1) determines the delay before scanning resumes. See also Scan A/B function in Key Assign screen  
(Table 4-2), “Scan” column in 2-Tone Code CH screen (Table 4-6), “Timer A/B” in Common screen  
(Table 4-7), and “Fast/Slow Scan Timer” in Expert screen (Table 4-8).  
Auto CH The parameter is displayed only in the PMR (European) mode, and is used with the 5-tone option. If “On” is  
Call  
programmed, pressing the CALL key (1) starts scanning, (2) detects a non-busy channel, and (3) transmits the  
5-tone codes.  
Table 4-6 2-Tone Code Channel Screen Description  
NOTE: Optional  
2/5-Tone Module,  
P.N. 585-7500-  
026, is required to  
utilize the two-  
tone feature.  
Parameter  
Description  
Rx Freq Sets the frequencies for the first and second tones from 250-3300 Hz. The closest tone is selected.  
1st/2nd  
Group Call Programs if the 1st or 2nd tone is used for the group code.  
Text  
Programs the text that is displayed when a matched 2-tone is received. The characters and other information  
described for “TEXT” in Table 4-1 also applies to this text.  
Bell  
Selects the bell indicator condition when receiving a matched 2-tone. The following conditions can be  
programmed:  
Null - The bell indicator condition is not changed, even when a matched code is received.  
Off - The bell indicator goes off.  
On - The bell indicator appears until a key is pressed.  
Blink - The bell indicator blinks until a key is pressed.  
ANS  
EXO  
Turns the Answer Back function on and off. This function transmits a 1 kHz single tone for 2 seconds when  
receiving a matched 2-tone code.  
“On” activates an external alert such as a horn or buzzer when a matching 2-tone code is received. The activa-  
tion time is set by “EXO Timer” in the Rx Code Common screen (see below). The optional accessory cable is  
required to utilize this feature.  
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PROGRAMMING  
Table 4-6 2-Tone Code Channel Screen Description (Continued)  
Parameter  
Description  
Beep  
Emits (or turns off) the following beeps when receiving a matched 2-tone:  
Null - Beep emission (or non-emission) is retained even when receiving a matched 2-tone.  
Off - Repeater beep emission is turned off.  
Pi (Single) - One high beep once.  
PiPi (Single) - Two high beeps once.  
PiRo (Single) - One high and one low beep three times.  
Pi (Repeat) - One high beep repeated at selected intervals.  
PiPi (Repeat) - Two high beeps repeated at selected intervals.  
Auto Tx Sets the transceiver to the transmit condition (by activating the microphone PTT) when receiving a matched  
2-tone code. This transmit time can be set in the Auto Tx Timer parameter in the Rx Code Common screen (see  
below).  
Stun  
When a matched 2-tone is received, the transceiver is set to the following condition that is programmed:  
Off - The transceiver can be used continuously.  
Kill - The transceiver cannot be used. Reprogramming is required to re-activate the transceiver.  
Stun - The power-on password prompt is displayed. To use the transceiver, the correct password must be  
entered. See also “User Password” and “Pwr On Password” in Common screen (Table 4-7). Password entry is  
required regardless of the Pwr On Password setting.  
Scan  
When a matched 2-tone is received, scan is set to the following condition that is programmed:  
Null - Scan condition is not affected.  
Cancel - Scan is cancelled.  
Start - Scan is started.  
See also “Scan” key in Table 4-2 and “Power On Scan” in Table 4-5.  
Parameter  
Description  
Rx Code Common Screen  
Notone This item sets the acceptable period between 2 tones. When received tones are interrupted for longer than this  
Timer  
setting, the transceiver does not detect the code.  
Group  
Timer  
Programs the 2-tone decoding period in seconds. When the received tone is longer than this setting, the trans-  
ceiver detects the tone as a group code.  
EXO Timer When the EXO function is programmed “On” (see EXO above), the horn drive out pin of the optional accessory  
cable is grounded for this period when receiving a matched 2-tone code.  
Beep Repeat When “Repeat” is selected for the above “Beep” parameter, beeps are repeated at this period in seconds.  
Timer  
Auto Tx When the Auto TX function above is programmed “On”, the transceiver transmits for this set period when  
Timer  
receiving a matched 2-tone code.  
Tx Code Screen  
Code Type Selects the “Individual” or “Group” code type.  
1st/2nd Tone Sets the frequencies for the first and second tones from 250-3300 Hz. The closest tone is selected.  
Frequency  
1st/2nd Tone Sets the period of the first and second tones.  
Period  
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Table 4-7 Common Screen Description  
Parameter  
User  
Description  
Programs the password that must be entered at power on if the following “PWR ON Password” parameter is  
Password “On” or to cancel the “STUN” condition described in Table 4-6. Any four-digit number from 0000-9999 can be  
programmed. The password is entered as described in Section 3.3.2.  
Program Allows a comment to be programmed in the file for use in quickly identifying the contents of a transceiver.  
Comment When a transceiver is connected to the computer, the comment can be checked without reading all programmed  
data by selecting “Information” in the Program menu (see Section 4.4.4).  
AF Min Sets the minimum audio level that can be selected by the user. The level can be set in 32 steps with 0 the lowest  
Level  
level. This setting can be overridden by pressing the F1 in the power-on menu (see Section 3.3.4).  
SQL Level Sets the squelch level in up to 255 steps (0 sets the maximum unsquelched level). This adjustment can be more  
accurately made by pressing F4 in the power-on menu (see Section 3.3.4).  
Rx AF  
Switch  
This parameter can be used to disable the high-pass filter that removes the Call Guard (CTCSS/DTCS) signal  
from the audio. It should be programmed “On” if Call Guard squelch is used.  
Auto Reset These timer settings are used by the “Auto Reset” parameter in the channel screen (see Table 4-1). These times  
Timer A/B set the delay in returning to the mute mode or “Power On Scan” after receiving a message or pressing a key. To  
disable the Auto Reset function, set one of these timers to “Off” (0) and select it in the channel screen.  
Inactive This feature is available with the PMR (European) mode only. It sets the time in seconds to return to the  
Timer  
“Inaudible” mode after the “Audible” mode is selected. To turn off the inactive timer function, do not assign  
“Inactive” in the channel screen.  
TOT  
Timer  
Programs the time-out timer time in seconds. If the transmitter is keyed continuously for longer than this time,  
the transmitter is disabled. The time-out timer is enabled or disabled for each channel by the TOT parameter in  
the channel screen (see Table 4-1).  
TOTPenalty This programs the time in seconds that the transmitter is disabled by the time-out timer. The transmitter cannot  
Timer  
be keyed again until this time expires.  
TOT ID Out If this parameter is enabled, an DTMF ID code is automatically transmitted just before the time-out timer  
disables the transmitter. This ID code is set on the Log/ID line of the DTMF Autodial screen (see Table 4-3).  
TOT Beep If this parameter is enabled, warning beeps are transmitted 10 seconds before time out occurs.  
Lockout This is the time that the transmitter is disabled if the user attempts to transmit while in the lockout (Transmit  
Penalty Disable On Busy) condition. Transmitting is disabled for the Lockout Penalty Time even if the lockout condi-  
Timer  
tion is cleared. The lockout feature is programmed on the channel screen (see Table 4-1).  
CTCSS If CTCSS (tone Call Guard) signaling is programmed on the channel, this sets the length of the reverse burst  
Reverse that is transmitted when the PTT switch is released. The reverse burst prevents the “squelch tail” (noise burst) in  
Burst  
the transceiver receiving the signal.  
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PROGRAMMING  
Table 4-7 Common Screen Description (Continued)  
Parameter  
Description  
Power On This turns the password function on and off. When it is turned on, “PWoRd” is displayed when power is turned  
Password on and a four-digit password must be entered to enable the transceiver (see Section 3.3.2). The password is pro-  
grammed in “User Password” above. If the STUN function disables the transceiver (see Table 4-6), password  
input is required even if this parameter is programmed “Off”.  
Dealer  
Specifies the six-digit code that must be entered to access the following dealer set mode.  
Passcode  
Set Mode This enables/disables the Dealer Set Mode which allows one transceiver to clone another with identical infor-  
Access  
mation. If the transceiver will not be used for cloning, the dealer set mode is not used and this parameter should  
be programmed “Inhibit”.  
Transceiver Enables or inhibits the downloading of transceiver programming data using the programming software or when  
Data Out programming one transceiver with another (cloning). This prevents the unauthorized duplication of program-  
ming data. This does not inhibit overwriting of programming data, so reprogramming is still possible with this  
enabled.  
Table 4-8 Expert Screen Description  
Parameter  
Description  
Fast Scan Sets the period in seconds that each channel not programmed for CTCSS/DTCS (Call Guard) squelch is  
Timer  
scanned. NOTE: An appropriate time is set by default and if a time less than the default is programmed, busy  
channels may not be detected.  
Slow Scan Sets the period in seconds that each channel programmed for CTCSS/DTCS (Call Guard) squelch is scanned.  
Timer  
NOTE: An appropriate time is set by default and if a time less than the default is programmed, busy channels  
may not be detected.  
Tx DTCS Selecting “Inverse” selects the opposite transmit digital DTCS (Call Guard) code polarity specified for the  
Inverse channel (see Table 4-1) and selecting “Normal” does not change that setting. For example, if the channel is pro-  
grammed “I” (inverse), selecting “Inverse” here results in “Normal” DTCS. For DTCS signaling to work prop-  
erly, the polarity of the code in the transmitting and receiving transceivers must be the same.  
Rx DTCS Functions the same as the preceding “Tx DTCS Inverse” parameter to change the receive DTCS polarity.  
Inverse  
UserCTCSS A non-standard CTCSS (Call Guard) tone from 60.1-300.1 Hz can be programmed. It is then selected by pro-  
Freq.  
gramming “USER” for the CTCSS code in the channel screen (see Table 4-1).  
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PROGRAMMING  
Table 4-8 Expert Screen Description (Continued)  
Parameter  
Description  
Emer Sw Sets the period in seconds that the Emergency function key must be pressed to activate the emergency function.  
On Timer An emergency call is initiated by pressing the Emergency key for longer than this time.  
Emer Sw Sets the period in seconds that the Emergency function switch must be pressed to cancel an emergency call.  
Off Timer This must be done before the call is transmitted because once it is transmitted, it cannot be canceled.  
Emer  
Programs the delay and interval period in seconds for emergency calls. When the emergency switch is pressed  
Start/Repeat and held, the emergency call is transmitted after this delay period. If the Emergency Repeat function key is pro-  
grammed (see Table 4-2), the transceiver then transmits repeatedly at this interval until an “Emergency Cancel”  
code is received.  
Rx EXO Sets the condition of the horn output (pin 6) of the optional accessory cable in the receive mode. OFF = Horn  
drive control out, ON = Send (to ground when signal is received). One use of the “ON” condition may be for  
some type of simplified repeater system.  
Rx EXO When Rx EXO is programmed “On”, pin 6 of the optional accessory cable is grounded for this period when  
PTT  
receiving a signal. Normally this parameter is set to “0”.  
EXPTT Sets the period that the transmitter stays on after the receive signal disappears.  
Delay Timer  
Tone Mute Enables or disables the CTCSS/DTCS (Call Guard) function with an external PTT signal. “On” disables and  
EXPTT “Off” enables CTCSS/DTCS.  
Low Beep Sets the low beep tone frequency for 400 - 2998 Hz. The nearest available frequency is automatically selected.  
Frequency  
High Beep Sets the high beep tone frequency for 400 - 2998 Hz. The nearest available frequency is automatically selected.  
Frequency  
Character Special characters can be designed using this function by enabling the available 14 segments in any combina-  
Editor  
tion desired. The special characters created then can be entered when programming the “Text” parameters in the  
various screens. Up to 16 characters can be programmed and stored in locations A-P. To enter a special charac-  
ter when programming text, press the PgUp or PgDn keys to scroll through and select the desired character.  
Special characters can be displayed in positions 3-7 (1 and 2 must be standard characters).  
4.5 UNIQUE PMR (EUROPEAN) SCREENS  
Screen Menu - The LMR menu is described in Sec-  
tion 4.4.3, and the PMR version is shown below.  
4.5.1 GENERAL  
.
Selecting LMR or PMR in the Model menu (see  
Section 4.4.6) affects what parameters are displayed in  
some screens and also what additional screens are dis-  
played. Basically, selecting the LMR (U.S.A.) model  
displays parameters for the 2-tone option, and select-  
ing PMR (European) displays parameters for the  
5-tone option.  
NOTE: Optional 2/5-Tone Kit, Part No. 585-7500-  
026, is required to have the 5-tone function.  
Memory Channel Screen - The LMR version of this  
screen is shown in Table 4-1, and the PMR version is  
shown in Figure 4-2. Refer to on-line help for infor-  
mation on unique PMR parameters (press F1 with the  
parameter highlighted).  
4.5.2 UNIQUE PMR SCREENS  
The following menus and screens are different  
for LMR and PMR models:  
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PROGRAMMING  
The following screens selected in the preceding  
4.6 CLONING (PROGRAMMING ONE  
TRANSCEIVER WITH ANOTHER)  
Screen menu are unique to PMR models. Refer to on-  
line help for information on parameters in these  
screens.  
One transceiver can be used to program another  
with identical data. Replication Cable, Part No. 597-  
2002-200 is required to connect the transceivers  
together (see Table 1-1). The master (source) trans-  
ceiver must have the following Common screen (see  
Table 4-7) parameters programmed to perform  
cloning:  
Rx Code Channel - This screen is shown below and it  
programs the receive 5-tone code information.  
Transmit Data Out = Enabled. If this parameter is  
not enabled, the transceiver does not go into the  
clone mode. The programming of this parameter  
does not affect the ability to receive data. Therefore,  
it can be in either mode in the slave (target)  
transceiver.  
Set Mode Access = Enabled. This must be pro-  
grammed to allow the Dealer Set mode to be  
accessed so that cloning can be enabled.  
Tx Code Channel - This screen is shown below and it  
programs the transmit 5-tone code information.  
Dealer Passcode. This six-digit code must be  
known to enable the Dealer Set mode.  
Proceed as follows to program one transceiver  
with another:  
1. Select the Dealer Set mode in the Master (source)  
transceiver by turning power on with the F1 and up  
key pressed.  
2. The display then indicates “DEALR” which is the  
prompt to enter the six-digit Dealer Passcode. Enter  
User Tone Format - This screen is shown below and  
it programs special tone frequencies and the 5-tone  
format information.  
this code using the F1-F4 and down  
key. The  
numbers represented by each key are as follows.  
When the correct number is entered, “SETMODE is  
displayed. If six digits have been entered and this is  
not displayed, an incorrect number may have been  
entered. Repeat starting with step 1. Refer to Section  
3.3.2 for more information.  
Key  
F1  
0
5
F2  
1
6
F3  
2
7
F4  
3
8
Number  
Entered  
4
9
3. Press the F4 key to select the clone mode. The  
display should indicate “CLONE”.  
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PROGRAMMING  
4. Connect the master transceiver to the slave (target)  
transceiver by plugging the cloning cable into the  
microphone jack of each.  
6. When cloning is complete, CLONE is displayed by  
the master and CLONE OK by the slave.  
7. To clone another transceiver, repeat this procedure  
starting with step 4.  
5. Turn the slave transceiver on. Then momentarily  
press the POWER switch of the master transceiver  
to begin the data transfer.  
8. To return both the transceivers to normal operation,  
reconnect the microphone and cycle power.  
.
Figure 4-2 Memory Channel Screen (PMR Models)  
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PROGRAMMING  
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VHF (7610) CIRCUIT DESCRIPTION  
SECTION 5A VHF (7610) CIRCUIT DESCRIPTION  
NOTE: A VHF transceiver block diagram is located  
on page 8-1.  
frequency of the RF passband. This gives a wide band-  
width receiver good image response rejection. The  
diodes are controlled by the CPU IC1 via level  
controller IC5.  
5.1 VHF RECEIVER CIRCUIT  
5.1.1 ANTENNA SWITCHING CIRCUIT  
5.1.3 FIRST MIXER AND FIRST IF CIRCUITS  
The antenna switching circuit functions as a low-  
pass filter while receiving and a resonator circuit while  
transmitting. This prevents the transmit signal from  
entering the receiver in the transmit mode.  
The first mixer circuit converts the received sig-  
nal to a fixed frequency first IF signal of 31.050 MHz.  
The RF signal from the bandpass filter is applied to the  
first mixer Q13. This signal is mixed with the first LO  
signal from VCO Q7/Q8 and buffers Q6-Q4 to pro-  
duce the IF signal.  
Received signals enter the antenna connector and  
pass through a low-pass filter consisting of L1-L3, C1-  
C3, C8-C10, and C11-C13. The filtered signal is then  
fed through a quarter-wave type antenna switching cir-  
cuit formed by D13, D14, and L13 and applied to the  
receiver RF circuit.  
The 31.050 MHz first IF signal then passes  
through a pair of crystal filters (FI1A/B) which sup-  
press out-of-band signals. The filtered signal is then  
amplified by first IF amplifier Q14 and applied to sec-  
ond IF circuit IC3.  
5.1.2 RF CIRCUIT  
The RF circuit amplifies the frequencies that are  
within the receive band range and attenuates out-of-  
band signals.  
5.1.4 SECOND IF AND DEMODULATOR  
CIRCUITS  
The second mixer circuit converts the 31.050  
MHz first IF signal to a 450 kHz second IF signal. A  
double-conversion superheterodyne receiver like this  
improves the image rejection ratio and provides a  
stable receiver gain.  
The signal from the antenna switching circuit  
passes through attenuator D13/D14. The attenuator  
circuit functions only when the attenuator function is  
assigned to a programmable key. It is enabled to mini-  
mize RF amplifier distortion caused by excessively  
strong receive signals.  
FM IF system IC3 contains second mixer, limiter  
amplifier, quadrature detector, active filter and noise  
amplifier circuits (see Figure 5-1). The first IF signal  
from IF amplifier Q14 is applied to IC3, pin 16 which  
is the input to the second mixer section. The 31.050  
MHz first IF signal is mixed with the 30.600 MHz sec-  
ond LO signal to produce the 450 kHz second IF sig-  
nal. The PLL reference frequency of 15.300 MHz is  
doubled to produce the 30.600 MHz second LO signal.  
When the attenuator function is turned on, CPU  
IC1, pin 32 switches the voltage level of the “RF  
ATT” line from high to low and then controls the  
attenuator switch Q35. The D13/D14 current then  
increases and D13/D14 act as an attenuator.  
This signal is then applied to a two-stage tunable  
bandpass filter controlled by D16 and D17. The fil-  
tered signals are amplified by RF amplifier Q12 and  
applied to another two-stage bandpass filter controlled  
by D18-D21. These filters attenuate unwanted signals.  
The filtered signal is then applied to the first mixer  
Q13.  
The second IF signal is fed out of IC3 on pin 3  
and applied to ceramic filters FI3 and FI4 with narrow  
band operation or only FI4 with wideband operation  
(bypassing FI3). It is then fed back into IC3 on pin 5  
and applied to the limiter amplifier and quadrature  
detector. The quadrature detector demodulates the  
audio signal contained in the second IF signal. Com-  
ponents connected to pins 10 and 11 including X3  
The tunable bandpass filters controlled by D16-  
D21 employ varactor diodes to tune them to the center  
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VHF (7610) CIRCUIT DESCRIPTION  
Figure 5-1 Second IF System IC3 (VHF)  
Figure 5-2 Audio Switching and Amplifier Circuit (VHF)  
are part of the quadrature detector. The audio signal is  
fed out on pin 9 (IC3) and applied to the AF amplifier  
circuit.  
vided by R145 and C182. The audio signal is then  
applied to pin 16 of level controller IC5. This device  
allows the CPU to control the speaker volume level.  
The level controlled signal is fed out of IC5 on pin 15  
and applied to low-pass filter IC6b. It is then applied  
to AF switching circuit IC4 on pin 8, and the switched  
output is on pin 9. This signal is buffered by IC6d and  
then amplified by AF amplifier IC10 to provide drive  
to the speaker.  
5.1.5 AUDIO AMPLIFIER CIRCUIT  
The AF (audio frequency) amplifier circuit pro-  
vides drive to the speaker (a block diagram is shown in  
Figure 5-2). The audio signal from IC3, pin 9 is  
applied to AF amplifier IC7A and then fed to pin 1 of  
AF switching circuit IC4. The switched output signal  
on IC4, pin 2 is then applied to high-pass filter IC8A/  
B. The cut-off frequency of this filter is controlled by  
the “AFHPF” line. When “AFHPF” is high, the cut-off  
frequency is shifted higher to attenuate the Call Guard  
(CTCSS or DTCS) signals.  
5.1.6 RECEIVER MUTE CIRCUIT  
Noise Squelch  
The noise squelch circuit turns off the audio sig-  
nal when no RF signal is being received. The squelch  
circuit is controlled by the amount of noise present in  
the audio signal.  
The filtered output signal on IC8, pin 7 is applied  
to limiter IC7b and buffer IC7c. De-emphasis is pro-  
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VHF (7610) CIRCUIT DESCRIPTION  
Part of the AF signal from pin 9 of FM IF circuit  
IC3 is applied to pin 24 of level controller IC5. This  
device allows the CPU to control the squelch threshold  
level. The level-controlled output signal on pin 23 is  
applied to IC3, pin 8 which is the input of an internal  
filter (see Figure 5-1). Noise frequencies of about 10  
kHz are passed and then fed out on pin 7 and also  
applied to an internal noise detector.  
