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
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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-
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
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
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
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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-
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
in Figure 2-5.
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-
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).
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
• “Tx Code CH” and program the information in
Figure 2-7 2/5-Tone Module Installation
• “User Tone” and program the information in the
2.7.2 2-TONE PROGRAMMING
• “Memory CH” and program the parameters in
this screen that are related to 5-tone operation on
Program the transceiver for operation with a two-
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
(see Table 4-1).
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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
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
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.
Accessory Cable - This optional cable is used to con-
nect accessories such as a horn alert and modem to the
F1/F2/F3/F4 - These keys can be programmed to con-
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
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
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-
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
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
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
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
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
“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
Refer to Section 3.3.9.
3.5.3 BANK SELECT
Refer to Section 3.3.7.
3.5.4 BEEP ON-OFF
Refer to Section 3.3.10.
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
Refer to Section 3.4.4.
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
Refer to Section 3.3.5.
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
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
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
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-
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
- 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
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).
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
which programs miscellaneous information such as
various timer settings.
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
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)
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
(see Table 4-7).
Key and Display Assign - Displays the screen shown
programmable keys.
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
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
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
models.
4.4.7 SETUP MENU
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
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
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.
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
LOCK Locks/unlocks all programmable keys except CALL, MONI, and EMER to prevent them from being
Beep
Light
Bank Up
High
Low 1
Low 2
LITE
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
grammed by the Continuous Tone screen described in Table 4-4.
Talk
TA
Around
Wide/
Narrow
W/N
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
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
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
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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
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
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
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
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
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
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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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.
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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PROGRAMMING
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
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
SQL Level Sets the squelch level in up to 255 steps (0 sets the maximum unsquelched level). This adjustment can be more
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.
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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
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
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
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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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
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
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
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-
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.
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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
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
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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.
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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
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-
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.
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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.
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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.
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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
50kΩ/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
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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
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
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
grammed as regular channels using the programming
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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
Model (see Section 1.4)
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-
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
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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
2. Connect the computer test setup using the test cable
program as described.
1. Using the programming software, read (download)
the data programmed in an exact same version of
information on reading data.
3. Connect a DC power supply and a 50-ohm, 50-watt
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
in Figure 6-4.
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
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
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
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
in Figure 6-6.
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
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
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
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.
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PARTS LIST
SECTION 7 PARTS LIST
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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
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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
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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
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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
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7-5
Part No. 001-7600-001
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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
5HIý1Rï
'HVFULSWLRQ
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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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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
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&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
3DUWý1Rï
5HIý1Rï
'HVFULSWLRQ
3DUWý1Rï
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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
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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
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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
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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
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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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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)
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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)
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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
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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)
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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)
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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)
Download from Www.Somanuals.com. All Manuals Search And Download.
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
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5V
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BPF
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Q14
Q12
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5V
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D
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C
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IC6b
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N
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M
M
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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
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November 1998
8-7
UHF (7640) MAIN BOARD BOTTOM VIEW
Part No. 001-7600-001
FOLDOUT
→
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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:50kΩ/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
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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:50kΩ/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
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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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