The signal is then fed to IC7b and IC7c which  
provide buffering and amplification. Deviation limit-  
ing is then provided by level controller IC5. The input  
to this device is pin 16 and the output is pin 15. The  
signal is then fed to splatter filter IC6b and switch IC4.  
The input is on pin 11 and the output is on pin 10. The  
modulation signal is then applied to the PLL circuit as  
“MOD”.  
The detected noise signal is rectified and fed out  
on pin 13 without smoothing. The noise signal (NOIS)  
is then applied to pin 19 of CPU IC1. The CPU ana-  
lyzes the noise condition and outputs the RMUT sig-  
nal via I/O expander IC11. This signal controls AF  
mute switches IC4a and c (see Figure 5-2).  
Narrow band/wideband switch Q21 is connected  
to the input of the splatter filter IC6b and switched by  
the “NWC” signal from the I/O expander IC11. When  
“NWC” is high, Q21 shifts the filter cut-off frequency  
for narrow band deviation selection.  
5.2.2 MODULATION CIRCUIT  
Call Guard (CTCSS/DTCS) Operation  
The microphone audio signal modulates the fre-  
quency of VCO Q7/Q8. The “MOD” signal from  
switch IC4, pin 10 changes the reactance of diode D9  
which frequency modulates the VCO frequency. The  
modulated VCO signal is amplified by buffer amplifi-  
ers Q6, Q5, and Q4 and applied to the transmit driver  
circuit.  
The tone Call Guard squelch circuit detects AF  
signals and opens the squelch only when receiving a  
signal containing a matching subaudible tone or code  
(CTCSS or DTCS). When tone squelch is in use and a  
signal with a mismatched or no subaudible tone is  
received, the tone squelch circuit mutes the AF signals  
even when noise squelch is open.  
5.2.3 TRANSMIT DRIVER CIRCUIT  
A portion of the audio signal from amplifier IC7a  
passes through low-pass filter Q5 in the front unit to  
remove voice signals. It is then applied to CPU IC1 on  
pin 97 via the “CTCIN” line. The CPU detects the  
CTCSS or DTCS signaling and controls the AF mute  
switch via I/O expander IC11.  
The transmit driver circuit amplifies the VCO  
oscillating signal to the level required by the power  
amplifier module. The RF signal from buffer amplifier  
Q4 passes through the T/R switch D5 and is amplified  
by the buffer-amplifiers Q3 and Q2 and driver Q1. The  
signal is then applied to the power amplifier module  
IC1.  
5.2 VHF TRANSMITTER CIRCUIT  
5.2.4 POWER AMPLIFIER MODULE  
5.2.1 MICROPHONE AMPLIFIER CIRCUIT  
The power amplifier module amplifies the driver  
signal to the output power level. The RF signal from  
the driver Q1 is applied to the power module which  
produces 45 watts of output power at the antenna jack.  
The microphone amplifier circuit amplifies the  
microphone audio signal to the level required by the  
modulation circuit and also provides pre-emphasis.  
The microphone audio signal is amplified by  
IC7d, with R172 and C295 on the output providing  
pre-emphasis. The microphone audio signal is then fed  
to switch IC4 on pin 4 and the switched output signal  
is on pin 3. This signal is then applied to high-pass fil-  
ter IC8a/b which attenuates frequencies in the Call  
Guard (CTCSS/DTCS) range. This is the same filter  
used for receive audio filtering.  
The amplified signal is fed through antenna  
switching circuit D3 and D4, a low-pass filter and  
APC detector, and is then applied to the antenna jack.  
The collector voltage of driver Q1 and the control  
voltage on pin 2 of the power module IC1 come from  
APC transistors Q17 and Q18. Transmit switch Q23  
turns off Q17 and Q18 when the transmitter is  
disabled.  
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VHF (7610) CIRCUIT DESCRIPTION  
Figure 5-3 PLL Circuit (VHF)  
5.2.5 APC CIRCUIT  
5.3 VHF PLL CIRCUIT  
The APC (Automatic Power Control) circuit pro-  
tects the power amplifier from damage caused by a  
mismatched antenna load, and provides a stable power  
output.  
5.3.1 PLL CIRCUIT  
The PLL (Phase-Locked-Loop) circuit provides a  
stable (± 5 PPM) receive first injection and transmit  
frequency. The PLL circuit consists of PLL circuit  
IC2, a loop filter, and reference oscillator. A block dia-  
gram of the PLL circuit is shown in Figure 5-3.  
Detector D2 detects forward signals, and D1  
detects reverse signals. The combined voltage is at  
minimum level when a matched antenna load of 50  
ohms is present and then increases as it becomes mis-  
matched. The detected voltage is applied to pin 9 of  
inverse amplifier IC6c. Power setting voltage T4 is  
applied to the other input (pin 10) as a reference.  
The signal from VCO (Voltage-Controlled Oscil-  
lator) Q7/Q8 is buffered by Q6 and Q5 and then  
applied to pin 2 of IC2. The prescaler in IC2 divides  
the VCO signal down so that it is within the frequency  
range of the programmable counter.  
When antenna impedance is mismatched, the  
detected voltage exceeds the power setting voltage.  
The output voltage on pin 8 then decreases which  
turns Q18 off slightly. Q17 then turns off slightly and  
lowers the voltage applied to the collector of Q1 and  
the power control input of IC1. This reduces the output  
power produced by these devices.  
A reference frequency generated by reference  
oscillator and controlled by crystal X1 is applied to pin  
15 of IC1. This signal is divided down by a program-  
mable divider and provides the reference input to the  
phase detector. When the VCO is oscillating at the  
correct frequency, the VCO-derived input to the phase  
detector is the same frequency as the reference input.  
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VHF (7610) CIRCUIT DESCRIPTION  
The phase detector determines the phase differ-  
ence between these signals and then produces output  
pulses on pin 8 which are filtered by the loop filter.  
This filter consists of R43-R45, C60, and C61. The  
output of this filter is the DC control voltage applied to  
the VCO. The phase detector increases or decreases  
this control voltage to change the VCO frequency.  
5.4.2 VHF CPU IC1 PORT ALLOCATION  
Pin Port  
Description  
No. Name  
1
VIN  
Input port for overvoltage detection from  
the vehicle power source.  
12  
SCK  
Outputs clock signal to EEPROM IC3,  
PLL IC2 (main unit) and expanders IC5,  
IC11 (main unit), etc.  
5.3.2 VCO CIRCUIT  
13  
14  
SI  
Input port for the data signal from  
EEPROM IC3, etc.  
The VCO signal is amplified by buffer amplifiers  
Q6 and Q4 and is then applied to T/R switch D5 and  
D6. The VCO receive injection signal is applied to  
first mixer Q13 via bandpass filter L23, L24, and  
C116-C118. Likewise, the VCO transmit signal is  
applied to driver Q1 via buffer amplifiers Q2 and Q3.  
Part of the Q6 output signal is fed back to PLL IC2 as  
described in the preceding section.  
SO  
Outputs data signal to EEPROM IC3, PLL  
IC2 (main unit) and expanders IC5, IC11  
(main unit).  
16  
17  
18  
CLIN  
Input port for cloning signal.  
CLOUT Output port for cloning signal.  
POSW Input for the POWER switch. Low =  
POWER switch pushed.  
19  
NOIS  
NOIS signal input port from the FM IF  
IC3 (main unit) for noise squelch  
operation.  
26  
32  
PTT  
Input port for the PTT switch. Low = PTT  
switch pushed.  
RFATT Outputs RF attenuator control signal to the  
attenuator switch (Q35 on main unit).  
Low = Attenuator function on.  
5.4 VHF IC PIN DESCRIPTIONS  
5.4.1 VHF POWER SUPPLY  
36  
37  
UNLK Input port for PLL unlock signal from the  
PLL IC2 (main unit). High = unlock.  
Line  
Description  
PWON Outputs control signal for the power  
switching circuit (Q25 on main unit) and  
5V regulator Q29, Q30 (main unit).  
VCC Unswitched input voltage to the transceiver.  
HV  
VCC supply voltage switched by Q25 and Q26.  
When the [POWER] switch is pressed, the CPU  
outputs the “PWON” control signal to this circuit  
to turn the HV supply on.  
38  
DIM  
Outputs control signal for LCD backlight.  
Low = LCD backlight on.  
39 EXTPTT Input port for the PTT switch from exter-  
nal connector J3 (main unit). Low = Exter-  
nal PTT switch on.  
CPU5V Common 5V supply for the CPU produced from  
the VCC supply by CPU5V regulator IC9. The  
circuit outputs this voltage regardless of the  
transceiver on-off condition.  
40  
DIM  
Input port for the LCD backlight control  
signal from external connector J3 (main  
unit). Low = External dimmer switch on.  
8V  
5V  
R5  
Common 8V supply produced from the HV  
supply by 8V regulator Q36.  
41  
42  
43  
PLST  
DAST  
EXST  
Outputs strobe signals for PLL IC2 (main  
unit).  
Common 5V supply produced from the VCC  
supply by 5V regulator Q29/Q30.  
Outputs strobe signals for level controller  
IC5 (main unit).  
Receive 5V supply produced by R5 regulator  
Q27 using the “T5C” signal from I/O expander  
IC IC11.  
Outputs strobe signals for the I/O  
expander IC11 (main unit).  
45, KS1,  
46 KS2  
47- KR3-  
50 KR10  
Output ports for the key matrix.  
T5  
Transmit 5V supply controlled by T5 regulator  
Q28 using the “T5C” signal from I/O expander  
IC11.  
Input ports for the key matrix.  
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VHF (7610) CIRCUIT DESCRIPTION  
5.4.4 VHF PORT EXPANDER IC11 (MAIN UNIT)  
Pin Port  
No. Name  
Description  
Pin  
No. Name  
Port  
51 BM  
Outputs control signal for beep mute cir-  
cuit Q10. High = Beep muted.  
Description  
4
T5C  
Outputs control signal for T5 and R5 regu-  
lator circuits Q27, Q28 (main unit). High =  
Transmitting.  
52- CTDA0- Output port for CTCSS/DTCS signals.  
54  
CTDA2  
55  
HANG Input port for the microphone hanger  
detection signal. Low = Microphone on  
hook.  
5
6
TMUT  
RM  
Outputs Tx mute switch Q19, Q23 (main  
unit) control signal. High = Tx muted.  
Outputs AF mute switch IC4 (main unit)  
control signal for the receiver circuit. High  
= No receive audio is emitted.  
90  
91  
MTONE Output port for beep audio while receiving  
and 2/5 tone signals while transmitting.  
TONED Outputs DTMF signals.  
7
MM  
Outputs MIC mute control signal. High =  
DTMF signals are output, etc.  
94- OPV3- Input port for option connector J2 state  
96  
OPV1  
(main unit).  
11  
HORNO Outputs external device control signal.  
High = Matched 2/5-tone signals are  
received.  
97  
CTCIN Input port for the CTCSS/DTCS IN  
decode signals.  
98  
99  
SD  
Input port for S-meter signal.  
Input port for PLL lock voltage.  
12  
AFON  
Outputs control signal for the AF amplifier  
regulator circuit. High = Squelch is open,  
etc.  
LVIN  
100 TEMP Input port for the transceiver’s internal  
temperature.  
13  
14  
AFHPF Outputs AF filter control signal. High =  
Filter out CTCSS or DTCS frequency.  
5.4.3 VHF I/O EXPANDER IC5 (MAIN UNIT)  
NWC  
Outputs receive/transmit passband width  
control signal. High = Narrow bandwidth  
is selected.  
Pin  
No. Name  
Port  
Description  
2, 3, T1-T3  
10  
Output tunable bandpass filter control  
signals.  
11  
T4  
Output port for tunable bandpass filter  
control signal while receiving and power  
control signal while transmitting.  
14  
REF  
Output port for reference frequency  
control voltage.  
November 1998  
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UHF (7640) CIRCUIT DESCRIPTION  
SECTION 5B UHF (7640) CIRCUIT DESCRIPTION  
NOTE: The UHF transceiver block diagram is located  
on page 8-6.  
The tunable bandpass filters controlled by D7-  
D10 employ varactor diodes to tune them to the center  
frequency of the RF passband. This gives a wide  
bandwidth receiver good image response rejection.  
The diodes are controlled by the CPU IC1 via level  
controller IC12.  
5.5 UHF RECEIVER CIRCUIT  
5.5.1 ANTENNA SWITCHING CIRCUIT  
The antenna switching circuit functions as a low-  
pass filter while receiving and a resonator circuit  
while transmitting. This prevents the transmit signal  
from entering the receiver in the transmit mode.  
5.5.3 FIRST MIXER AND FIRST IF CIRCUITS  
The first mixer circuit converts the received sig-  
nal to a fixed frequency first IF signal of 46.350 MHz.  
The RF signal from the bandpass filter is applied to  
the first mixer Q3. This signal is mixed with the first  
LO signal from VCO Q23 and buffers Q28 and Q30 to  
produce the IF signal.  
Received signals enter the antenna connector and  
pass through a low-pass filter consisting of L1-L3, C1,  
C2, and C9-C12. The filtered signal is then fed  
through a quarter-wave type antenna switching circuit  
formed by D4, D5, and L15 and applied to the  
receiver RF circuit.  
The 46.350 MHz first IF signal then passes  
through a pair of crystal filters (FI1A/B) which sup-  
press out-of-band signals. The filtered signal is then  
amplified by first IF amplifier Q4 and applied to  
second IF system IC1.  
5.5.2 RF CIRCUIT  
The RF circuit amplifies the frequencies that are  
within the receive band range and attenuates out-of-  
band signals.  
5.5.4 SECOND IF AND DEMODULATOR  
CIRCUITS  
The second mixer circuit converts the 46.350  
MHz first IF signal to a 450 kHz second IF signal. A  
double-conversion superheterodyne receiver like this  
improves the image rejection ratio and provides a  
stable receiver gain.  
The signal from the antenna switching circuit  
passes through attenuator D4/D5. The attenuator cir-  
cuit functions only when the attenuator function is  
assigned to a programmable key. It is enabled to mini-  
mize RF amplifier distortion caused by excessively  
strong receive signals.  
FM IF system IC1 contains second mixer, limiter  
amplifier, quadrature detector, active filter and noise  
amplifier circuits (see Figure 5-4). The first IF signal  
from IF amplifier Q4 is applied to IC1, pin 16 which  
is the input to the second mixer section. The 46.350  
MHz first IF signal is mixed with the 45.900 MHz  
second LO signal to produce the 450 kHz second IF  
signal. The PLL reference frequency of 15.300 MHz  
is tripled to produce the 45.900 MHz second LO  
signal.  
When the attenuator function is turned on, CPU  
IC1, pin 32 switches the voltage level of the “RF  
ATT” line from high to low and then controls the  
attenuator switch Q1. The D4/D5 current then  
increases and D4/D5 act as an attenuator.  
This signal is then applied to a two-stage tunable  
bandpass filter controlled by D7 and D8. The filtered  
signals are amplified by RF amplifier Q2 and applied  
to another two-stage bandpass filter controlled by D9  
and D10. These filters attenuate unwanted signals.  
The filtered signal is then applied to the first mixer  
Q3.  
The second IF signal is fed out of IC1 on pin 3  
and applied to ceramic filters FI2 and FI3 with narrow  
band operation or only FI2 with wideband operation  
(bypassing FI3). It is then fed back into IC1 on pin 5  
November 1998  
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UHF (7640) CIRCUIT DESCRIPTION  
Figure 5-4 Second IF System IC1 (UHF)  
Figure 5-5 Audio Switching and Amplifier Circuit (UHF)  
and applied to the limiter amplifier and quadrature  
The filtered output signal on IC6d, pin 14 is  
applied to pin 8 of AF switching circuit IC11. The  
switched output signal on IC11, pin 9 is then applied  
to pin 16 of level controller IC12. This device allows  
the CPU to control the speaker volume level. The vol-  
ume controlled output on pin 15 is then applied to pin  
2 of AF switching circuit IC11. The switched output  
on pin 1 is applied to pin 4 of de-emphasis circuit  
IC4a. The signal is then amplified by IC9 to provide  
drive to the speaker.  
detector. The quadrature detector demodulates the  
audio signal contained in the second IF signal. Com-  
ponents connected to pins 10 and 11 including X1  
are part of the quadrature detector. The audio signal is  
fed out on pin 9 (IC1) and applied to the AF amplifier  
circuit.  
5.5.5 AUDIO AMPLIFIER CIRCUIT  
The AF (audio frequency) amplifier circuit pro-  
vides drive to the speaker (see block diagram in Figure  
5-5). The audio signal from IC1, pin 9 is applied to AF  
amplifier IC7b and then fed to high-pass filter IC6c/  
IC6d. The cut-off frequency of this filter is controlled  
by the “AFHPF” line. When “AFHPF” is high, the  
cut-off frequency is shifted higher to attenuate the Call  
Guard (CTCSS or DTCS) signals.  
5.5.6 RECEIVER MUTE CIRCUIT  
Noise Squelch  
The noise squelch circuit turns off the audio sig-  
nal when no RF signal is being received. The squelch  
circuit is controlled by the amount of noise present in  
the audio signal.  
November 1998  
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UHF (7640) CIRCUIT DESCRIPTION  
Part of the AF signal from pin 9 of FM IF circuit  
IC1 is applied to pin 24 of level controller IC12. This  
device allows the CPU to control the squelch threshold  
level. The level-controlled output signal on pin 23 is  
applied to IC1, pin 8 which is the input of an internal  
filter (see Figure 5-4). Noise frequencies are passed  
and then fed out on pin 7 and also applied to an inter-  
nal noise detector.  
The output signal from IC11 on pin 10 is fed to  
pin 16 of level controller IC12. This device provides  
deviation control and is also used in the receive mode  
to provide volume control. The level controlled output  
on pin 15 is fed to pin 3 of switching circuit IC11. The  
switched output (MOD) on pin 4 is then applied to the  
PLL circuit (D21) where it frequency modulates the  
transmit signal.  
The detected noise signals are rectified and fed  
out on pin 13 without smoothing. The noise signal  
(NOIS) is then applied to pin 19 of CPU IC1. The  
CPU analyzes the noise condition and outputs the  
RMUT signal via I/O expander IC13. This signal con-  
trols AF mute switch IC11a (see Figure 5-5).  
Narrow band/wideband switch Q35 is connected  
to the input of the splatter filter IC7a and switched by  
the “NWC” signal from the I/O expander IC13. When  
“NWC” is high, Q35 shifts the filter cut-off frequency  
for narrow band deviation selection.  
5.6.2 MODULATION CIRCUIT  
Call Guard (CTCSS/DTCS) Operation  
The microphone audio signal modulates the fre-  
quency of transmit VCO Q25. The “MOD” signal  
from switch IC11, pin 4 changes the reactance of  
diode D21 and this modulates the frequency of trans-  
mit VCO Q25. The modulated VCO signal is ampli-  
fied by buffer amplifiers Q28 and Q30 and applied to  
the transmit driver circuit (Q21).  
The tone Call Guard squelch circuit detects AF  
signals and opens the squelch only when receiving a  
signal containing a matching subaudible tone or code  
(CTCSS or DTCS). When tone squelch is in use and a  
signal with a mismatched or no subaudible tone is  
received, the tone squelch circuit mutes the AF signals  
even when noise squelch is open.  
5.6.3 TRANSMIT DRIVER CIRCUIT  
A portion of the audio signal from amplifier IC7b  
passes through low-pass filter Q5 in the front unit to  
remove voice signals. It is then applied to CPU IC1 on  
pin 97 via the “CTCIN” line. The CPU detects the  
CTCSS or DTCS signaling and controls the AF mute  
switch via I/O I/O expander IC13.  
The transmit driver circuit amplifies the VCO  
oscillating signal to the level required by the power  
amplifier module. The RF signal from buffer amplifier  
Q30 passes through the T/R switch D18 and is ampli-  
fied by the buffer amplifiers Q21, Q20, and driver  
Q19. The signal is then applied to the power amplifier  
module IC5.  
5.6.4 POWER AMPLIFIER MODULE  
5.6 UHF TRANSMITTER CIRCUIT  
The power amplifier module amplifies the driver  
signal to the output power level. The RF signal from  
the driver Q19 is applied to the power module which  
produces 35 watts of output power at the antenna jack.  
5.6.1 MICROPHONE AMPLIFIER CIRCUIT  
The microphone amplifier circuit amplifies the  
microphone audio signal to the level required by the  
modulation circuit and also provides pre-emphasis.  
The amplified signal is fed through antenna  
switching circuit D3, a low-pass filter and APC detec-  
tor, and is then applied to the antenna jack. The collec-  
tor voltage of driver Q19 and the control voltage on  
pin 2 of the power module IC5 come from APC tran-  
sistors Q17 and Q18. Transmit switch Q16 turns off  
Q17 and Q18 when the transmitter is disabled.  
The microphone audio signal is amplified by  
IC8b and limited by IC8a. Pre-emphasis is provided  
by R152 and C180. The signal is then fed to splatter  
filter IC7a and then to pin 11 of switching circuit  
IC11.  
November 1998  
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UHF (7640) CIRCUIT DESCRIPTION  
Figure 5-6 PLL Circuit (UHF)  
5.6.5 APC CIRCUIT  
5.7 UHF PLL CIRCUIT  
The APC (Automatic Power Control) circuit pro-  
tects the power amplifier from damage caused by a  
mismatched antenna load, and provides a stable power  
output.  
5.7.1 PLL CIRCUIT  
The PLL (Phase-Locked-Loop) circuit provides a  
stable (± 2.5 PPM) receive first injection and transmit  
frequency. The PLL circuit consists of PLL circuit  
IC2, a loop filter, and reference oscillator. A block  
diagram of the PLL circuit is shown in Figure 5-6.  
One diode in D1 detects forward signals and the  
other detects reverse signals. The combined voltage is  
at minimum level when a matched antenna load of 50  
ohms is present and then increases as it becomes mis-  
matched. The detected voltage is applied to pin 6 of  
inverse amplifier IC4b. Power setting voltage T4 is  
applied to the other input (pin 5) as a reference.  
The signal from VCOs (Voltage-Controlled  
Oscillator) Q23 and Q25 is buffered by Q28 and Q29  
and then applied to pin 2 of IC10. The prescaler in  
IC10 divides the VCO signal down so that it is within  
the frequency range of the programmable counter.  
When antenna impedance is mismatched, the  
detected voltage exceeds the power setting voltage.  
The output voltage on pin 7 then decreases which  
turns Q17 off slightly. Transistor Q18 then turns off  
slightly and lowers the voltage applied to the collec-  
tor of Q19 and the power control input of IC5. This  
reduces the output power produced by these devices.  
A reference frequency generated by reference  
oscillator X2 is applied to pin 15 of IC1. This signal is  
divided down by a programmable divider and pro-  
vides the reference input to the phase detector. When  
the VCO is oscillating at the correct frequency, the  
VCO-derived input to the phase detector is the same  
frequency as the reference input.  
November 1998  
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UHF (7640) CIRCUIT DESCRIPTION  
The phase detector determines the phase differ-  
ence between these signals and then produces output  
pulses on pin 8 which are filtered by the loop filter.  
This filter consists of Q34, R180, R181, and C202-  
C204. The output of this filter is the DC control volt-  
age applied to the VCO. The phase detector increases  
or decreases this control voltage to change the VCO  
frequency.  
5.7.4 UHF CPU IC1 PORT ALLOCATION  
Pin Port  
Description  
No. Name  
1
VIN  
Input port for overvoltage detection from  
the vehicle power source.  
12  
SCK  
Outputs clock signal to EEPROM IC3,  
PLL IC10 (main unit) and expanders  
IC12, IC13 (main unit), etc.  
5.7.2 VCO CIRCUIT  
13  
14  
SI  
Input port for the data signal from  
EEPROM IC3, etc.  
Separate receive and transmit VCOs are used.  
The receive VCO consists of Q23/D20/D34 and the  
transmit VCO consists of Q25/D22/D33. The signal  
from these VCOs is amplified by buffer amplifiers  
Q28 and Q29 and is then applied to T/R switch D18  
and D19. The VCO receive injection signal is applied  
to first mixer Q3, and the VCO transmit signal is  
applied to driver Q21. Part of the Q28 output signal is  
amplified by Q29 and fed back to PLL IC10, pin 2 as  
described in the preceding section.  
SO  
Outputs data signal to EEPROM IC3, PLL  
IC10 (main unit) and expanders IC12,  
IC13 (main unit).  
16  
17  
18  
CLIN  
Input port for cloning signal.  
CLOUT Output port for cloning signal.  
POSW Input for the POWER switch. Low =  
POWER switch pushed.  
19  
NOIS  
NOIS signal input port from the FM IF  
IC1 (main unit) for noise squelch  
operation.  
26  
32  
PTT  
Input port for the PTT switch. Low = PTT  
switch pushed.  
RFATT Outputs RF attenuator control signal to the  
attenuator switch (Q1 on main unit).  
Low = Attenuator function on.  
5.7.3 UHF POWER SUPPLY  
Line  
Description  
36  
37  
38  
UNLK Input port for PLL unlock signal from the  
PLL IC10 (main unit). High = unlock.  
VCC Unswitched input voltage to the transceiver.  
PWON Outputs control signal for the power  
switching circuit (Q14/Q15 on main unit).  
HV  
VCC supply voltage switched by Q14 and Q15.  
When the [POWER] switch is pressed, the CPU  
outputs the “PWON” control signal to this circuit  
to turn the HV supply on.  
DIM  
Outputs control signal for LCD backlight.  
Low = LCD backlight on.  
39 EXTPTT Input port for the PTT switch from exter-  
nal connector J5 (main unit). Low =  
External PTT switch on.  
CPU5V Common 5V supply for the CPU produced from  
the VCC supply by CPU5V regulator IC3. The  
circuit outputs this voltage regardless of the  
transceiver on-off condition.  
40  
DIM  
Input port for the LCD backlight control  
signal from external connector J5 (main  
unit). Low = External dimmer switch on.  
8V  
5V  
R8  
Common 8V supply produced from the HV  
supply by 8V regulator IC2.  
41  
42  
43  
PLST  
DAST  
EXST  
Outputs strobe signals for PLL IC10 (main  
unit).  
Common 5V supply produced from the HV  
supply by 5V regulator Q12/Q13.  
Outputs strobe signals for level controller  
IC12 (main unit).  
Receive 8V supply produced by R8 regulator  
Q10/Q11 using the “TXC” signal from I/O  
expander IC13.  
Outputs strobe signals for the I/O  
expander IC13 (main unit).  
T8  
Transmit 8V supply controlled by T8 regulator  
Q8/Q9 using the “TMUT” signal from I/O  
expander IC13.  
45, KS1,  
46 KS2  
47- KR3-  
50 KR10  
Output ports for the key matrix.  
Input ports for the key matrix  
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UHF (7640) CIRCUIT DESCRIPTION  
5.7.6 UHF PORT EXPANDER IC13 (MAIN UNIT)  
Pin Port  
No. Name  
Description  
Pin  
No. Name  
Port  
51 BM  
Outputs control signal for beep mute cir-  
cuit Q10. High = Beep muted.  
Description  
4
TXC  
TMUT  
RM  
Outputs control signal for R8 regulator  
Q10/Q11 (main unit). High = Transmit  
mode.  
52- CTDA0- Output port for CTCSS/DTCS signals.  
54  
CTDA2  
55  
HANG Input port for the microphone hanger  
detection signal. Low = Microphone on  
hook.  
5
6
Outputs control signal for T8 regulator  
Q8/Q9 (main unit). High = Transmitter  
off.  
90  
91  
MTONE Output port for beep audio while receiving  
and 2/5 tone signals while transmitting.  
Outputs AF mute switch IC11(main unit)  
control signal for the receiver circuit. High  
= No receive audio is emitted.  
TONED Outputs DTMF signals.  
94- OPV3- Input port for option connector J4 state  
7
MM  
Outputs MIC mute control signal. High =  
DTMF signals are output, etc.  
96  
OPV1  
(main unit).  
97  
CTCIN Input port for the CTCSS/DTCS IN  
decode signals.  
11  
HORNO Outputs external device control signal.  
High = Matched 2/5-tone signals are  
received.  
98  
99  
SD  
Input port for S-meter signal.  
Input port for PLL lock voltage.  
LVIN  
12  
AFON  
Outputs control signal for the AF amplifier  
regulator circuit. High = Squelch is open,  
etc.  
100 TEMP Input port for the transceiver’s internal  
temperature.  
13  
14  
AFHPF Outputs AF filter control signal. High =  
Filter out CTCSS or DTCS frequency.  
NWC  
Outputs receive/transmit passband width  
control signal. High = Narrow bandwidth  
is selected.  
5.7.5 UHF I/O EXPANDER IC12 (MAIN UNIT)  
Pin  
No. Name  
Port  
Description  
2, 3, T1-T3  
10  
Output tunable bandpass filter control  
signals.  
11  
T4  
Output port for tunable bandpass filter  
control signal while receiving and power  
control signal while transmitting.  
14  
REF  
Output port for reference frequency  
control voltage.  
November 1998  
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ADJUSTMENT PROCEDURE  
SECTION 6 ADJUSTMENT PROCEDURE  
50 Ohm, 50W  
Load  
Wattmeter  
Frequency  
Monitor  
13.6 Volt, 17A  
Power Supply  
Programming Cable  
Part No. 585-7500-031  
4.0 Ohm Speaker Load  
Test Cable (Fabricated)  
Figure 6-1 Test Setup  
6.1 GENERAL  
Equipment  
Grade and Range  
FM deviation  
meter  
Freq range  
Measuring range  
DC-520 MHz  
0 to ±10 kHz  
6.1.1 SUGGESTED TEST EQUIPMENT  
Audio generator Freq range  
Output level  
67-3000 Hz  
1-500 mV  
The equipment that should be used to adjust this  
transceiver is listed in the following table.  
Attenuator  
Power atten.  
Capacity  
50 or 60 dB  
50W  
Standard Signal  
Generator (SSG) Output level  
Freq range  
146-520 MHz  
0.1 µV-32 mV  
(–127 to –17 dBm)  
Equipment  
Grade and Range  
DC power supply Output voltage  
Current capacity  
13.6 VDC  
15A  
DC voltmeter  
Oscilloscope  
Input impedance  
50k/V DC or  
better  
RF power meter Measuring range  
1-50 W  
Freq range  
Impedance  
SWR  
146-512 MHz  
50 ohms  
Less than 1.2:1  
Freq range  
Measuring range  
DC-20 MHz  
0.01-20V  
AC millivoltmeter Measuring range  
10 mV - 10V  
Frequency counter Freq range  
Freq accuracy  
0.1-500 MHz  
±1 ppm or better  
100 mV or better  
External Speaker Input Impedance  
Power Capacity  
4 Ω  
5 watts min.  
Sensitivity  
November 1998  
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ADJUSTMENT PROCEDURE  
Supply Voltage  
Internal Temp  
PLL Lock Voltage  
RSSI  
DTCS Bal Level  
Squelch Level  
Selected Channel Info  
IC5/IC12 D/A Outputs  
RF Power Output  
FM Deviation  
DTCS Balance  
Adjusts Current Vol Level  
Squelch Level  
Reference Frequency  
Rx Bandpass Filter  
NOTE: The above values for the various settings are examples only. Because of component  
tolerances, the optimum setting for each transceiver will probably be different.  
Figure 6-2 Screen Display Example  
Programming Cable  
Pin 2 (Clone)  
Pin 4 (PTT)  
Pin 8  
Pin 1  
PTT  
Sw  
To Transceiver  
Mic In  
To Computer  
Pin 7 (Ground)  
Pin 5 (MICE “+”)  
Pin 6 (MIC “–”)  
Figure 6-3 Test Cable Schematic  
6.1.2 TEST CHANNELS  
software described in Section 4. There are no fixed test  
channels or test modes selectable with this transceiver.  
NOTE: Before programming the test channels, down-  
load the current programming data in the transceiver  
and save it to a disk file so that it can be reloaded after  
the adjustments are complete.  
6.1.3 TEST CABLE  
The test cable shown Figure 6-3 in must be fabri-  
cated to perform transceiver alignment. This cable is  
used in place of the adapter cable shown in Figure 4-1.  
It is required because in addition to connecting the  
computer to the microphone jack, a transmit audio and  
keying (PTT) signal must be applied to that jack. If  
desired, Replication Cable, Part No. 597-2002-200,  
can be modified to provide the 8-pin modular-style  
connector required for this test cable.  
Test channels at the low, middle (VHF only), and  
high ends of the operating band, and High, Low1, and  
Low2 RF output power are required to perform the  
adjustments in this section. These test channels are  
listed in Tables 6-1 and 6-2, and they must be pro-  
grammed as regular channels using the programming  
November 1998  
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ADJUSTMENT PROCEDURE  
Table 6-1 VHF Test Frequencies  
Tx/Rx Freq  
(MHz)  
Call Guard  
Squelch  
Test Channel  
Power  
Low1  
Bandwidth [1]  
1
174.050  
146.050  
160.050  
160.050  
160.050  
160.050  
160.050  
160.050  
None  
Narrow or wide  
Narrow or wide  
Narrow or wide  
Narrow or wide  
Narrow or wide  
Narrow or wide  
Alternate  
2
Low1  
High  
None  
3
None  
4
Low2  
Low1  
Low1  
Low1  
Low1  
None  
5
None  
6
007N DTCS  
None  
7 [1]  
8 [1]  
007 DTCS  
Alternate  
[1] If the transceiver operates on only narrow or wide band channels, program only chan-  
nels 1-6, and program them for the type of channels used (narrow or wide band). If the  
transceiver operates on both wide and narrow band channels, program additional  
channels 7 and 8 for the other type of operation.  
Table 6-2 UHF Test Frequencies  
Call Guard  
Squelch  
Test Channel  
Power  
Bandwidth [1]  
400-430 MHz 450-470 MHz 470-490 MHz 488-512 MHz  
1
400.050  
430.050  
400.050  
400.050  
400.050  
400.050  
400.050  
450.050  
470.050  
450.050  
450.050  
450.050  
450.050  
450.050  
470.050  
490.050  
470.050  
470.050  
470.050  
470.050  
470.050  
490.050  
512.050  
490.050  
490.050  
490.050  
490.050  
490.050  
Low1  
Low1  
High  
None  
None  
None  
None  
Narrow or wide  
Narrow or wide  
Narrow or wide  
Narrow or wide  
2
3
4
Low2  
Low1  
Low1  
Low1  
5
007N DTCS Narrow or wide  
None Alternate  
007N DTCS Alternate  
6 [1]  
7 [1]  
[1] If the transceiver operates on only narrow or wide band channels, program only channels 1-5, and program them for  
the type of channels used (narrow or wide band). If the transceiver operates on both wide and narrow band channels,  
program additional channels 6 and 7 for the other type of operation.  
6.1.4 COMPUTER-AIDED TUNING  
3. Start the computer in the DOS mode. Make the cur-  
rent directory the ADJ subdirectory and start the  
program by typing the following:  
To make most adjustments described in the fol-  
lowing information, the computer setup used for pro-  
gramming (see Section 4) and special Adjust software  
are required. The Adjust software is included on the  
disk with the programming software in a separate sub-  
directory called ADJ. To set up the transceiver for use  
with this equipment, proceed as follows:  
ADJUST /X /Y  
X = A - VHF (normal crystal), B - UHF (TCXO)  
Y = 1 - Serial port 1, 2 - Serial port 2  
For example, if tuning a VHF transceiver and the  
programming cable is connected to serial port 2 of the  
computer, type ADJUST /A /2 (ENTER).  
1. Copy the Adjust software to the hard disk or a pro-  
gramming disk as described in Section 4.1.3  
2. Turn transceiver power on and connect the com-  
puter to the transceiver microphone jack using the  
programming cable and fabricated test cable  
4. The tune data in the connected transceiver is then  
downloaded and the adjustment screen shown in  
Figure 6-2 is displayed. The information displayed  
described in the preceding section (see Figure 6-1).  
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ADJUSTMENT PROCEDURE  
VHF ADJUSTMENTS  
in the upper part of the screen is for the currently  
selected channel.  
2. Select the MODEL menu and press the down arrow  
( ) key. Type “RESERVE” and press (ENTER).  
The “Reserved” indicator should begin flashing in  
the upper right corner of the screen.  
5. To move the cursor between the parameters on the  
left side of the bar graph, press the ↑ ↓ arrow keys.  
To change a parameter, press the , PgUp/PgDn,  
backspace, or spacebar keys. Refer to the individual  
adjustment descriptions for more information on the  
functions performed using this screen.  
3. Connect the computer to the transceiver that had the  
EEPROM replaced or is displaying the error (see  
Figure 4-1). Write the current data to that  
transceiver.  
6.1.5 REPROGRAMMING IF EEPROM IS RE-  
PLACED OR ERROR OCCURS  
6.2 PRELIMINARY SETUP  
When EEPROM IC3 is replaced or if the trans-  
ceiver displays an error message and beeps, the fol-  
lowing operation must be performed before making  
any adjustments.  
1. Preprogram the transceiver with test channels as  
described in Section 6.1.2.  
2. Connect the computer test setup using the test cable  
described in Sections 6.1.3 and 6.1.4. Start the  
program as described.  
1. Using the programming software, read (download)  
the data programmed in an exact same version of  
the transceiver. Refer to Section 4.4.4 for more  
information on reading data.  
3. Connect a DC power supply and a 50-ohm, 50-watt  
antenna load to the transceiver (see Section 6.1.1).  
VHF ADJUSTMENTS  
6.3 PLL ADJUSTMENT (VHF MODELS)  
5. Select the channel on the low end of the band (Test  
Ch. 2 - 146.050 MHz). The meter reading should be  
0.9 – 1.9 volt in both the transmit and receive  
modes. Replace the bottom cover.  
1. Remove the bottom cover by removing four screws.  
Connect a DC voltmeter to check point CP1 shown  
6.4 TRANSMITTER ADJUSTMENTS (VHF  
MODELS)  
2. Select the channel on the high end of the band  
(Test Ch. 1 - 174.050 MHz). This is done by press-  
ing the ↑ ↓ arrow keys to highlight “Memory CH”  
and then pressing the adjust keys (/, PgUp/  
PgDn, or spacebar/backspace) to select the channel.  
6.4.1 REFERENCE FREQUENCY  
1. Select the channel on the high end of the band (Test  
Ch. 1 - 174.050 MHz).  
3. Key the transmitter using the switch on the test  
cable and the meter reading should be 4.3 volts. If  
this voltage is significantly different, adjust L14 (it  
may be necessary to remove the VCO shield).  
2. Scroll down to “TXF SET” on the screen and press  
(Enter). Monitor the transmit signal with a fre-  
quency counter and key the transmitter using the  
test cable switch.  
4. Unkey the transmitter and the meter reading in the  
receive mode should be 3.3 – 4.3 volts.  
3. Adjust for the displayed frequency by pressing the  
computer adjust keys. Unkey the transmitter.  
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ADJUSTMENT PROCEDURE  
VHF ADJUSTMENTS (CONT’D)  
L14  
PLL lock voltage  
adjustment  
CP1  
PLL lock voltage  
check point  
Figure 6-4 VHF Adjustment Points  
4. Press (Enter) again to select the second adjust chan-  
nel. Key the transmitter and adjust for the displayed  
frequency. Unkey the transmitter and press (Enter)  
again to exit this function.  
puter adjust keys to set the following power. Unkey  
the transmitter. Repeat for the Low2 (Test Ch. 4)  
and Low1 (Test Ch. 5) power levels.  
High Power = 45 watts (Test Ch. 3)  
Low2 Power = 25 watts (Test Ch. 4)  
Low1 Power = 4.5 watts (Test Ch. 5)  
6.4.2 OUTPUT POWER ADJUST  
1. Select the high power channel in the middle of the  
band (Test Ch. 3 - 160.050 MHz). Connect a power  
meter to the antenna jack.  
6.4.3 FM DEVIATION ADJUST  
1. Connect an audio generator to the microphone  
audio input of the test cable (pin 5 shown in Figure  
6-3). Set the generator output for 1 kHz at 40 mV  
rms.  
2. Scroll to “Power (Hi)” on the screen and key the  
transmitter using the test cable switch. Use the com-  
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ADJUSTMENT PROCEDURE  
VHF ADJUSTMENTS (CONT’D)  
2. Select the low power channel in the middle of the  
band (Test Ch. 5 - 160.050 MHz). On the computer  
screen, scroll to “MOD N” if setting narrow band  
deviation or “MOD W” if setting wideband  
deviation.  
2. Connect an RF signal generator to the antenna jack.  
Set the output for the channel frequency at a level of  
3.2 µV (–97 dBm), modulated with 1 kHz at the  
following deviation:  
Wideband (30 kHz) Models - 3.5 kHz  
3. Monitor the transmit deviation with a communica-  
tions monitor set as follows: HPF = Off, LPF = 20  
kHz, De-Emphasis = Off, Detector = (P–P)/2.  
Narrowband (12.5 kHz) Models - 1.75 kHz  
3. Adjust the filters automatically or manually as  
follows:  
4. Key the transmitter using the test cable switch and  
set the following maximum deviation by pressing  
the adjust keys (/, PgUp/PgDn, or spacebar/  
backspace). Unkey the transmitter.  
Automatic Adjustment Method 1  
(Adjusts all filters)  
a. Select “BPF T1” on the screen and adjust for “0”.  
Repeat for T2 – T4. Reselect “BPF T1”.  
Wideband (30 kHz) Models - 4.2 kHz  
Narrow Band (12.5 kHz) Models - 2.1 kHz  
b. Press the F9 key and all filters are automatically  
adjusted for peak levels.  
5. If the transceiver operates on both narrow and wide  
band channels, select Test Ch. 7 and also adjust the  
deviation on that channel (see note in Table 6-1).  
Automatic Adjustment Method 2  
(Adjusts only one filter at a time)  
6.4.4 DTCS WAVEFORM ADJUST  
a. Select “BPF T1” and press F8 to automatically  
adjust it for a peak level.  
1. Select a channel in the middle of the band pro-  
grammed for DTCS (Test Ch. 8 - 160.050 MHz). On  
the computer screen, scroll to “DTCS N” if setting  
a narrow band channel or “DTCS W” if setting a  
wideband channel.  
b. Repeat for the other three filters.  
Manual Adjustment  
2. Key the transmitter and view the demodulated sig-  
nal on the CRT of a communications monitor.  
a. Connect a SINAD meter with a 4-ohm load to the  
external speaker jack (see Figure 6-4).  
3. Press the adjust keys on the computer so that the  
waveform appears as follows:  
b. Select “BPF T1” and press the adjust keys (/,  
PgUp/PgDn, or spacebar/backspace) to obtain  
minimum distortion.  
Set For  
Flat  
Waveform  
c. Repeat for the other three filters.  
4. If the transceiver operates on both narrow and wide  
band channels, select Test Ch. 8 and also set the  
waveform on that channel (see note in Table 6-1).  
6.5.2 SQUELCH ADJUST  
NOTE: The squelch level can also be set from the  
front panel as described in Section 3.3.6.  
6.5 RECEIVER ADJUSTMENTS (VHF MODELS)  
1. Select the channel on the low end of the operating  
band (Test Ch. 2 - 146.050 MHz).  
6.5.1 BANDPASS FILTER ADJUST  
1. Select the channel on the low end of the band (Test  
Ch. 2 - 146.050 MHz).  
2. Connect a SINAD meter with a 4-ohm load to the  
external speaker jack.  
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ADJUSTMENT PROCEDURE  
VHF ADJUSTMENTS (CONT’D)  
3. Connect an RF signal generator to the antenna jack.  
6.5.3 BEEP TONE LEVEL  
Set it to the channel frequency with an output mod-  
ulated with 1 kHz at the following deviation:  
This adjustment sets the volume of the beep tone  
that is heard when keys are pressed and at other times  
(if it is enabled). The computer setup used in the pre-  
ceding steps is not required for this adjustment.  
Proceed as follows:  
Wideband (30 kHz) Models - 3.5 kHz  
Narrowband (12.5 kHz) Models - 1.75 kHz  
4. Scroll to “SQL” on the computer screen and press  
the adjust keys to lower the displayed number so  
that the receiver unsquelches (the 1 kHz tone is  
heard). Also adjust the volume if necessary.  
1. Unplug any cable that may be plugged into the  
microphone jack and locate R60 inside this jack.  
(see Figure 6-5).  
5. Adjust the signal generator output to obtain 8 dB  
SINAD.  
2. Repeatedly press a front panel switch to enable the  
beep tone and adjust R60 for the desired level.  
6. Press the computer adjust keys to increase the dis-  
played number to the point where the receiver  
squelches. Then slowly adjust the number down-  
ward again until the receiver just unsquelches.  
R60  
Beep Tone  
Level Adj  
Figure 6-5 Beep Tone Level Adjustment  
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ADJUSTMENT PROCEDURE  
UHF ADJUSTMENTS  
NOTE: Perform the preliminary setup described in  
Section 6.2 before proceeding with these adjustments.  
frequency. Unkey the transmitter and press (Enter)  
again to exit this function.  
6.6 PLL ADJUSTMENT (UHF MODELS)  
6.7.2 OUTPUT POWER ADJUST  
1. Remove the bottom cover by removing four screws.  
Connect a DC voltmeter to check point CP1 shown  
1. Select the high power channel at the low end of the  
band (Test Ch. 3). Connect a power meter to the  
antenna jack.  
2. Select the channel at the low end of the band  
(Test Ch. 1). This is done by pressing the ↑ ↓ arrow  
keys to highlight “Memory CH” and then pressing  
the adjust keys (/, PgUp/PgDn, or spacebar/  
backspace) to select the channel.  
2. Scroll to “Power (Hi)” on the screen and key the  
transmitter using the test cable switch. Use the com-  
puter adjust keys to set the following power. Unkey  
the transmitter. Repeat for the Low2 (Test Ch. 4)  
and Low1 (Test Ch. 5) power levels.  
3. In the receive mode, the meter reading should be 1.5  
volts. If this voltage is significantly different, adjust  
L23 (it may be necessary to remove the shield).  
High Power = 35 watts  
Low2 Power = 20 watts  
Low1 Power = 3.5 watts  
4. Key the transmitter using the switch on the test  
cable and the meter reading also should be 1.5 volts.  
If this voltage is significantly different, adjust L26.  
6.7.3 FM DEVIATION ADJUST  
1. Connect an audio generator to the microphone  
audio input of the test cable (pin 5 shown in Figure  
6-3). Set the generator output for 1 kHz at 40 mV  
rms.  
5. Unkey the transmitter and select the channel on the  
high end of the band (Test Ch. 2). The meter reading  
in the receive and transmit modes should be 3.5 –  
5.5 volts. Replace the bottom cover.  
2. Select the low power channel at the low end of the  
band (Test Ch. 1). On the computer screen, scroll to  
“MOD N” if setting narrow band deviation or  
“MOD W” if setting wideband deviation.  
6.7 TRANSMITTER ADJUSTMENTS (UHF  
MODELS)  
3. Monitor the transmit deviation with a communica-  
tions monitor set as follows: HPF = Off, LPF = 20  
kHz, De-Emphasis = Off, Detector = (P–P)/2.  
6.7.1 REFERENCE FREQUENCY  
1. Select the low power channel on the high end of the  
band (Test Ch. 2).  
4. Key the transmitter using the test cable switch and  
set the following maximum deviation by pressing  
the adjust keys (/, PgUp/PgDn, or spacebar/  
backspace). Unkey the transmitter.  
2. Scroll down to “TXF SET” on the screen and press  
(Enter). Monitor the transmit signal with a fre-  
quency counter and key the transmitter using the  
test cable switch.  
Wideband (30 kHz) Models - 4.2 kHz  
Narrow Band (12.5 kHz) Models - 2.1 kHz  
3. Adjust for the displayed frequency by pressing the  
computer adjust keys. Unkey the transmitter.  
5. If the transceiver operates on both narrow and wide  
band channels, select Test Ch. 6 and also adjust the  
deviation on that channel (see note in Table 6-2).  
4. Press (Enter) again to select the second adjust chan-  
nel. Key the transmitter and adjust for the displayed  
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ADJUSTMENT PROCEDURE  
UHF ADJUSTMENTS (CONT’D)  
CP1  
PLL lock voltage  
check point  
L23  
PLL lock voltage  
adjustment  
L26  
PLL lock voltage  
adjustment  
Figure 6-6 UHF Adjustment Points  
4. Press the adjust keys on the computer so that the  
waveform appears as follows:  
6.7.4 DTCS WAVEFORM ADJUST  
1. Select the channel on the low end of the pro-  
grammed for DTCS code 007N (Test Ch. 5).  
Set For  
Flat  
Waveform  
2. On the computer screen, scroll to “DTCS N” if set-  
ting a narrow band channel or “DTCS W” if setting  
a wideband channel.  
5. If the transceiver operates on both narrow and wide  
band channels, select Test Ch. 7 and also set the  
waveform on that channel (see note in Table 6-2).  
3. Key the transmitter and view the demodulated sig-  
nal on the CRT of a communications monitor.  
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ADJUSTMENT PROCEDURE  
UHF ADJUSTMENTS (CONT’D)  
6.8 RECEIVER ADJUSTMENTS (UHF MODELS)  
6.8.2 SQUELCH ADJUST  
6.8.1 BANDPASS FILTER ADJUST  
NOTE: The squelch level can also be set from the  
front panel as described in Section 3.3.6.  
1. Select the channel on the low end of the band (Test  
Ch. 1).  
1. Select the channel on the low end of the operating  
band (Test Ch. 2). channel with LB models and the  
150.050 MHz channel with HB models.  
2. Connect an RF signal generator to the antenna jack.  
Set the output for the channel frequency at a level of  
3.2 µV (–97 dBm), modulated with 1 kHz at the  
following deviation:  
2. Connect a SINAD meter with a 4-ohm load to the  
external speaker jack.  
Wideband (25 kHz) Models - 3.5 kHz  
Narrowband (12.5 kHz) Models - 1.75 kHz  
3. Connect an RF signal generator to the antenna jack.  
Set it to the channel frequency with an output mod-  
ulated with 1 kHz at the following deviation:  
3. Adjust the filters automatically or manually as  
follows:  
Wideband (30 kHz) Models - 3.5 kHz  
Narrowband (12.5 kHz) Models - 1.75 kHz  
Automatic Adjustment Method 1  
(Adjusts all filters)  
4. Scroll to “SQL” on the computer screen and press  
the adjust keys to lower the displayed number so  
that the receiver unsquelches (the 1 kHz tone is  
heard). Also adjust the volume if necessary.  
a. Select “BPF T1” on the screen and adjust for “0”.  
Repeat for T2 – T4. Reselect “BPF T1”.  
5. Adjust the signal generator output to obtain 8 dB  
SINAD.  
b. Press the F9 key and all filters are automatically  
adjusted for peak levels.  
6. Press the computer adjust keys to increase the dis-  
played number to the point where the receiver  
squelches. Then slowly adjust the number down-  
ward again until the receiver just unsquelches.  
Automatic Adjustment Method 2  
(Adjusts only one filter at a time)  
a. Select “BPF T1” and press F8 to automatically  
adjust it for a peak level.  
6.8.3 BEEP TONE LEVEL  
b. Repeat for the other three filters.  
Manual Adjustment  
This adjustment sets the volume of the beep tone  
that is heard when keys are pressed and at other times  
(if it is enabled). The computer setup used in the pre-  
ceding steps is not required for this adjustment. Pro-  
ceed as follows:  
a. Connect a SINAD meter with a 4-ohm load to the  
external speaker jack (see Figure 6-6).  
1. Unplug any cable that may be plugged into the  
microphone jack and locate R60 inside this jack.  
(see Figure 6-5).  
b. Select “BPF T1” and press the adjust keys (/,  
PgUp/PgDn, or spacebar/backspace) to obtain  
minimum distortion.  
2. Repeatedly press a front panel switch to enable the  
beep tone and adjust R60 for the desired level.  
c. Repeat for the other three filters.  
November 1998  
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PARTS LIST  
SECTION 7 PARTS LIST  
7610 (VHF) Main Unit  
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&íéè &HUDPLFý&ìçíåý&+ýì+ýíèí%ð7ð$ íëëðêäíçðçìí  
&íéç &HUDPLFý&ìçíåý&+ýì+ýëëí-ð7ð$ íëëðêäíçðíçè  
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&íæé &HUDPLFý&ìçíåý&+ýì+ýíäí'ð7ð$ý íëëðêäíçðêéå  
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&íæä &HUDPLFý&ìçíåý&+ýì+ýèçí-ð7ð$ íëëðêäíçðçíì  
&íåí &HUDPLFý&ìçíåý&+ýì+ýìëí-ð7ð$ íëëðêäíçðíçç  
&íåë &HUDPLFý&ìçíåý&+ýì+ýêêí-ð7ð$ íëëðêäíçðíæí  
&íåè 7DQWDOXPý(&67ì$<ëëè5  
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&íåç &HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí  
&íåæ &HUDPý*50éëðçý&+ýìåí-ýèíí37 íëëðêäíçðæää  
&íåå &HUDPý*50éëðçý&+ýëëí-ýèíí37 íëëðêäíçðåìå  
&íåä &HUDPLFý&ìçíåý&+ýì+ýíæí'ð7ð$ íëëðêäíçðèäç  
&íäí &HUDPLFý&ìçíåý&+ýì+ýíéí%ð7ð$ íëëðêäíçðçíä  
&íäì &HUDPLFý&ìçíåý&+ýì+ýì5è%ð7ð$ý íëëðêäíçðíåæ  
&íäë &HUDPLFý&ìçíåý&+ýì+ýìíì-ð7ð$ý íëëðêäíçðíæë  
&íäê &HUDPLFý&ìçíåý&+ýì+ýíìí%ð7ð$ íëëðêäíçðíåè  
&íäè &HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí  
November 1998  
7-1  
Part No. 001-7600-001  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PARTS LIST  
75610 (VHF) Main Unit  
5HIý1Rï  
'HVFULSWLRQ  
3DUWý1Rï  
5HIý1Rï  
'HVFULSWLRQ  
3DUWý1Rï  
&íäç &HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí  
&íäæ &HUDPLFý&ìçíåý&+ýì+ýìíì-ð7ð$ý íëëðêäíçðíæë  
&íäå &HUDPLFý&ìçíåý&+ýì+ýíçí%ð7ð$ý íëëðêäíçðçìè  
&íää &HUDPLFý&ìçíåý&+ýì+ýì5è%ð7ð$ íëëðêäíçðíåæ  
&ìíí &HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí  
&ìíì &HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí  
&ìíë &HUDPLFý&ìçíåý-%ýì(ýìíê.ð7ð$ íëëðêäíçðíçê  
&ìíê &HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí  
&ìíé &HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí  
&ìíè &HUDPLFý&ìçíåý&+ýì+ýíéí%ð7ð$ý íëëðêäíçðçíä  
&ìíç &HUDPLFý&ìçíåý&+ýì+ýìíì-ð7ð$ý íëëðêäíçðíæë  
&ìíæ &HUDPLFý&ìçíåý&+ýì+ýíìí%ð7ð$ íëëðêäíçðíåè  
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&ììí &HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí  
&ìéè &HUDPLFý&ìçíåý&+ýì+ýìíí'ð7ð$ íëëðêäíçðèäå  
&ìéç &HUDPLFý&ìçíåý-%ýì(ýìíê.ð7ð$ íëëðêäíçðíçê  
&ìéæ &HUDPLFý&ìçíåý-%ýì(ýìíê.ð7ð$ íëëðêäíçðíçê  
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&ìèí &HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí  
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&ìèç 7DQWDOXPý(&67ì$<ëëè5  
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&ììè &HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí  
&ììç &HUDPLFý&ìçíåý&+ýì+ýìèí-ð7ð$ íëëðêäíçðíçæ  
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&ìêê &HUDPLFý&ìçíåý-%ýì&ýêêê.ð7ð$ íëëðêäíçðêèì  
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&ìêå &HUDPLFý&ìçíåý&+ýì+ýëëì-ð7ð$ íëëðêäíçðçíê  
&ìêä &HUDPLFý&ìçíåý&+ýì+ýëëì-ð7ð$ íëëðêäíçðçíê  
&ìéí &HUDPLFý&ìçíåý&+ýì+ýìíí'ð7ð$ íëëðêäíçðèäå  
&ìéì &HUDPLFý&ìçíåý&+ýì+ýìåí-ð7ð$ íëëðêäíçðíçå  
&ìéë &HUDPLFý&ìçíåý&+ýì+ýíéí%ð7ð$ íëëðêäíçðçíä  
&ìéê &HUDPLFý&ìçíåý&+ýì+ýìëí-ð7ð$ íëëðêäíçðíçç  
&ìéé &HUDPLFý&ìçíåý&+ýì+ýìèí-ð7ð$ íëëðêäíçðíçæ  
&ìçç 7DQWDOXPý(&67ì$<ëëè5  
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November 1998  
Part No. 001-7600-001  
7-2  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PARTS LIST  
7610 (VHF) Main Unit  
5HIý1Rï  
&ìäë &HUDPLFý&ìçíåý-%ýì(ýìíê.ð7ð$ íëëðêäíçðíçê  
&ìäé 7DQWDOXPý(&67ì$<ëëè5 íëëðêäíçðçëç  
'HVFULSWLRQ  
3DUWý1Rï  
5HIý1Rï  
'HVFULSWLRQ  
3DUWý1Rï  
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&ëéê &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
&ëéé &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
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November 1998  
7-3  
Part No. 001-7600-001  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PARTS LIST  
7610 (VHF) Main Unit  
5HIý1Rï  
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3DUWý1Rï  
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November 1998  
Part No. 001-7600-001  
7-4  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PARTS LIST  
7610 (VHF) Main Unit  
5HIý1Rï  
'HVFULSWLRQ  
3DUWý1Rï  
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November 1998  
7-5  
Part No. 001-7600-001  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PARTS LIST  
7610 (VHF) Main Unit  
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November 1998  
Part No. 001-7600-001  
7-6  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PARTS LIST  
7610 (VHF) Main Unit  
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3DUWý1Rï  
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'HVFULSWLRQ  
3DUWý1Rï  
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November 1998  
7-7  
Part No. 001-7600-001  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PARTS LIST  
7610 (VHF) Main Unit  
7640 (UHF) Main Unit  
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November 1998  
Part No. 001-7600-001  
7-8  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PARTS LIST  
7640 (UHF) Main Unit  
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&íèí &HUDPLFý&ìçíåý&+ýì+ýçåí-ð7ð$ íëëðêäíçðæäå  
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November 1998  
7-9  
Part No. 001-7600-001  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PARTS LIST  
7640 (UHF) Main Unit  
5HIý1Rï  
'HVFULSWLRQ  
3DUWý1Rï  
5HIý1Rï  
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&ìêì &HUDPLFý&ìçíåý-%ýì+ýéæì.ð7ð$ íëëðêäíçðíèä  
&ìêë &HUDPLFý&ëíìëý-%ýì$ýèçé.ð7ð$ íëëðêäíçðíæè  
&ìêê &HUDPLFý&ìçíåý-)ýì&ýìíé=ð7ð$ íëëðêäíçðíæç  
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November 1998  
Part No. 001-7600-001  
7-10  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PARTS LIST  
7640 (UHF) Main Unit  
5HIý1Rï  
'HVFULSWLRQ  
3DUWý1Rï  
5HIý1Rï  
'HVFULSWLRQ  
3DUWý1Rï  
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November 1998  
7-11  
Part No. 001-7600-001  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PARTS LIST  
7640 (UHF) Main Unit  
5HIý1Rï  
'HVFULSWLRQ  
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&ëçç &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
&ëçæ &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
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&ëæí &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
&ëæì &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
&ëæë &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
&ëæê &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
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&êìí &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
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&êìê &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
&êìé &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
&êìè &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
&êìç &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
&êìæ &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
&êìå &HUDPLFý&ìçíåý&+ýì+ýìíí'ð7ð$ íëëðêäíçðèäå  
&êìä &HUDPLFý&ìçíåý-%ýì+ýéæë.ð7ð$ íëëðêäíçðíçë  
&êëì &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
&êëë &HUDPLFý&ìçíåý-)ýì&ýëëé=ð7ð$ íëëðêäíçðäìå  
&êëê &HUDPLFý&ìçíåý&+ýì+ýìíí'ð7ð$ íëëðêäíçðèäå  
&êëé &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
&êëè &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
November 1998  
Part No. 001-7600-001  
7-12  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PARTS LIST  
7640 (UHF) Main Unit  
5HIý1Rï  
'HVFULSWLRQ  
3DUWý1Rï  
5HIý1Rï  
'HVFULSWLRQ  
'LRGHý0$ìììýõ7;ô  
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&êëæ &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
&êëå &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
&êëä &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
&êêí &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
&êêì &HUDPLFý&ìçíåý-%ýì+ýéæì.ð7ð$ íëëðêäíçðíèä  
&êêë &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
&êêê &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
&êêé &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
&êêè &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
&êêç &HUDPLFý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí  
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&êéì &HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí  
&êéë &HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí  
&êéê &HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí  
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November 1998  
7-13  
Part No. 001-7600-001  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PARTS LIST  
7640 (UHF) Main Unit  
5HIý1Rï  
'HVFULSWLRQ  
3DUWý1Rï  
5HIý1Rï  
'HVFULSWLRQ  
3DUWý1Rï  
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íëëðêäíçðåæê  
íëëðêäíçðäæç  
íëëðêäíçðåçä  
íëëðêäíçðååç  
íëëðêäíçðååæ  
íëëðêäíçðååä  
íëëðêäíçðååè  
íëëðêäíçðååç  
íëëðêäíçðååé  
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&RLOý/$ðêåë  
íëëðêäíçðäèì  
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03ìì ëíèçý6SRQJHý  
03ìë ëíèçý0ðSODWH  
&RLOý/41ýì$ýìè1-íé  
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&RLOý(/-1&ý5ìë.ð)  
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&RLOý(/-1&ý5ìå.ð)  
&RLOý/$ðëêëýõéäíðèìëý0+]ô  
&RLOý/$ðëéëýõRWKHUýEDQGVô  
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&RLOý(/-5(ýëë1*ð)  
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&RLOý(/-5(ýìå1*ð)  
03ìê ëíèçý6SRQJHýõéííðéêíý0+]ýRQO\ôý íëëðêäíçðååç  
4íì  
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7UDQVLVWRUý'7$ìéé(8ý7ìíæ  
6ï)(7ýê6.ëæëðõ7;ô  
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íëëðêäíçðæçä  
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íëëðêäíìðêéê  
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íëëðêäíçðåèí  
íëëðêäíçðèçç  
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íëëðêäíìðêéê  
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íëëðêäíçðäåë  
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íëëðêäíçðíêå  
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7UDQVLVWRUýë6&éëìèð2ýõ7(åè5ô  
7UDQVLVWRUýë6&éíåìý7ìíæý5  
7UDQVLVWRUý'7$ìéé(8ý7ìíæ  
7UDQVLVWRUýë6'ìççéý7ìíí4  
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7UDQVLVWRUýë6'ìççéý7ìíí4  
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0+]ýRQO\ô  
7UDQVLVWRUý'7&ììé(8ý7ìíæ  
7UDQVLVWRUý'7&ìéé(8ý7ìíæ  
7UDQVLVWRUýë6&éíåìý7ìíæý5  
7UDQVLVWRUýë6%ììéêý6  
&RLOý(/-5(ýëë1*ð)ýõRWKHUýEDQGVô íëëðêäíçðéäè  
/ëë  
/ëê  
&RLOý(/-1&ý5èç.ð)  
íëëðêäíçðåêê  
íëëðêäíçðçèè  
&RLOý0&ìèëð(èèå$1$ð  
ìíííèì 3ê  
7UDQVLVWRUýë6&éæíêð7ìý6(  
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7UDQVLVWRUýë6&èìíæð2ýõ7(åè5ô  
7UDQVLVWRUýë6&éíåìý7ìíæý5  
7UDQVLVWRUýë6&èììíð2ýõ7(åè5ô  
7UDQVLVWRUý'7&ììé(8ý7ìíæ  
7UDQVLVWRUýë6&èììíð2ýõ7(åè5ô  
7UDQVLVWRUý'7&ììé(8ý7ìíæ  
7UDQVLVWRUý'7&ìéé(8ý7ìíæ  
7UDQVLVWRUýë6&èìíæð2ýõ7(åè5ô  
7UDQVLVWRUýë6&èìíæð2ýõ7(åè5ô  
7UDQVLVWRUýë6&èììíð2ýõ7(åè5ô  
7UDQVLVWRUýë6&éíåìý7ìíæý5  
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íëëðêäíçðäèç  
íëëðêäíçðçèè  
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ìíííèì 3êýõéííðéæíý0+]ô  
/ëç  
&RLOý0&ìèëð(èèå$1$ðìíííèíý íëëðêäíçðçèæ  
õéæíðèìëý0+]ô  
/ëæ  
/ëå  
/êí  
/êì  
/êë  
/êê  
/êé  
&RLOý(/-)&ýì5í.ð)  
&RLOý(/-5(ýëæ1*ð)  
&RLOý(/-5(ýëæ1*ð)  
&RLOý(/-5(ýìå1*ð)  
&RLOý(/-1&ý5èç.ð)  
&RLOý(/-1&ý5èç.ð)  
&RLOý(/-5(ýìå1*ð)  
íëëðêäíçðäçé  
íëëðêäíçðäçæ  
íëëðêäíçðäçæ  
íëëðêäíçðäçë  
íëëðêäíçðåêê  
íëëðêäíçðåêê  
íëëðêäíçðäçë  
03íì ìæíèý9&2ýFDVHðìý  
03íë ìæíèý9&2ýFRYHUðìý  
03íê ëíèèý)LOWHUýFDVHý  
íëëðêäíçðäæé  
íëëðêäíçðäæè  
íëëðêäíçðååí  
7UDQVLVWRUýë6&éíåìý7ìíæý5  
7UDQVLVWRUý'7&ìéé(8ý7ìíæ  
November 1998  
Part No. 001-7600-001  
7-14  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PARTS LIST  
7640 (UHF) Main Unit  
5HIý1Rï  
'HVFULSWLRQ  
3DUWý1Rï  
5HIý1Rï  
'HVFULSWLRQ  
3DUWý1Rï  
4êæ  
4êå  
4êä  
4éí  
4éì  
4éë  
4éé  
4éè  
4éç  
7UDQVLVWRUý'7&ìéé(8ý7ìíæ  
7UDQVLVWRUý'7&ìéé(8ý7ìíæ  
7UDQVLVWRUý'7&ìéé(8ý7ìíæ  
)(7ýë6-ìééð*5ýõ7(åè5ô  
7UDQVLVWRUý'7&êçê(.ý7ìéæ  
7UDQVLVWRUý'7&ìéé(8ý7ìíæ  
7UDQVLVWRUý'7&ìéé(8ý7ìíæ  
7UDQVLVWRUý'7$ìéé(8ý7ìíæ  
7UDQVLVWRUý'7$ìéé(8ý7ìíæ  
íëëðêäíçðíêå  
íëëðêäíçðíêå  
íëëðêäíçðíêå  
íëëðêäíçðææê  
íëëðêäíçðææë  
íëëðêäíçðíêå  
íëëðêäíçðíêå  
íëëðêäíìðêèê  
íëëðêäíìðêèê  
5íêå 5HVý(5-ê*(<-ýéæêý9ýõéæýNýRKPô íëëðêäíçðìæì  
5íêä 5HVý(5-ê*(<-ýéæêý9ýõéæýNýRKPô íëëðêäíçðìæì  
5íéí 5HVý(5-ê*(<-ýëëëý9ýõëïëýNýRKPô íëëðêäíçðìèæ  
5íéì 5HVý(5-ê*(<-ýéæìý9ýõéæíýýRKPô íëëðêäíçðìèí  
5íéë 5HVý(5-ê*(<-ýìíéý9ýõìííýNýRKPô íëëðêäíçðìæè  
5íéé 5HVý(5-ê*(<-ýåëìý9ýõåëíýýRKPô íëëðêäíçðìèê  
5íéè 5HVý(5-ê*(<-ýêêéý9ýõêêíýNýRKPô íëëðêäíçðìåí  
5íéç 5HVý(5-ê*(<-ýìíéý9ýõìííýNýRKPô íëëðêäíçðìæè  
5íéæ 5HVý(5-ê*(<-ýéæíý9ýõéæýýRKPô íëëðêäíçðìéì  
5íéå 5HVý(5-ê*(<-ýìèëý9ýõìïèýNýRKPô íëëðêäíçðìèè  
5íéä 5HVý(5-ê*(<-ýìèêý9ýõìèýNýRKPô íëëðêäíçðìçè  
5íèí 5HVý(5-ê*(<-ýëëêý9ýõëëýNýRKPô íëëðêäíçðìçæ  
5íèì 5HVý(5-ê*(<-ýìëêý9ýõìëýNýRKPô íëëðêäíçðìçé  
5íèë 5HVý(5-ê*(<-ýëëêý9ýõëëýNýRKPô íëëðêäíçðìçæ  
5íèê 5HVý(5-ê*(<-ýìèêý9ýõìèýNýRKPô íëëðêäíçðìçè  
5íèé 5HVý0&5ìí(=+-ýéïæýNýRKPýõéæëô íëëðêäíçðäåå  
5íèè 5HVý0&5ìí(=+-ýéïæýNýRKPýõéæëô íëëðêäíçðäåå  
5íèç 5HVý0&5ìí(=+-ýéïæýNýRKPýõéæëô íëëðêäíçðäåå  
5íèæ 5HVý0&5ìí(=+-ýéïæýNýRKPýõéæëô íëëðêäíçðäåå  
5íèå 5HVý(5-ê*(<-ýéæëý9ýõéïæýNýRKPô íëëðêäíçðìçí  
5íèä 5HVý(5-ê*(<-ýìíêý9ýõìíýNýRKPô íëëðêäíçðìçê  
5íçí 5HVý(5-ê*(<-ýéæìý9ýõéæíýýRKPô íëëðêäíçðìèí  
5ííì 5HVý0&5ìí(=+-ýìííýNýRKPýõìíéô íëëðêäíçðäåê  
5ííë 5HVý(5-ê*(<-ýì5íý9ýõìýýRKPô íëëðêäíçðçåå  
5ííê 5HVý(5-ê*(<-ýìíìý9ýõìííýýRKPô íëëðêäíçðìéê  
5ííé 5HVý0&5ìí(=+-ýéæýýRKPýõéæíô íëëðêäíìðæåì  
5ííè 5HVý(5-ê*(<-ýìíìý9ýõìííýýRKPô íëëðêäíçðìéê  
5ííç 5HVý(5-ê*(<-ýìíìý9ýõìííýýRKPô íëëðêäíçðìéê  
5ííæ 5HVý0&5ìí(=+-ýéæýýRKPýõéæíô íëëðêäíìðæåì  
5ííå 5HVý0&5èí-=+-ýëëíýýRKPýõëëìô íëëðêäíçðääè  
5ííä 5HVý0&5èí-=+-ýëëíýýRKPýõëëìô íëëðêäíçðääè  
5íìí 5HVý(5-ê*(<-ýéæëý9ýõéïæýNýRKPô íëëðêäíçðìçí  
5íìì 5HVý(5-ê*(<-ýëëéý9ýõëëíýNýRKPô íëëðêäíçðìæå  
5íìë 5HVý(5-ê*(<-ýìíêý9ýõìíýNýRKPô íëëðêäíçðìçê  
5íìê 5HVý(5-ê*(<-ýëëéý9ýõëëíýNýRKPô íëëðêäíçðìæå  
5íìé 5HVý(5-ê*(<-ýìíêý9ýõìíýNýRKPô íëëðêäíçðìçê  
5íìè 5HVý(5-ê*(<-ýéæêý9ýõéæýNýRKPô íëëðêäíçðìæì  
5íìç 5HVý(5-ê*(<-ýéæêý9ýõéæýNýRKPô íëëðêäíçðìæì  
5íìæ 5HVý(5-ê*(<-ýìíéý9ýõìííýNýRKPô íëëðêäíçðìæè  
5íìå 5HVý(5-ê*(<-ýçåíý9ýõçåýýRKPô íëëðêäíçðäåè  
5íìä 5HVý(5-ê*(<-ýìííý9ýõìíýýRKPô íëëðêäíçðìêå  
5íëí 5HVý(5-ê*(<-ýëëëý9ýõëïëýNýRKPô íëëðêäíçðìèæ  
5íëì 5HVý(5-ê*(<-ýëëéý9ýõëëíýNýRKPô íëëðêäíçðìæå  
5íëë 5HVý(5-ê*(<-ýìíêý9ýõìíýNýRKPô íëëðêäíçðìçê  
5íëê 5HVý(5-ê*(<-ýëëéý9ýõëëíýNýRKPô íëëðêäíçðìæå  
5íëé 5HVý(5-ê*(<-ýìíêý9ýõìíýNýRKPô íëëðêäíçðìçê  
5íëè 5HVý(5-ê*(<-ýìíéý9ýõìííýNýRKPô íëëðêäíçðìæè  
5íëæ 5HVý(5-ê*(<-ýëæìý9ýõëæíýýRKPô íëëðêäíçðìéæ  
5íëå 5HVý(5-ê*(<-ýìåíý9ýõìåýýRKPô íëëðêäíçðìéí  
5íëä 5HVý(5-ê*(<-ýëæìý9ýõëæíýýRKPô íëëðêäíçðìéæ  
5íêí 5HVý(5-ê*(<-ýçåíý9ýõçåýýRKPô íëëðêäíçðäåè  
5íêì 5HVý(5-ê*(<-ýëëíý9ýõëëýýRKPô íëëðêäíçðçåè  
5íêë 5HVý(5-ê*(<-ýìíìý9ýõìííýýRKPô íëëðêäíçðìéê  
5íêê 5HVý(5-ê*(<-ýêêìý9ýõêêíýýRKPô íëëðêäíçðêåä  
5íêé 5HVý(5-ê*(<-ýêêìý9ýõêêíýýRKPô íëëðêäíçðêåä  
5íêè 5HVý(5-ê*(<-ýìëéý9ýõìëíýNýRKPô íëëðêäíçðìæç  
5íêç 5HVý(5-ê*(<-ýìíìý9ýõìííýýRKPô íëëðêäíçðìéê  
5íêæ 5HVý(5-ê*(<-ýìëëý9ýõìïëýNýRKPô íëëðêäíçðêäí  
5íçì 5HVý(5-ê*(<-ýëëêý9ýõëëýNýRKPôý íëëðêäíçðìçæ  
õéäíðèìëý0+]ýRQO\ô  
5HVý(5-ê*(<-ýìåêý9ýõìåýNýRKPôý íëëðêäíçðìçç  
õRWKHUýEDQGVô  
5íçë 5HVý(5-ê*(<-ýìåêý9ýõìåýNýRKPô íëëðêäíçðìçç  
5íçê 5HVý(5-ê*(<-ýìíèý9ýõìý0ýRKPô íëëðêäíçðìåé  
5íçé 5HVý(5-ê*(<-ýìèéý9ýõìèíýNýRKPô íëëðêäíçðêäë  
5íçè 5HVý(5-ê*(<-ýçåêý9ýõçåýNýRKPô íëëðêäíçðìæê  
5íçç 5HVý(5-ê*(<-ýçåêý9ýõçåýNýRKPô íëëðêäíçðìæê  
5íçæ 5HVý(5-ê*(<-ýéæëý9ýõéïæýNýRKPô íëëðêäíçðìçí  
5íçå 5HVý(5-ê*(<-ýìëëý9ýõìïëýNýRKPô íëëðêäíçðêäí  
5íçä 5HVý(5-ê*(<-ýìèìý9ýõìèíýýRKPô íëëðêäíçðìéè  
5íæí 5HVý0&5ìí(=+-ýëïëýýRKPýõë5ëô íëëðêäíçðåéæ  
5íæì 5HVý0&5ìí(=+-ýëëýýRKPýõëëíôý íëëðêäíçðåéå  
õéäíðèìëý0+]ýRQO\ô  
5HVý0&5ìí(=+-ýêêýýRKPýõêêíôý íëëðêäíçðääë  
õRWKHUýEDQGVô  
5íæë 5HVý0&5ìí(=+-ýëæýýRKPýõëæíôý íëëðêäíçðääê  
õéäíðèìëý0+]ýRQO\ô  
5HVý0&5ìí(=+-ýêêýýRKPýõêêíôý íëëðêäíçðääë  
õRWKHUýEDQGVô  
5íæê 5HVý(5-ê*(<-ýëëëý9ýõëïëýNýRKPô íëëðêäíçðìèæ  
November 1998  
7-15  
Part No. 001-7600-001  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PARTS LIST  
7640 (UHF) Main Unit  
5HIý1Rï  
'HVFULSWLRQ  
3DUWý1Rï  
5HIý1Rï  
'HVFULSWLRQ  
3DUWý1Rï  
5íæé 5HVý(5-ê*(<-ýëëìý9ýõëëíýýRKPô íëëðêäíçðëåå  
5íæè 5HVý(5-ê*(<-ýìíìý9ýõìííýýRKPô íëëðêäíçðìéê  
5íæç 5HVý(5-ê*(<-ýëëíý9ýõëëýýRKPô íëëðêäíçðçåè  
5íææ 5HVý(5-ê*(<-ýêêëý9ýõêïêýNýRKPô íëëðêäíçðìèä  
5íæå 5HVý(5-ê*(<-ýìèëý9ýõìïèýNýRKPô íëëðêäíçðìèè  
5íæä 5HVý(5-ê*(<-ýëëíý9ýõëëýýRKPô íëëðêäíçðçåè  
5íåí 5HVý(5-ê*(<-ýëëìý9ýõëëíýýRKPô íëëðêäíçðëåå  
5íåì 5HVý(5-ê*(<-ýéæëý9ýõéïæýNýRKPô íëëðêäíçðìçí  
5íåë 5HVý(5-ê*(<-ýëæëý9ýõëïæýNýRKPô íëëðêäíçðìèå  
5íåê 5HVý(5-ê*(<-ýéæëý9ýõéïæýNýRKPô íëëðêäíçðìçí  
5íåé 5HVý(5-ê*(<-ýìíëý9ýõìýNýRKPô íëëðêäíçðìèé  
5íåè 5HVý(5-ê*(<-ýìíêý9ýõìíýNýRKPô íëëðêäíçðìçê  
5íåç 5HVý(5-ê*(<-ýìíëý9ýõìýNýRKPô íëëðêäíçðìèé  
5íåæ 5HVý(5-ê*(<-ýìíêý9ýõìíýNýRKPô íëëðêäíçðìçê  
5íäé 5HVý(5-ê*(<-ýìèëý9ýõìïèýNýRKPô íëëðêäíçðìèè  
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5íäå 5HVý(5-ê*(<-ýéæêý9ýõéæýNýRKPô íëëðêäíçðìæì  
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5ìíç 5HVý(5-ê*(<-ýëæéý9ýõëæíýNýRKPô íëëðêäíçðìæä  
5ìíæ 5HVý(5-ê*(<-ýìíìý9ýõìííýýRKPô íëëðêäíçðìéê  
5ìíå 5HVý(5-ê*(<-ýìëêý9ýõìëýNýRKPô íëëðêäíçðìçé  
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5ìëå 5HVý(5-ê*(<-ýìííý9ýõìíýýRKPô íëëðêäíçðìêå  
5ìëä 5HVý(5-ê*(<-ýìííý9ýõìíýýRKPô íëëðêäíçðìêå  
5ìêí 5HVý(5-ê*(<-ýìèéý9ýõìèíýNýRKPô íëëðêäíçðêäë  
5ìêì 5HVý(5-ê*(<-ýëëìý9ýõëëíýýRKPô íëëðêäíçðëåå  
5ìêë 5HVý(5-ê*(<-ýìåéý9ýõìåíýNýRKPô íëëðêäíçðìææ  
5ìêê 5HVý(5-ê*(<-ýìííý9ýõìíýýRKPô íëëðêäíçðìêå  
5ìêé 5HVý(5-ê*(<-ýéæëý9ýõéïæýNýRKPô íëëðêäíçðìçí  
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5ìéê 5HVý(5-ê*(<-ýìíëý9ýõìýNýRKPô íëëðêäíçðìèé  
5ìéé 5HVý(5-ê*(<-ýëëêý9ýõëëýNýRKPô íëëðêäíçðìçæ  
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5ììè 5HVý(5-ê*(<-ýçåëý9ýõçïåýNýRKPô íëëðêäíçðìçë  
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5ìçí 5HVý(5-ê*(<-ýéæêý9ýõéæýNýRKPô íëëðêäíçðìæì  
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5ìëì 5HVý(5-ê*(<-ýéæíý9ýõéæýýRKPô íëëðêäíçðìéì  
November 1998  
Part No. 001-7600-001  
7-16  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PARTS LIST  
7640 (UHF) Main Unit  
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5ìæí 5HVý(5-ê*(<-ýçåëý9ýõçïåýNýRKPô íëëðêäíçðìçë  
5ìæë 5HVý(5-ê*(<-ýìíêý9ýõìíýNýRKPô íëëðêäíçðìçê  
5ìæê 5HVý(5-ê*(<-ýìíêý9ýõìíýNýRKPô íëëðêäíçðìçê  
5ìæé 5HVý(5-ê*(<-ýéæìý9ýõéæíýýRKPô íëëðêäíçðìèí  
5ìæè 5HVý(5-ê*(<-ýìíêý9ýõìíýNýRKPô íëëðêäíçðìçê  
5ìæç 5HVý(5-ê*(<-ýìíèý9ýõìý0ýRKPô íëëðêäíçðìåé  
5ìææ 5HVý(5-ê*(<-ýçåêý9ýõçåýNýRKPô íëëðêäíçðìæê  
5ìæå 5HVý(5-ê*(<-ýìíéý9ýõìííýNýRKPô íëëðêäíçðìæè  
5ìæä 5HVý(5-ê*(<-ýìíëý9ýõìýNýRKPô íëëðêäíçðìèé  
5ìåí 5HVý(5-ê*(<-ýìíêý9ýõìíýNýRKPô íëëðêäíçðìçê  
5ìåì 5HVý(5-ê*(<-ýìíëý9ýõìýNýRKPô íëëðêäíçðìèé  
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5ëëë 5HVý(5-ê*(<-ýìíëý9ýõìýNýRKPô íëëðêäíçðìèé  
5ëëê 5HVý(5-ê*(<-ýìíëý9ýõìýNýRKPô íëëðêäíçðìèé  
5ëëé 5HVý(5-ê*(<-ýìíëý9ýõìýNýRKPô íëëðêäíçðìèé  
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5ëéæ 5HVý(5-ê*(<-ýìíëý9ýõìýNýRKPô íëëðêäíçðìèé  
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5ëçæ 5HVý(5-ê*(<-ýëæéý9ýõëæíýNýRKPô íëëðêäíçðìæä  
5ëçå 5HVý(5-ê*(<-ýìíêý9ýõìíýNýRKPô íëëðêäíçðìçê  
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5ëæí 5HVý(5-ê*(<-ýìíèý9ýõìý0ýRKPô íëëðêäíçðìåé  
November 1998  
7-17  
Part No. 001-7600-001  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PARTS LIST  
7640 (UHF) Main Unit  
Front Unit (All Models)  
5HIý1Rï  
'HVFULSWLRQ  
3DUWý1Rï  
5HIý1Rï  
'HVFULSWLRQ  
3DUWý1Rï  
5ëæì 5HVý(5-ê*(<-ýìíêý9ýõìíýNýRKPô íëëðêäíçðìçê  
5ëæë 5HVý(5-ê*(<-ýìíëý9ýõìýNýRKPô íëëðêäíçðìèé  
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7DQWDOXPý(&67ì(<éæé5  
November 1998  
Part No. 001-7600-001  
7-18  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PARTS LIST  
Front Unit (All Models)  
5HIý1Rï  
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3DUWý1Rï  
5HIý1Rï  
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November 1998  
7-19  
Part No. 001-7600-001  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PARTS LIST  
Front Unit (All Models)  
Chassis Parts  
5HIý1Rï  
'HVFULSWLRQ  
3DUWý1Rï  
5HIý1Rï  
'HVFULSWLRQ  
3DUWý1Rï  
5éì  
5éë  
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5éè  
5éç  
5éæ  
5éå  
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5èí  
5èì  
5èë  
5èê  
5èé  
5èè  
5èç  
5èæ  
5èå  
5èä  
5çí  
5HVý(5-ê*(<-ýëæéý9ýõëæíýNýRKPô íëëðêäíçðìæä  
5HVý(5-ê*(<-ýêêéý9ýõêêíýNýRKPô íëëðêäíçðìåí  
5HVý(5-ê*(<-ýìëêý9ýõìëýNýRKPô íëëðêäíçðìçé  
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03ì  
03ë  
03ê  
03é  
03è  
03ç  
03æ  
03å  
03ä  
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ëíèèý)URQWýSDQHO  
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ëíèèý&RYHU  
5HVý(5-ê*(<-ýìíìý9ýõìííýýRKPô íëëðêäíçðìéê  
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5HVý(5-ê*(<-ýìíëý9ýõìýNýRKPô íëëðêäíçðìèé  
5HVý(5-ê*(<-ýìíëý9ýõìýNýRKPô íëëðêäíçðìèé  
5HVý(5-ê*(<-ýìíëý9ýõìýNýRKPô íëëðêäíçðìèé  
5HVý(5-ê*(<-ýìíëý9ýõìýNýRKPô íëëðêäíçðìèé  
5HVý(5-ê*(<-ýìíéý9ýõìííýNýRKPô íëëðêäíçðìæè  
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5HVý(5-ê*(<-ýéæêý9ýõéæýNýRKPô íëëðêäíçðìæì  
5HVý(5-ê*(<-ýìíëý9ýõìýNýRKPô íëëðêäíçðìèé  
ëíèèý0ð3ODWH  
5XEEHUýVKHHWýõ$.ôðì  
3+ý%7ý0êý;ýåý1,ð=8  
ëíèèý6SHDNHUýSODWH  
ëíèèý6SHDNHUýQHWðì  
03ìì ììëçý75ð$ýFOLS  
03ìë 6SRQJHýõ)/ô  
03ìê 5XEEHUýVKHHWýõ$0ô  
63ì  
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:6ì  
7ULPPHUý59ðìèíý  
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'HVFULSWLRQ  
3DUWý1Rï  
5çì  
5çë  
5çê  
5çé  
5çè  
5çç  
5çæ  
5çå  
5çä  
5æí  
5HVý(5-ê*(<-ýìíéý9ýõìííýNýRKPô íëëðêäíçðìæè  
5HVý(5-ê*(<-ýìíëý9ýõìýNýRKPô íëëðêäíçðìèé  
5HVý(5-ê*(<-ýìíëý9ýõìýNýRKPô íëëðêäíçðìèé  
5HVý(5-ê*(<-ýìíëý9ýõìýNýRKPô íëëðêäíçðìèé  
5HVý(5-ê*(<-ýìíéý9ýõìííýNýRKPô íëëðêäíçðìæè  
5HVý(5-ê*(<-ýìíéý9ýõìííýNýRKPô íëëðêäíçðìæè  
5HVý(5-ê*(<-ýìíéý9ýõìííýNýRKPô íëëðêäíçðìæè  
5HVý(5-ê*(<-ýéæêý9ýõéæýNýRKPô íëëðêäíçðìæì  
5HVý(5-ê*(<-ýìíéý9ýõìííýNýRKPô íëëðêäíçðìæè  
5HVý(5-ê*(<-ýéæêý9ýõéæýNýRKPô íëëðêäíçðìæì  
æçéíýõ8+)ôý&+$66,6ý3$576  
 
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ëíèèý&KDVVLV  
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03ì  
03ë  
03ê  
03é  
03æ  
03å  
03ä  
íëëðêäíçðæèì  
íëëðêäíçðæèæ  
íëëðêäíçðæèè  
íëëðêäíçðæèç  
íëëðêäíçðæçí  
íëëðêäíçðæçì  
íëëðêäíçðæçë  
íëëðêäíçðæèë  
íëëðêäíçðæèé  
íëëðêäíçðæçê  
íëëðêäíçðæçé  
ëíèèý&RYHU  
ëíèèý)URQWýSDQHO  
ëíèèý)URQWýNH\ýõ$ô  
3+ý%7ý0êý;ýåý1,ð=8  
ëíèèý6SHDNHUýSODWH  
ëíèèý6SHDNHUýQHWðì  
 
 
 
-XPSHUý0&5ìí(=+-ý-3:ýõíííô íëëðêäíçðæåæ  
03ìì ììëçý75ð$ýFOLS  
-XPSHUý(5-ê*(ý-3:ý9  
&DEOHý23&ðæéì  
íëëðêäíçðìåè  
íëëðêäíçðæåå  
03ìë 5XEEHUýVKHHWýõ$0ô  
63ì  
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&U\VWDOý&5ðèäíýõçïåíìèý0+]ô  
íëëðêäíçðæåä  
November 1998  
Part No. 001-7600-001  
7-20  
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MP7 (C)  
J1 (C)  
MP1 (C)  
MAIN UNIT (Bottom side)  
MP5 (C)  
MP6 (C)  
MP3 (M)  
MP7 (C)  
J5 (M)  
W3 (F)  
MP7 (C)  
J1 (F)  
W7 (M)  
MP7 (C)  
MP12 (M)  
FRONT UNIT  
MP1 (F)  
EP2 (F)  
MP4 (M)  
MP11 (C)  
MP6 (C)  
MP1 (M)  
MP9 (C)  
DS1 (F)  
MP2 (F)  
MP5 (M)  
SP1 (C)  
WS1 (C)  
MP2 (M)  
MP3 (C)  
MP2 (C)  
MP7 (C)  
MP8 (C)  
MP13 (C)  
MP4 (C)  
MP7 (C)  
MP7 (C)  
VHF (7610) EXPLODED VIEW  
November 1998  
7-21  
Part No. 001-7600-001  
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UHF (7640) EXPLODED VIEW  
November 1998  
7-22  
Part No. 001-7600-001  
FOLDOUT (VHF Exploded View)  
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SECTION 8 - SCHEMATIC DIAGRAMS AND COMPONENT LAYOUTS  
COMMON LINE  
LINE  
RX LINE  
TX LINE  
DATA BUS LINE  
5V  
MAIN UNIT  
5V  
RIPPLE  
FIL  
5V  
Q10  
1
5V  
VCC  
FWD  
5V  
T1  
T5  
T5  
T5  
x1 or x2  
2
3
4
5
6
7
8
T2  
PWR  
AMP  
REF  
OSC  
PLL  
IC  
LOOP  
FIL  
TX/RX  
SW  
DRIVE  
AMP  
VCO  
BUFF  
Q6  
BUFF  
BUFF  
Q3  
BUFF  
Q2  
LPF  
L5  
ANT  
SW  
T3  
NWC  
LPF  
Q4  
Q1  
IC1  
Q7.Q8  
D7.D8  
L14  
T4  
C60.C61  
IC2  
D5.D6  
D3.D4  
D13.D14  
L17.L18  
A/D  
L1.L2.L3  
REV  
REF  
REF BAL  
SCK  
SO  
PLST  
UNLK  
AF  
DTCS  
5V  
DISC  
x3  
VCC  
BAL  
R5  
BUFF  
BPF  
APC  
CTRL  
RF  
DET  
2nd Lo  
IC5  
Q5  
L23.L24  
FM DET  
BPF  
L26.L27  
1St LO  
L22  
D1.D2  
5V  
IC6C  
Q17.18  
IC3  
T4  
L19.D16  
R5  
L21  
D18.D19  
R5  
R5  
NOIS  
SD  
L20.D17  
D20.D21  
RF  
AMP  
IF  
AMP  
XTAL  
BPF  
BPF  
T4  
BPF  
BPF  
T2  
BPF  
ATT  
CERAMIC  
BPF  
FI3.FI4  
or FI5  
Q13  
Q14  
Q12  
Q35  
RF ATT  
FI1 or FI2  
T3  
T1  
NWC  
J4  
SP  
MOD  
IC4d  
AFO  
5V  
5V  
5V  
5V  
J5  
HV  
5V  
T5  
5V  
IC4a  
AF  
AMP  
LIMIT  
AMP  
EX.SP  
AMP  
HPF  
BUFF  
IC7c  
LPF  
BUFF  
IC4c  
IC7a  
AF OUT  
IC6d  
IC10  
E
X
T
O
N
E
T
D
T
C
S
DET  
IC7b  
IC6b  
O
N
E
IC8  
AMUT  
AMUT  
AFHPF  
NWC  
T5C  
5V  
J5  
5V  
HV  
AFON  
FAN  
TMUT  
HORNO  
AFATT  
AFHPF  
NWC  
MIC  
AMP  
IC7d  
MICOUT  
IC4b  
MMUT  
MICIN  
EXP  
SO  
SCK  
EXST  
EXEN  
CPU5  
CPU5  
IC11  
MMUT  
FRONT UNIT  
M
M
R
M
MMUT  
RMUT  
SHIFT  
CTRL  
CTRL  
RESET  
IC2.Q1  
EEPROM  
IC3  
CPU5  
X1  
D25  
D5,C17  
IC1  
RMUT  
CTRL  
DS1  
+5  
REG  
CPU5  
5V  
VCC  
W7  
GND  
IC9  
D26  
J2  
T5  
SW  
+5  
REG  
T5  
OPV1  
15  
14  
13  
12  
11  
10  
9
16  
17  
18  
19  
20  
21  
SCK  
SI  
LCD  
OPV2  
OPV3  
Q28  
T5C  
Q29.Q30  
PWON  
SO  
COM1-COM3  
SEG1-SEG32  
OPT3  
OPINT  
OPCS  
REM  
OPT2  
OPT1  
OPV3  
OPV2  
OPV1  
OPINT  
OPCS  
BUSY  
SI  
R5  
SW  
OPT3  
OPT2  
OPT1  
R5  
HV  
8V  
EXTONE  
IN  
J2  
X
8V  
40  
38  
36  
34  
32  
30  
39 5V  
22  
23  
24  
25  
26  
AFOUT  
DET  
Q27  
R5C  
CPU5V  
GND  
37 AFO  
35 SI  
SIGOUT  
MOWN  
BUSY  
8
5V  
7
RXMUT  
BEEPOUT  
AFONOP  
MICMUTE  
HV  
NC  
NC  
OPINT  
OPCS  
BUSY  
33 OPT3  
31 OPT2  
29 OPT1  
27 OPV3  
25 OPV2  
23 OPV1  
21 PTT  
6
5
BACK  
LIGHT  
DIM  
CTRL  
8V  
REG  
HV  
SW  
DIM  
X
MICIN  
4
27  
28  
29  
30  
Q26  
BEEPOUT 28  
MICOUT  
3
DS2-DS11  
Q3.D6  
SO  
Q36  
CPU  
PTTOUT  
PTTIN  
TONE  
BEEP  
DTCSIN  
RFATT  
NOIS  
UNLK  
EXEN  
EXST  
DAST  
PLST  
VIN  
26  
24  
22  
20  
18  
16  
14  
12  
10  
8
2
5V  
SCK  
PWON  
1
GND  
PLST  
DAST  
EXST  
EXEN  
PWON  
RFATT  
NOIS  
UNLK  
PTTIN  
EXPTT  
DIMIN  
SO  
AF CH U/D.Etc  
KEY X8  
19 PTTIN  
17 DET  
OPT  
KR0-KR3  
KS0.KS1  
15 PWON  
13 EXPTT  
11 DIMIN  
J3  
HV  
SW2-SW9  
HV  
DIMIN  
9
7
5
3
1
SO  
DIM  
DIM  
SW  
J1  
SCK  
SO  
HORN  
POSW  
6
Q32  
8V  
1
3
2
5V  
HORNO  
TEMP  
MIC  
4
LVIN  
GND  
AFO  
DET  
IN  
HORN  
SW  
POSW  
CPU5V  
GND  
4
AFO  
2
S1  
5
6
SI  
AFO  
DET  
IN  
Q33  
LVIN  
OPINT  
OPCS  
BUSY  
7
8
OPT3  
OPT2  
OPT1  
OPV3  
OPV2  
OPV1  
PTT  
to MAIN  
TEMP  
VIN  
9
10  
12  
14  
16  
18  
20  
22  
24  
26  
28  
30  
32  
34  
36  
38  
40  
11  
5V  
SIG  
SW  
BEEPOUT 13  
PTT  
TONE  
BEEP  
DTCS  
RFATT  
NOIS  
UNLK  
EXEN  
EXST  
DAST  
PLST  
VIN  
15  
17  
19  
21  
23  
25  
27  
29  
31  
33  
35  
37  
39  
Q34  
EXPTT  
J1  
LPF  
Q5  
DET  
8V  
PTTIN  
DET  
5V  
CLONE  
AFO  
CLONE  
I/F  
PWON  
EXPTT  
DIMIN  
SO  
PTT  
D/A  
DTCSIN  
TONE  
Q6  
R33.R34.R35  
MIC  
Q4  
MIC  
5V  
SCK  
5V  
HANGER  
SD  
AMP  
TEMP  
MIC  
LVIN  
GND  
Q7  
R60  
BEEP  
MUTE  
BEEPOUT  
BEEP  
to FRONT  
Q10  
November 1998  
Part No. 001-7600-001  
VHF (7610) BLOCK DIAGRAM  
8-1  
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VHF (7610) Transistor Basing Diagrams  
VHF (7610) Diode Basing Diagrams  
November 1998  
8-2  
Part No. 001-7600-001  
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November 1998  
8-3  
VHF (7610) MAIN BOARD BOTTOM VIEW  
Part No. 001-7600-001  
FOLDOUT  
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November 1998  
8-4  
VHF (7610) MAIN BOARD TOP VIEW  
Part No. 001-7600-001  
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T5  
R5  
5V  
T5  
R242  
470  
VHF MAIN UNIT  
LVIN  
CP1  
Q10  
2SC4081  
Q38  
2SD1664  
R232  
470k  
R54  
47k  
C82  
33p  
Q11  
2SK880  
R7  
33  
R6  
22  
L4  
LW-25  
15.3MHz  
REF  
BAL  
X1  
CR-575  
10nH(LMR,H-band only)  
47nH(Others)  
R233 C85  
R51  
100  
R9  
56  
R46  
10k  
1k  
2.2  
18p(LMR,L-band)  
8p(PMR,L-band)  
12p(H-band)  
1k(PMR)  
100(LMR,H-band)  
330(LMR,L-band)  
IC2 µPD3140GS  
R44 10  
1
2
3
4
5
6
7
8
9
20  
19  
18  
17  
16  
15  
14  
13  
12  
11  
IC1  
VCC1  
IN1  
GND1  
IN2  
C52  
2p  
SC-1364(PMR,L-band)  
SC-1365(PMR,H-band)  
M68702L(LMR,L-band)  
L14  
R42  
560  
L15  
2.7µH  
GND  
1
GND  
4
MC152-E558CN  
-100024  
10p(L-band)  
9p(H-band)  
PLST  
SCK  
SO  
FWD  
REV  
C33  
15p(PMR)  
18p(LMR,L-band)  
8p(LMR,H-band)  
ENB  
CLK  
DATA  
T1  
VCC2  
XB  
D3  
MI407  
C15  
0.001  
L2  
LA243  
L1  
LA253  
M68702H(LMR,H-band)  
ANT  
Q7  
2SC4226  
W1  
C36  
47p  
2
3
XI  
R37  
1k  
UNLK  
Q3  
2SC4215  
L7  
L6  
XO  
R12  
560  
C29  
L5  
LA253  
L3  
LA253  
C41  
18p  
D5  
MA77  
R24  
100  
C39  
10p  
C4  
470P  
L16  
32nH  
R49  
LOK  
CP1  
FI1  
GND2  
CP2  
FI2  
C9  
Q9  
DTC114EU  
EXB-V8V  
(1kx4)  
Q1  
2SC4703  
D10  
MA77  
MOD  
IN  
R59  
22k  
18k  
Q8  
2SC4226  
Q6  
2SC4215  
Q5  
2SC4215  
Q4  
2SC4215  
Q2  
2SC4215  
10  
R238  
FO1  
FO2  
R5  
1.5k(PMR)  
470p 1.8k(LMR)  
D6  
MA77  
C7  
F
C53  
1.5p  
C48  
0.5p  
R4  
D29  
DA221  
C46  
22p  
D1  
1SS375  
D2  
1SS375  
36p(PMR,L-band only)  
27p(H-band)  
18p(LMR,H-band only)  
22p(Others)  
R112  
100  
R111  
100  
R5  
18p(PMR,L-band only)  
12p(H-band)  
5V  
Q35  
DTA144EU  
Q17  
2SB1143  
R78  
4.7k  
RX:4.7V  
FI2  
SFPC450G  
R113  
3.9k  
RX:0V  
C144  
15p  
C142  
4p  
C140  
10p  
X3  
R167  
4.7k  
Q16  
DTA144EU  
IC3  
TA31136FN  
CDBCA450CX24  
2.2V  
R102  
1.5k  
C156  
2.2  
NWC  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
OSCIN  
OSCOUT  
MIXOUT  
VCC  
MIXIN  
GND  
C107  
1p  
C99  
1.5p  
C90  
4p  
L18  
656LZ-09K  
L17  
656LZ-09K  
C93  
1P  
C148  
0.1  
N-REC  
N-DET  
RSSI  
15k(LMR,L-band only)  
4.7k(Others)  
R95  
1.5k  
C130  
0.01  
C124  
0.001  
R87  
820  
RX:0V  
Q12  
3SK239  
FI1b  
FI1a  
C104  
0.001  
C113  
5p  
IC6c  
NJM2902V  
D22  
DAN202U  
IFIN  
R118  
15k  
Q18  
2SC4081  
R116  
4.7k  
DEC  
IFOUT  
QUAD  
AFOUT  
C128  
0.01  
R89  
560  
Q13  
3SK166  
C138  
220p  
R119  
100k  
Q19  
DTC144EU  
9
-
R120  
Q15  
2SC4081  
FI3  
SFPC450G  
FI4  
SFPC450E  
RX:0.63V  
FILOUT  
FILIN  
8
C149 R104  
0.1 10  
RX:1.2V  
C118  
15p  
L23  
47nH  
R74  
100k  
R62  
100k  
R97  
470  
10  
+
FI1  
FL-285  
D23  
DAN202U  
I
O
I
O
Q14  
R73  
100k  
R61  
100k  
3.6V  
2SC2714  
Q23  
DTC144EU  
22(LMR,L-band only)  
10(Others)  
T5  
5V  
5V  
5V  
IC5  
C287  
100p  
R229  
47k  
C196  
0.1  
R227  
680k  
R157  
12k  
R156  
680k  
C213  
0.001  
R150  
210k  
R146  
68k  
B
M62363FP-650C  
C198 15p  
R141  
100k  
C171  
0.001  
1
2
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
IC4  
VIN1  
VIN8  
C164 0.022  
R128 100k  
BU4066BCFV  
R174 680k  
VOUT1  
VOUT2  
VIN2  
VDD  
VOUT8  
VOUT7  
VIN7  
R236  
100k  
3
R175  
10k  
IC6b  
NJM2902V  
C295  
0.001  
C192  
0.01  
C190  
0.01  
C189  
0.01  
C284  
390p  
R136  
68k  
R135  
27k  
A
4
R134  
4.7k  
13  
-
8
1
R142  
100k  
4
14  
3
5
+
6
-
6
5
5
5
6
2
3
12  
+
+
-
7
-
+
7
GND  
+
-
7
R131  
68k  
D31  
DA204U  
R125  
10  
C293  
0.1  
-
+
1
2
6
C197  
0.1  
LD  
RESET  
VDAREF  
DO  
13  
12  
R223  
33k  
C172  
200p  
4
7
-
+
14  
Q22  
DTC144EU  
11  
IC8b  
NJM2904V  
IC7b  
NJM2902V  
CLK  
9
-
8
IC6a  
IC8a  
NJM2904V  
8
DI  
R143  
100k  
NJM2902V  
Q21  
10  
9
IC6d  
NJM2902V  
IC7a  
NJM2902V  
Q20  
+
VIN3  
VOUT3  
VOUT4  
VIN4  
VIN6  
R169  
2.2k  
R165  
47k  
R123  
6.8k  
DTC144EU  
DTC363EK  
10  
11  
12  
Q39  
DTC144EU  
R162  
68k  
C194  
2.2  
VOUT6  
VOUT5  
VIN5  
IC7c  
NJM2902V  
R177  
47k  
AFREF  
2
-
+
4
1
3
R178  
33k  
11  
R168  
1M  
D33  
DAN202U  
AFREF  
8V  
T5  
R5  
5V  
G
R129 560  
AFO  
VCC  
7.7V  
TX:0V  
RX:5.0V  
TX:5.0V  
RX:0V  
H
CPU5  
T5  
13.2V  
Q29  
2SB1201  
R5  
5V  
IC11  
BU4094BCFV  
CPU5  
5.0V  
(PMR)  
1
2
3
4
5
6
7
8
16  
R251  
PTH9C32  
STRB  
DATA  
CLK  
Q1  
VDD  
OENA  
Q5  
Q26  
2SB1124  
Q27  
2SA1588  
Q28  
2SA1588  
15  
14  
13  
12  
11  
10  
9
6
1
5
4
3
D25  
MA111  
Q36  
2SD1664  
R221  
22  
LMR  
(only)  
5.0V  
J1  
1
AFO  
SI  
Q30  
XP6501  
Q40  
2SC4081  
Q6  
2
8V  
5V  
Q2  
Q7  
R212  
EXB-V8V  
(1kX4)  
CPU5V  
GND  
AFO  
13.2V  
W7  
Q3  
Q8  
IC10  
LA4425A  
R216  
EXB-V8V(1kx4)  
D26  
DAN202U  
SI  
R237  
1k  
2
VCC  
GND  
Q4  
Q'S  
QS  
R196  
47k  
C206  
470  
OPINT  
OPCS  
OPINT  
OPCS  
BUSY  
BEEPOUT  
TONE  
BEEP  
DTCS  
RFATT  
NOIS  
OPT3  
OPT2  
OPT1  
OPV3  
OPV2  
OPV1  
PTT  
OPT3  
OPT2  
OPT1  
OPV3  
5
3
IC9  
VSS  
1
2
R203  
4.7k  
R204  
1k  
4
S-81250PG-PD  
BUSY  
Q25  
DTC114EU  
O
I
BEEPOUT  
G
D24  
MA111  
Q37  
DTC144WU  
Q31  
DTC144EU  
Q24  
DTC144EU  
R213  
EXB-V8V(1kX4)  
R217  
EXB-V8V(1kx4)  
TONE  
BEEP  
DTCS  
RFATT  
OPV2  
OPV1  
J4  
P1  
PTTIN  
DET  
5V  
5V  
SP  
PTTOUT  
PTTIN  
SP GND  
SP1  
UNLK  
EXEN  
EXST  
DAST  
PLST  
PWON  
EXPTT  
DIMIN  
SO  
I
AF OUT  
TO SP  
J5  
J6  
J2  
1
R214  
EXB-V8V(1kX4)  
R218  
EXB-V8V(1kx4)  
to  
30  
EXTERNAL  
SPEAKER  
NOIS  
UNLK  
EXEN  
EXST  
DET  
PWON  
EXPTT  
DIMIN  
C
PTTIN  
SP GND  
SCK  
PTTOUT  
MICOUT  
MICIN  
NC  
5V  
Q32  
DTC114EU  
Q33  
DTC114EU  
VIN  
SD  
HV  
HV  
GND  
TEMP  
MIC  
LVIN  
GND  
MICMUTE  
AFONOP  
BEEPOUT  
RXMUTE  
DET  
DIMIN  
to FAN  
R215  
EXB-V8V(1kX4)  
R219  
EXB-V8V(1kx4)  
BUSY  
NC  
HORNO  
AFO  
J3  
39 40  
NOTE: All 7610 Models are LMR (U.S.A.), H-Band (146-174 MHz).  
DAST  
PLST  
VIN  
SO  
SCK  
SD  
HV  
DIM  
to  
SIGOUT  
OPT1  
OPT2  
OPT3  
DET  
FRONT UNIT  
J2  
AFOUT  
REM  
EXPTT  
HORN  
GND  
AFO  
GND  
DET  
GND  
IN  
TEMP  
MIC  
LVIN  
OPCS  
OPINT  
SO  
for  
C200  
0.22  
OPTIONAL  
CABLE  
C229  
1
Q34  
2SJ144  
OPV3  
OPV2  
OPV1  
SI  
IN  
SCK  
C230  
0.22  
GND  
PTT  
15 16  
IN  
EXTONE  
for  
OPTIONAL  
UNIT  
D28  
MA111  
R220  
100  
D
E
November 1998  
Part No. 001-7600-001  
VHF (7610) MAIN BOARD SCHEMATIC  
8-5  
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DET  
AFOUT  
NWC  
N/W  
SW  
N/W  
SW  
R8V  
R8V  
HV  
8V  
FI3  
FI2  
D3,D4,D5  
D10  
BPF  
D9  
D8  
D7  
D12  
D13  
FI1  
FOR  
REV  
Q3  
IC11  
IC11  
AF  
IC6C,D  
HPF  
J1  
RF  
AMP  
TX/RX  
SW  
MCF  
LPF  
BPF  
BPF  
BPF  
LPF  
LPF  
AF  
AMP  
AF  
SW  
D/A  
AMP  
SW  
Q2  
IC9  
IC4A  
Q5  
5V  
46.35MHz  
IC12  
B
5V  
R8V  
T4  
T3  
T2  
T1  
T8V  
N/W  
SW  
5V  
RMUT  
TXC  
Q22  
D1  
J2  
X1  
RFATT  
APC  
DET  
H
G
RF  
ATT  
LPT  
IF  
AMP  
SHIFT  
SW  
AFHPF  
1
2
AF  
MUTE  
FM IC  
IC1  
BEEP  
Q33  
Q1  
Q4  
AFO  
Q32  
LVIN  
AMP  
IC7B  
2nd  
Lo  
T8V  
T8V  
T8V  
VCC  
HV  
AFATT  
AFON  
APC  
CTRL  
IC4B  
Q17  
Q18  
D18,D19  
Q23,D20,D34  
NOIS  
SD  
YGR  
AMP  
PWR  
AMP  
TX/RX  
SW  
DRIVE  
AMP  
BUFF  
Q20  
IC5  
MICOUT  
MICIN  
T4  
RX  
VCO  
Q21  
Q19  
N
O
I
N
O
I
5V  
8V  
8V  
APCV  
Q24  
Q26  
Q27  
S
I
S
O
U
T
IC7A  
IC11  
IC11  
TXC  
VCO  
SW  
5V  
N
MIC  
MOD  
AF  
SW  
AF  
SW  
LIMIT  
AMP  
SUPRA-  
TTER  
AMP  
IC8B  
LPF  
BUFF  
Q28  
BUFF  
Q30  
24  
VCC  
A
IC8A  
2
3
23  
21  
22  
14  
T1  
T2  
T3  
T4  
MMUT  
SIGOUT  
TONE  
TXC  
TXC  
TX  
VCO  
DTCS  
D/A  
IC12  
BUFF  
IC6B  
Q25,D22,D33  
10  
11  
N/W  
SW  
DTCSOUT  
REF  
NWC  
CPU5V  
+5  
REG  
D21  
W6  
Q35  
DTCS  
IC3  
MOD  
8V  
5V  
8V  
IC10  
5V  
TXC  
SO  
SCK  
DAST  
LOOP  
FIL  
PLL  
IC  
TMUT  
BUFF  
Q29  
HV  
POWER  
SW  
L32,L33  
BPF  
PWON  
HORNO  
AFATT  
AFHPF  
NWC  
Q34  
2nd  
Lo  
Q14  
Q15  
SO  
SCK  
EXST  
EXEN  
+5V  
EXP  
IC13  
45.9MHz  
MAIN UNIT  
+8  
REF  
8V  
15.3MHz  
REG  
TCXO  
X2  
SO  
DTCSOUT  
IC2  
SCK  
PLST  
UNLK  
MM  
RM  
R8V  
R8V  
TXC  
Q10  
Q11  
D15  
VOLT  
DET  
VCC  
COMMON LINE  
LINE  
FRONT UNIT  
DIMIN  
EXPTT  
PWON  
RFATT  
DS2-DS11  
Q3  
T8V  
T8V  
8V  
R8V  
RX LINE  
TX LINE  
BACK  
LIGHT  
LED  
CTRL  
TEMP  
DET  
CPU5  
Q8  
Q9  
TMUT  
D14  
DS1  
D
I
M
N
O
I
S
D
L
V
I
V
I
N
T
E
M
P
DTCSIN  
CONV  
Q6  
+5V  
CTRL  
5V  
DATA BUS LINE  
LCD  
S
N
CPU5V  
RMUT  
MMUT  
CTDA0  
CTDA2  
CPU5V  
Q12  
Q13  
RMUT  
CTRL  
AF,CH U/D,Etc  
SWITCH x8  
MMUT  
CTRL  
MM  
RM  
RXMUT  
MIMUT  
O
P
T
I
SCK  
SI  
SO  
D24,Q37  
D25,Q46  
J4  
OPINT  
OPCS  
BUSY  
OPT1  
OPT2  
OPT3  
OPV1  
OPV2  
OPV3  
O
N
15  
14  
13  
12  
11  
10  
9
8
7
6
5
16  
OPV1  
OPV2  
OPV3  
GND  
OPT3  
OPT2  
OPT1  
SCK  
SI  
SO  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
POSW  
POSW  
HANG  
OPINT  
OPCS  
REM  
AFOUT  
DET  
RXMUT  
BEEPO  
AFON  
MIMUT  
HV  
CPU  
HV  
B
U
S
Q38  
J5  
HV  
DIM  
HORN  
SIGOUT  
1
2
3
DIM  
SW  
CPU5V  
RES  
MDWN  
BUSY  
AUX  
DIMIN  
RESET  
IC1  
4
5
6
7
8
9
Microphone  
HANG  
IC2,Q1,D1  
4
3
2
1
MICIN  
AFO  
DISC  
IN  
MICOUT  
PTTOUT  
PTTIN  
Q39  
HANGER  
PTTIN  
8V  
CLIN  
PTT  
5V  
GND  
CLONE  
I/F  
HORN  
SW  
CLOUT  
HORNO  
C
10  
11  
PTTIN  
PTT  
Q4,D2  
5V  
SHIFT  
SW  
CLONE  
AFO  
AFO  
DET  
C
T
C
I
B
M
M
T
O
N
E
D
T
M
F
X1  
D5  
N
Q40  
MIC  
MIC  
DET  
OPTION  
LPF  
Q5  
EE  
PROM  
SIG  
SW  
SIGOUT  
EXPTT  
TONE  
BEEP  
UT-96  
CONV  
Q7  
IC3  
UT-105  
MUTE  
Q10  
BEEPO  
November 1998  
Part No. 001-7600-001  
8-6  
UHF (7640) BLOCK DIAGRAM  
Download from Www.Somanuals.com. All Manuals Search And Download.  
November 1998  
8-7  
UHF (7640) MAIN BOARD BOTTOM VIEW  
Part No. 001-7600-001  
FOLDOUT  
Download from Www.Somanuals.com. All Manuals Search And Download.  
ANTENNA JACK  
W 6  
VCC  
G ND  
EP12  
M P10  
D28  
W 2  
J6  
2 - G nd  
1 - HV  
J6  
W 6  
1
L1  
BLK  
IC5  
M P8  
D16  
W 6  
RED  
C196  
R173  
EP2  
EP2  
C195  
EP2  
C84  
+
C94  
L16  
C99  
C98  
C95  
C337  
C96  
C97  
C285  
W 8  
C81  
R69  
L2  
Q 18  
Q 17  
D3  
C101  
L17  
C92  
C286  
Q 14  
C100  
R66  
R65  
I
O
L3  
L6  
R113  
W 10  
IC3  
C79  
C93  
C13  
C91  
R8  
R112  
R9  
C304  
R70  
C80  
W 12  
L19  
C18  
C17  
CPU5  
C342  
Q 13  
DET  
D5  
L5  
D4  
L4  
C298  
Q 45  
C194  
Q 44  
W 11  
C74  
C314  
Q 12  
D6  
IC2  
R58  
C77  
C329  
C141  
T8  
L7  
J4 (To Optional Unit)  
IC9  
8V  
C315  
C309  
C199  
C330  
C76  
R8  
C198  
CP1  
M P1, 2  
C310  
C78  
30 - G ND  
29 - 5V  
28 - HV  
1 - PTTIN  
2 - PTTO UT  
3 - M ICO UT  
4 - NC  
6 - NC  
5 - BUSY  
C326  
C328  
C70  
C142  
R117  
R115  
C325  
C295  
R116  
L8  
R189  
C68  
C348  
C67  
C206  
C327  
R187  
R188  
27 - M ICM UTE  
26 - AFO NO P  
25 - BEEPO UT  
24 - RXM UTE  
23 - DET  
22 - AFO UT  
21 - NC  
20 - O PCS  
19 - O PINT  
18 - SO  
TM UT  
J2 (To Spkr)  
C71  
C75  
C167  
C238  
R17 C317  
R190  
C213  
Q 23  
C145  
L9  
L10  
C143  
C144  
7 - NC  
L23  
L26  
2 - SPG ND  
1 - SP  
R140  
C346  
R206  
8 - SIG O UT  
9 - O PT1  
10 - O PT2  
11 - O PT3  
12 - G ND  
13 - O PV3  
14 - O PV2  
15 - O PV1  
C313  
C311  
J2  
R191  
C232  
R135  
R134  
1
C281  
5V  
R204  
C209  
R125  
C161  
R139  
R138  
W 9  
Q 30  
R124  
R123  
C150  
R20  
R110  
IC13  
R205  
L30  
C162  
D25  
C165  
X2  
17 - SI  
16 - SCK  
C151  
Q 25  
R111  
C211  
D24  
R136  
C163  
C154  
L31  
L11  
Q 37  
C289  
TXC  
C152  
C164  
EXTM  
C153  
C207  
J5 (To Opt Cable)  
11  
C212  
J3 (To Front Unit)  
R267  
R186  
C178  
C312  
1 - 8V  
2- 5V  
4 - AFO  
6 - SI  
11 - PTT  
10 - G ND  
9 - IN  
8 - G ND  
7 - DISC  
6 - G ND  
5 - AFO  
4 - G ND  
3 - HO RN  
2 - DIM  
R96  
Q 22 R95 R96  
R97  
3 - CPU5V  
C234  
C236  
5 - G ND  
C45  
L14  
C44  
8 - O PT3  
7 - O PINT  
9 - O PCS  
11 - BUSY  
13 - BEEPO UT  
15 - TO NE  
17 - BEEP  
19 - DTCS  
21 - RFATT  
23 - NO IS  
25 - UNLK  
27 - EXEN  
29 - EXST  
31 - DAST  
33 - PLST  
35 - VIN  
R208  
C235  
C335  
R109  
IC11  
FI2  
IC6  
FI3  
R94  
C331  
C134  
10 - O PT2  
12 - O PT1  
R213  
R108  
R107  
C334  
J5  
R214  
R215  
R32  
C287  
L13  
R223  
14 - O PV3  
C126  
C177  
C133  
R148  
R217  
R216  
C127  
R99  
R146  
C332  
16 - O PV2  
18 - O VP1  
20 - PTT  
22 - PTTIN  
24 - DET  
C333  
C225  
Q 39  
Q 38  
R198  
C242  
C303  
R232  
+
C129  
R100  
C128  
C176  
R44  
R45  
1 - HV  
C63  
R258  
C241  
R218  
2
1
40  
39  
R47  
Q 36  
R48  
C62  
J3  
FI1  
R101  
C282  
R155  
R36  
C58  
IC1  
1
R148  
R147  
C61  
R46  
26 - PW O N  
C288  
15  
16  
1
+
C57  
C130  
28 - EXPTT  
30 - DIM IN  
32 - SO  
J4  
C49  
C263  
C273  
FI1  
C274  
R248  
R238  
R246  
R251  
R40  
C56  
Q 40  
R153  
C272  
30  
C50  
X1  
C279  
R236  
L15  
34 - SCK  
C349  
C52  
36 - SO  
C239  
R265  
C264  
C262  
C51  
R41  
R247  
38 - LVIN  
40 - G ND  
R245  
R237  
37 - TEM P  
39 - M IC  
C271  
R239  
November 1998  
Part No. 001-7600-001  
8-8  
UHF (7640) MAIN BOARD TOP VIEW  
Download from Www.Somanuals.com. All Manuals Search And Download.  
ANTENNA  
LA382( L -H only)  
LA232(Other)  
TX:0.7V  
RX:0V  
C11 2p( L )  
1p(Other)  
L3  
C14  
5P( P )  
4P(  
LA-382( L -H only)  
LA-232(Other)  
R17 100k  
R16 47k  
R7 47  
L1  
W6  
Q14  
2SJ377  
Q8  
2SD1664  
C22  
6p( L )  
5p( ML,H )  
4p( MH )  
TX:7.9V  
RX:0V  
C23  
2p ( L )  
1.5p(ML/MH)  
R8V  
5V  
13.6V  
8V  
C20  
1.5p  
EP3  
VCC  
C13  
47p  
L5  
0V  
HV  
L
L
-L,ML)  
-MH)  
FOR  
REV  
TX:0V  
RX:7.9V  
T8V  
TX:0V  
RX:7.3V  
J1  
TX:0V  
RX:6.6V  
Y655LY-03K=P3  
L4  
L2  
LA-382  
RX:APPROX.  
+3VdBm  
C30  
0.001  
P
(
IC2 TA7808F  
FI2 CFWM450E  
W2  
EP3  
GND  
TX:8.5V  
RX:0V  
D14  
C33  
47p  
2.5µ(L)  
1.5p(ML/MH)  
0.5p(H)  
X1  
O
I
O
I
5.0V  
L7 15nH  
CDBCA450CX24  
G
C317  
47p  
7.9V  
W12  
W11  
W10  
1SS302  
C37  
1p ( L )  
1.8V  
DC  
CABLE  
IC1  
TA31136FN  
R40  
2.2k  
L11  
C38  
15nH  
1.8V  
TX:0V  
RX:7.7V  
D3  
0.3p(Other)  
CHASSIS  
FI3 CFWM450G  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
D13  
DAN202U  
Q9  
D12  
MI407 ( L )  
UM9410F( P )  
OSCIN  
OSCOUT  
MIXOUT  
VCC  
MIXIN  
GND  
Q12 2SB1132  
5.1V  
DTC114EU  
DAN202U  
0V  
Q15  
DTC114EU  
R35  
120K  
I
O
C51  
100p  
TX:0V  
RX:2.5V  
C41 1p  
C3  
0.001  
R5  
R2  
100  
1
2P( L -H only)  
8p(Other)  
R19 10  
R31  
22  
Q3  
N-REC  
N-DET  
RSSI  
Q4  
2SC4215  
C64  
0.1  
D31  
DAN202U  
0V  
RX:2.9V  
C36  
0.5p  
Q2  
2SK272  
L6  
LW-25  
IFIN  
(*)TX:3.2V  
RX:2.8V  
C29  
2SK241  
C52 100p  
TX:0V  
RX:7.9V  
DEC  
IFOUT  
QUAD  
AFOUT  
TX:0V  
RX:0.7V  
Q10 2SD1664  
D1  
MA713  
Q13  
XP6501  
TX:0V  
RX:0.7V  
Q1  
DTA144EU  
RX:2.2V  
RX:2.3V  
FILOUT  
FILIN  
C308  
R46  
100k  
TX:0V  
RX:8.5V  
1p  
R53 15k  
R58  
4.7k  
Y655LY-02M=P3  
( L -H only)  
Y655-03K  
C46  
0.001  
FI1 FL-287  
R33  
330  
3p( P -LML)  
4p( P -MH,  
6p( L -L)  
SC-1322( P -L)  
SC-1323(Other P )  
SC-1236(  
SC-1237(  
SC-1325(  
SC-1326(  
TX:0V  
RX:0.9V  
L
-ML/MH)  
D15  
1SS302  
R28  
18  
Wide:5.1V  
Narrow:0V  
5.0V  
CPU5V  
L
L
L
L
-L)  
(Other)  
R13  
220k  
5p( L -H)  
-ML)  
-MH)  
-H)  
C62  
270p  
Q5  
R14  
10k  
IC3 AN78L05M  
2.5p(H only)  
4p(Other)  
R24  
10k  
R22  
10k  
C59  
0.001  
RX:2.3V  
4.5V  
2SC4081  
7p(L/ML)  
6p( L -MH/H)  
5p( P -MH)  
W8  
Q7  
DTA144EU  
L16  
LA-242(Other)  
LA-232( P -MH, L -H)  
I
O
R44 820  
C94 6p( L -ML)  
4p( L -MH)  
3p( L, -ML)  
C66 0.01  
G
Wide:0.6V  
Narrow:0V  
P
C72 1  
WIDE:0V  
NAR:4.9V  
R112  
330k  
5p( P -MH)  
1p( L -H)  
Q11  
C60 0.01  
DTC114EU  
VIN  
TX:4.7V  
RX:0V  
5V  
TX:4.7V  
RX:0V  
8p( P -MH,other  
7p(Other P ,  
L
-H)  
)
13.6V  
R110  
NTCCF20124AH(47k)  
AFHPF  
L
HV  
T8V  
R8V  
3.4V  
Q18  
2SB1143  
6p( L  
7p( P -L,M)  
/
P -H)  
IC5  
5.0V  
R107 100  
R70 2.2  
TX:7.4V  
RX:0V  
R45  
330k  
Q44  
DTC144EU  
Q22  
2SC4081  
C87  
47p  
C131 470p  
C307 4.7  
R270 1M  
Q42  
DTC144EU  
D17  
DA221  
TX:0V  
RX:7.8V  
4
2.4V  
(*)TX:9.1V  
EP2  
2
3
-
+
1
7p(  
5p( -H)  
6p(Other  
)
RX:0V  
L17  
18nH  
P
L
R104 22k  
C130  
0.047  
C129  
0.047  
R271  
10k  
Q45  
DTA144EU  
B
TX:8.9V  
RX:0V  
L19  
15nH  
11  
R64  
150k  
R99  
2.2k  
L
)
2.4V  
2.4V  
(*)TX:11.5V  
RX:13.3V  
Q17  
(
only)  
L
2.4V  
2.4V  
R94 1.5k  
14  
2.4V  
6
W7  
R102  
1
C128  
0.047  
IC6a  
NJM2902M  
-
+
7
2.4V  
Q21  
2SC5107  
C113 7p  
10  
5
Q20  
2SC5107  
12  
R69  
150  
2.4V  
C103  
C109  
6p( L )  
7p( L )  
R63  
1M  
+
-
8
IC4b  
6
5
2SC4081  
2.4V  
+
-
-
9
7
13  
C117  
47p  
T4  
IC6c  
NJM2902M  
IC7b  
NJM2904M  
IC6d  
NJM2902M  
C127  
0.047  
C126  
0.047  
+
Q19  
2SC4703  
TX:7.6V  
RX:0V  
TX:1.7V  
RX:0V  
R65  
68k  
2.4V  
TX:Approx.  
+7dBm  
TMUT  
AFREF  
Q16  
DTC144EU  
2.1V  
(*)TX:2.1V  
RX:0V  
22( -H only)  
P
C330  
47P  
33(Other  
39( -L only)  
L
)
P
7p(  
8p( -H)  
10p(Other)  
)
P
L
39( -L only)  
P
TX:2.3V  
RX:0V  
27( -H only)  
L
(
only)  
(
L -L/ML/MH only)  
L
27(Other  
)
L
33(Other)  
VCC  
100(  
)
)
5V  
8V  
P
L
C141  
18p( L )  
15p( ML/MH )  
12p( H )  
C139  
8p( L )  
6p( ML )  
4p( MH/H )  
6.8V  
7.9V  
Q31 2SC4081  
R116 6.8k  
R117 1  
R115 6.8k  
10  
(
CPU5V  
R128  
10  
13.6V  
C335  
47p  
R142  
10k  
6.7V  
C195  
Q23  
2SC5110  
C193  
0.1  
Q46  
DTA144EU  
5
6.7V  
1
2
470  
3.3k( -ML only)  
6.8V  
P
C190  
0.1  
L22  
0.56µH  
R114  
10  
R141  
10k  
J1  
4
IC6b  
NJM2904M  
2.4V  
(*)TX:2.8V  
RX:2.7V  
L30  
27nH  
3.9k(Other  
)
P
2.4V  
R139  
18  
L31  
C162  
6p  
3.9V  
3.9V  
Q24  
DTC114EU  
2.7k( -ML only)  
L
SP JACK  
18nH  
7.8V  
L24  
1µH  
R161  
470k  
R118  
1k  
3
3.3k(Other  
)
L
C174  
0.1  
R144  
22k  
5
6
3.9V  
8
L23  
TX:2.0V  
RX:5.0V  
C158  
12p  
+
-
7
C291  
0.1  
R169  
1k  
IC8b  
NJM2904M  
MC152-E558ANA-100051=P3  
IC9  
LA4425A  
C147  
1p  
D21  
1T365  
1.1V  
3
2
2.0V  
3.4V  
R124 4.7k  
+
-
C150  
10p( L )  
8p ( ML )  
15p( MH )  
4p ( H )  
1
(*)TX:2.9V  
RX:0V  
W9  
R276  
2.0V  
R148  
100k  
2.8V  
Q29  
R145 C175  
5
TX:2.0V  
RX:3.8V  
Q30  
2SC5110  
2.4V  
6.4v  
+
-
7
SP1  
75k  
0.1  
IC4a  
NJM2904M  
R265  
10k  
C159  
2p  
8
6
P1  
J2  
C148  
5p(L,MH)  
4p(ML/H)  
3.1V  
4
A
10(  
47(  
)
)
L
P
DTCS  
0.85V  
p-p  
3
+
-
C319  
0.1(  
0.0047(  
+
-
2.5V  
1
R157 1.2M  
R125 10  
R168 100k  
C191 0.012  
)
C176  
2.2  
R269  
39k  
P
R162  
470k  
R146  
82k  
2
Q25  
2SC5110  
0.7V  
0.7V  
)
L
Q28  
2SC5107  
4
IC8a  
NJM2904M  
Q41  
2SC5107  
C184 22p  
R123 4.7k  
CTCSS  
0.7V  
DTC363EK  
2.0V  
CHASSIS  
L25  
0.18µH  
R121  
47  
p-p  
C173  
12p  
C171  
4p  
C169  
12p  
Q27  
DTC144EU  
Q26  
DTC114EU  
(LMR only)  
(PMR only)  
C322  
0.22  
C155  
0.5p  
L27  
1µH  
C186  
0.1  
R126  
560  
DTMF  
3.5V  
p-p  
W16  
W15  
W14  
W13  
D29  
DAN202U  
R151  
1p(MH only)  
3.5p(H only)  
C185  
0.1  
5 TONE  
3.2V  
p-p  
(*)TX:0V  
RX:2.9V  
G
H
L26  
180k(  
220k(  
)
)
P
L
MC152-E558ANA-100051=P3(L,ML)  
MC152-E558ANA-100050(MH, L -H )  
Q32  
DTC144EU  
( L only)  
CPU5V  
MIC  
8V  
8V  
(*)TX:3.3V  
RX:3.2V  
Q33  
2SK880  
5.1V  
R204 10k  
CP1  
R177  
MM  
D25  
MA111  
1.9V  
68k  
7.6V  
C183  
0.1  
RM  
J6  
C221  
0.0027  
HV  
IC13  
RX MUTE:  
5.1V  
Q37  
IC11  
BU4066BCF  
D24  
DAN202U DTC144EU  
to  
C232  
0.01  
BU4094BCF  
GND  
DC FAN  
5.0V  
EXST  
SO  
1
2
3
4
5
6
7
8
16  
1
2
3
4
5
6
7
14  
13  
12  
11  
10  
9
STRB  
4.9V  
VDD  
I/O  
VDD  
8
R195  
220k  
R194  
180k  
15  
14  
13  
12  
11  
10  
9
2
-
X2  
CR-601  
DATA  
CLK  
Q1  
OENA  
Q5  
O/I  
CONT A  
CONT D  
I/O  
1
2.4V  
SCK  
TXC  
TMUT  
AFO  
NWC  
3
+
IC12  
M62363FP-650C  
2.5V  
O/I  
IC7a  
NJM2904M  
R184  
2.7k  
C208  
0.0047  
0.34V  
p-p  
AFHPF  
AFATT  
4
1
2
4
3
Q38  
Q6  
VCON VCC  
GND OUT  
I/O  
C223 12p  
(*)TX:2.8V  
RX:2.7V  
DTC144EU  
1
2
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
Q2  
Q35  
2SC4081  
Q7  
VIN1  
VIN6  
CONT B  
CONT C  
VEE  
O/I  
2.2V  
J3  
15.3MHz  
HORNO  
DIMIN  
T1  
Q3  
Q8  
VOUT1 VOUT8  
VOUT2 VOUT7  
O/I  
C202  
0.022  
8V  
1
3
5
7
9
2
4
6
8
5V  
8
T2  
3
5.0V  
Q4  
0V  
Q,S  
QS  
I/O  
CPU5V  
GND  
AFO  
SI  
4
J5  
VSS  
VIN2  
VDD  
LD  
VIN7  
GND  
5
HV  
IC10  
µPD3140GS  
Q39  
C203  
0.47  
R180  
10k  
R179  
1k  
OPINT  
OPCS  
OPT3  
EXEN  
DTC144EU  
DAST  
SCK  
SO  
6
DIM  
WIDE:0V  
NAR:0.6V  
RESET  
VDAREF  
10 OPT2  
12 OPT1  
14 OPV3  
16 OPV2  
18 OPV1  
20 PTT  
HORNO  
7
HORN  
GND  
AFO  
GND  
DISC  
GND  
IN  
CLK  
DI  
L34  
18nH  
C213  
0.001  
BUSY 11  
8
D0  
R181  
1k  
BEEPOUT 13  
TONE 15  
BEEP 17  
DTCSIN 19  
RFATT 21  
NOIS 23  
UNLK 25  
EXEN 27  
EXST 29  
DAST 31  
PLST 33  
VIN 35  
9
VIN3  
VIN6  
Wide:oV  
Narrow:4.8V  
to  
R208  
10k  
T3  
T4  
10  
11  
12  
Optional  
OPC-617  
VOUT3 VOUT6  
VOUT4 VOUT5  
C236 0.1  
DET  
TO OPTION UT-96  
UT-105  
Q34  
2SK536  
PLST  
R187  
R188  
R189  
R190  
1k  
1k  
1k  
1k  
C216  
C217  
C218  
C219  
22p  
TX:0V  
RX:5.1V  
1.0V  
J4  
VIN4  
VIN5  
22 PTTIN  
24 DET  
26 PWON  
28 EXPTT  
30 DIMIN  
32 SO  
SCK  
SO  
22p  
Q36  
D
F
R207  
1k  
OPV1  
15  
16 SCK  
17 SI  
DTC144EU  
22p  
GND  
PTT  
OPV2  
OPV3  
GND  
14  
13  
12  
11  
10  
9
UNLK  
0.001  
EXPTT  
TX:4.7V  
RX:0V  
C226  
0.01  
RX MUTE:0V  
18 SO  
E
19 OPINT  
20 OPCS  
21 NC  
OPT3  
34 SCK  
36 SD  
OPT2  
OPT1  
22 AF OUT  
23 DET  
24 RXMUT  
25 BEEPO  
26 AF ON  
27 MIMUT  
28 HV  
5V  
SIGOUT  
TEMP 37  
MIC 39  
38 LVIN  
40 GND  
SIG OUT  
NC  
8
C238  
10  
Q40  
R257 C237  
47  
7
0V  
0V  
2SJ144  
1
BUSY  
6
AUX  
5
to Front unit  
J2  
MIC IN  
MIC OUT  
PTT OUT  
PTT IN  
4
R211  
100k  
3
HV  
Note  
MEASUREMENT CONDITIONS  
DIGITAL MULTIMETER  
INTERNAL RESISTANCE:50k/V  
Through  
W3 of front unit  
2
29 5V  
P
P
P
-L :PMR L-band  
-ML:PMR ML-band  
-ML:PMR MH-band  
L
L
L
L
-L :LMR L-band  
-ML:LMR ML-band  
-MH:LMR MH-band  
-H :LMR H-band  
1
30 GND  
D27  
MA111  
NOTE: All 7640 Models are the LMR (U.S.A.) type.  
IC-F420(LMR):f=460.1MHz,TX POWER=35W  
IC-F410(PMR):f=455.1MHz,TX POWER=25W  
VOLTAGES INDICATED WITH(*)MARK ARE  
CHANGED WITH THE FREGUENCY AND POWER.  
C
5.1V  
November 1998  
Part No. 001-7600-001  
UHF (7640) MAIN BOARD SCHEMATIC  
8-9  
Download from Www.Somanuals.com. All Manuals Search And Download.  
DS1  
UP  
V-UP  
1
DS8  
DN  
DS10  
V-DN  
2
2
8
J1  
1
7
J1 (To Microphone)  
P3  
R60  
P1  
P2  
P0  
DS9  
DS1  
PWR  
VHF/UHF FRONT UNIT BOARD TOP VIEW  
R51  
R52  
C3  
C10  
75  
100  
76  
C2  
W2  
R11  
R53  
1
C1  
IC2  
R1  
R26  
C36  
R57  
Q4  
R5  
D5  
C15  
R27  
C38  
R28  
R2  
IC3  
R30  
R25  
R47  
D2  
C39  
R24  
IC1  
D1  
R3  
L3  
X1  
R4  
R15  
D3  
R29  
C8  
C34  
C32  
C6  
+
C37  
D4  
C16  
R61  
+
R14  
R16  
Q3  
C47  
L1  
R58  
C7  
C12  
25  
C45  
C82  
51  
C73  
26  
50  
C11  
C77  
Q7  
R42  
R65  
R66  
R68  
W1  
R48  
R67  
R17  
C48  
C44  
C22  
R46  
R70  
+
+
C9  
C56  
R59  
39  
1
C50  
C25  
C27  
C26  
2
J2  
40  
C62  
C61  
C59  
C49  
C57  
C52  
C58  
R71  
C60  
C69  
C23  
C24  
J2 (To Main Unit)  
VHF/UHF FRONT UNIT BOARD BOTTOM VIEW  
November 1998  
Part No. 001-7600-001  
8-10  
Download from Www.Somanuals.com. All Manuals Search And Download.  
DS1  
LD-HU10140J  
1
2
3
4
5
6
7
8
SEG1  
SEG2  
SEG3  
SEG4  
SEG5  
SEG6  
SEG7  
SEG8  
SEG9  
SEG1  
SEG2  
SEG3  
SEG4  
SEG5  
SEG6  
SEG7  
SEG8  
SEG9  
FRONT UNIT  
MEASUREMENT CONDITIONS  
DIGITAL MULTIMETER:50k/VDC  
OSCILLOSCOPE  
:20MHz  
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
SEG10  
SEG11  
SEG12  
SEG13  
SEG14  
SEG15  
SEG16  
SEG17  
SEG18  
SEG19  
SEG20  
SEG21  
SEG22  
SEG23  
SEG24  
SEG25  
SEG26  
SEG27  
SEG28  
SEG29  
SEG30  
SEG31  
SEG32  
COM1  
COM2  
COM3  
SEG10  
SEG11  
SEG12  
SEG13  
SEG14  
SEG15  
SEG16  
SEG17  
SEG18  
SEG19  
SEG20  
SEG21  
SEG22  
SEG23  
SEG24  
SEG25  
SEG26  
SEG27  
SEG28  
SEG29  
SEG30  
SEG31  
SEG32  
COM0  
COM1  
COM2  
76  
77  
78  
79  
80  
81  
82  
83  
84  
85  
86  
87  
88  
89  
90  
91  
92  
93  
94  
95  
96  
97  
98  
99  
100  
50  
49  
48  
47  
46  
45  
44  
43  
42  
41  
40  
39  
38  
37  
36  
35  
34  
33  
32  
31  
30  
29  
28  
27  
26  
KR0  
KR1  
KR2  
KR3  
KS0  
KS1  
VCC  
P66/SEG15  
P65/SEG14  
P64/SEG13  
P63/SEG12  
P62/SEG11  
P61/SEG10  
P60/SEG9  
SEG21  
SEG22  
SEG23  
SEG24  
SEG25  
SEG26  
SEG27  
SEG28  
SEG29  
SEG30  
SEG31  
SEG32  
PDO/SEG41  
PD1/SEG42  
PD2/SEG43  
PD3/SEG44  
PD4/SEG45  
PD5/SEG46  
PD6/SEG47  
PD7/SEG48  
PE0/SEG49/M  
PE1/SEG50/D0  
PE2/SEG51/CL2  
PE3/SEG52/CL1  
AVCC  
TONEM  
TONED  
VTREF  
AVREF  
PB7/AN7  
PB6/AN6  
PB5/AN5  
PB4/AN4  
R46  
EXB-V8V  
(1kx4)  
EXEN  
EXST  
DAST  
PLST  
P57/WKP7/SEG8  
P56/WKP6/SEG7  
P55/WKP5/SEG6  
P54/WKP4/SEG5  
P53/WKP3/SEG4  
P52/WKP2/SEG3  
P51/WKP1/SEG2  
P50/WKP0/SEG1  
PA0/COM1  
PA1/COM2  
PA2/COM3  
PA3/COM4  
VCC  
R48  
EXB-V8V  
(1kx4)  
DIMIN  
EXPTT  
PWON  
UNLK  
COM1  
COM2  
COM3  
RFATT  
DIM  
IC1  
HD6433875A63H  
MTONE  
DTMF  
CTCSS  
DTCS  
4.0V  
2.35V  
0.7V  
OPV3  
OPV2  
OPV1  
CTCIN  
SD  
LVIN  
TEMP  
VIN  
R54 1k  
R53  
R52  
R51  
1k  
1k  
1k  
V1  
V2  
V3  
VSS  
4.9V  
3.9V  
1.7V  
4.2V  
2.3V  
0.4V  
PB3/AN3  
PB2/AN2  
PB1/AN1  
P10/TMOW  
R59  
1k  
R47  
POSW  
EXB-V8V  
(1kX4)  
S1  
R44  
EXB-V8V  
(1kx4)  
R17  
PWR  
7.6V  
J2  
EXB-V8V  
(1kx4)  
PTT  
OPT1  
OPT2  
OPT3  
8V  
CPU5V  
40  
38  
36  
34  
32  
30  
28  
26  
24  
22  
20  
18  
16  
14  
12  
10  
8
39  
37  
35  
33  
31  
29  
27  
25  
23  
21  
19  
17  
15  
13  
11  
9
5.0V  
KR0  
KR1  
KR2  
KR3  
AFO  
SI  
OPINT  
OPCS  
BUSY  
BEEPOUT  
TONE  
BEEP  
DICSIN  
RFATT  
NOIS  
UNLK  
EXEN  
EXST  
DAST  
PLST  
OPT3  
OPT2  
OPT1  
OPV3  
OPV2  
OPV1  
PTT  
PTTIN  
DET  
PWON  
EXPTT  
DIMIN  
SO  
5.0V  
IC2  
S2  
S3  
S4  
S8  
S5  
S9  
S-80742SL-A6  
OPCS  
BUSY  
OPINT  
NOIS  
R18  
470  
KS0  
KS1  
3
4
2
1
S6  
P0  
S7  
P1  
5.0V  
C14  
0.47  
R4  
100k  
R45  
EXB-V8V  
(1kx4)  
R19  
470  
P2  
P3  
IC3  
25LC160T-I/SN  
Q1  
1
2
3
4
8
7
2SC4081  
CS VCC  
SO HOLD  
5
6
WP SCK  
5
5.0V  
VSS  
SI  
CSHIFT  
7
SCK  
VIN  
TEMP  
MIC  
6
4
2
5
3
1
SD  
LVIN  
R43  
12k  
Q3  
DTA143ZU  
D6  
MA8051  
X1  
CR-590  
L3  
47µ  
R8  
10  
DIM  
LIGHT ON :7.5V  
LIGHT OFF:5.5V  
to  
C18  
47p  
R7  
1M  
1
MAIN UNIT  
R55  
100k  
6.8MHz  
J1  
3.2V  
2.3V  
1.4V  
CONNECT  
WITH W3  
5V  
5V  
BEEP IS SET  
R58  
47k  
W2  
27.5mV  
0mV  
70mV  
0mV  
BEEP  
BEEPOUT  
DS2 ~ DS11  
SML-311YTx10  
-27.5mV  
-70mV  
Q4  
DTC144TU  
D2  
DA204U  
R22  
10  
5V  
CLON  
C37  
10  
J1  
8V  
CLONE  
AFO  
PTT  
MICE  
MIC  
GND  
AFO  
Q7  
2SC4081  
R33  
R36  
12k  
R37  
12k  
R39  
68k  
100k  
R69  
100k  
CTDA0  
CTDA1  
CTDA2  
Q6  
TX:5.0V  
RX:0.2V  
R21  
1k  
C82  
0.1  
R50  
100k  
2SC4081  
R27  
39k  
R30  
10k  
R31  
10k  
R34  
27k  
R40  
100k  
PTTIN  
MIC  
1
2
3
6
5
4
D3  
DA204U  
to  
MIC  
R60  
RV-150  
(10KB)  
L1 1µ  
R56  
5.6k  
R35  
10k  
R20 1k  
HANGER  
HANG  
D4  
DA204U  
Q10  
DTC144TU  
2
Q5  
XP4601  
5.0V  
3.3V  
1.9V  
0.5V  
BM  
November 1998  
Part No. 001-7600-001  
VHF/UHF FRONT UNIT SCHEMATIC  
8-11  
Download from Www.Somanuals.com. All Manuals Search And Download.  
UHF (7640) Transistor Basing Diagrams  
UHF (7640) Diode Basing Diagrams  
• TRANSISTORS AND FET'S  
• DIODES  
2SB1132 R  
2SB1143 S  
2SC4081 R  
2SC4215 O  
2SC4703 SE  
1SS352  
1T365  
DA221  
DAN202U  
1SS302  
(Symbol: BARB)  
(Symbol: BR)  
(Symbol: QO)  
(Symbol: SE)  
(Symbol: C1)  
(Symbol: pink line)N)  
(Symbol: K)  
(Symbol: N)  
(Symbol: C3)  
B
C
E
2SC5107 O  
2SC5110 O  
2SD1664 Q  
2SJ144 GR  
2SJ377  
DAN204U  
HVU350  
MA77  
MA111  
MA713  
(Symbol: MF)  
(Symbol: MGO)  
(Symbol: DA)  
(Symbol: VG)  
(Symbol: 4L)  
(Symbol: K)  
(Symbol: 4)  
(Symbol: 4B)  
(Symbol: 1B)  
(Symbol: MIN)  
D
S
G
D
S
D
G
G
S
2SK241 R (TX)  
2SK272  
2SK536  
2SK880 GR  
DTA143ZU  
MA8051 M (TX)  
(Symbol: K)  
(Symbol: BJ)  
(Symbol: XG)  
(Symbol: 113)  
(Symbol: 5-1)  
G
D
S
D
D
S
G2  
G1  
D
S
G2  
G1  
S
G
DTA144EU  
DTC114EU  
DTC144EU  
DTC144TU  
DTC363EK  
(Symbol: 16)  
(Symbol: 24)  
(Symbol: 26)  
(Symbol: 06)  
(Symbol: H27)  
XP4601  
XP6501  
(Symbol: 5C)  
(Symbol: 5N)  
November 1998  
8-12  
Part No. 001-7600-001  
Download from Www.Somanuals.com. All Manuals Search And Download.  

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