Sony XR 7850 User Manual

FM/MW/SW  
Cassette Car  
Stereo  
EN  
Operating Instructions  
For installation and connections, see the supplied installation/connections  
manual.  
XR-7850  
1998 by Sony Corporation  
Table of contents  
Additional Information  
Getting Started  
Resetting the unit ................................................ 4  
Detaching the front panel .................................. 4  
Preparing the rotary commander ..................... 4  
Setting the clock .................................................. 5  
Precautions ......................................................... 10  
Maintenance ....................................................... 11  
Dismounting the unit ....................................... 12  
Location of controls .......................................... 13  
Specifications ..................................................... 14  
Troubleshooting guide ..................................... 15  
Index ................................................................... 16  
Cassette Player  
Listening to a tape ............................................... 5  
Playing a tape in various modes ....................... 6  
Radio  
Memorizing stations automatically  
— Best Tuning Memory (BTM) ................... 7  
Memorizing only the desired stations ............. 7  
Receiving the memorized stations.................... 7  
Other Functions  
Using the rotary commander ............................ 8  
Adjusting the sound characteristics ................. 9  
Attenuating the sound ....................................... 9  
Changing the sound and beep tone ................. 9  
EN  
3
Attaching the front panel  
Attach part A of the front panel to part B of  
the unit as illustrated and push until it clicks.  
Getting Started  
Resetting the unit  
Before operating the unit for the first time or  
after replacing the car battery, you must reset  
the unit.  
Press the reset button with a pointed object,  
such as a ball-point pen.  
A
B
Notes  
Make sure the front panel is the right way up when  
attaching it to the unit as it cannot be attached upside  
down.  
Do not press the front panel hard against the unit when  
attaching it to the unit. It can easily be attached by  
pressing it lightly against the unit.  
When you carry the front panel with you, put it in the  
supplied front panel case.  
Reset button  
Note  
Pressing the reset button will erase all the memorized  
program and memory functions.  
EN  
Do not press hard or put excessive pressure to the display  
windows of the front panel.  
Do not expose the front panel to direct sunlight, heat  
sources such as hot air ducts or leave it in a humid place.  
Never leave it on the dashboard etc. of a car parked in  
direct sunlight where there may be a considerable rise in  
temperature inside the car.  
Detaching the front panel  
The front panel of this unit can be detached to  
prevent the unit from being stolen.  
Caution alarm  
If you turn the ignition key to the OFF position  
without removing the front panel, the caution  
alarm will beep for a few seconds (only when  
the POWER SELECT switch is set to the A  
position). If you connect an optional power  
amplifier to the LINE OUT and do not use the  
built-in amplifier, the beep tone will be  
disabled.  
1 Press (OFF).  
2 Press (RELEASE) to detach the front  
panel then gently pull it out.  
(RELEASE)  
Preparing the rotary  
commander  
When you mount the rotary commander,  
attach the label in the illustration below.  
Notes  
• Be sure not to drop the panel when detaching it from the  
unit.  
• If you press (RELEASE) to detach the panel while the  
unit is still turned on, the power will automatically turn  
off to protect the speakers from being damaged.  
D
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D
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D
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4
Setting the clock  
The clock has a 12-hour digital indication.  
For example, setting it to 10:08  
Cassette Player  
1 Press (OFF) or (DSPL) during operation.  
Listening to a tape  
2 Press (DSPL) for two seconds.  
Insert a cassette.  
100  
The hour digit flashes.  
1 Set the hour digits.  
To go forward  
Playback will start automatically.  
To go backward  
If a cassette is already inserted, press  
(SOURCE) repeatedly until “TAPE” is  
displayed.  
1000  
2 Press (SEL) momentarily.  
EN  
TAPE  
1000  
The side facing up is being played.  
The minutes digits flashes.  
TAPE  
3 Set the minute digits.  
To go forward  
The side facing down is being played.  
To go backward  
1008  
Tip  
To change the tape transport direction, press (MODE)  
(*) during tape playback.  
To  
Press  
(OFF)  
6
Stop playback  
Eject the cassette  
3 Press (DSPL) momentarily.  
1008  
The clock starts.  
Fast-winding the tape  
During playback, press either side of  
(SEEK/AMS) for two seconds.  
Note  
If the POWER SELECT switch on the bottom of the unit is  
set to the B position, the clock cannot be set unless the  
power is turned on. Set the clock after you have turned on  
the radio.  
Fast-forward  
SEEK  
AMS  
Rewind  
To start playback during fast-forwarding or  
rewinding, press (MODE) (*).  
5
Locating the beginning of a track  
— Automatic Music Sensor (AMS)  
You can skip up to nine tracks at one time.  
Switching to the radio while fast-  
winding a tape  
— Automatic Tuner Activation (ATA)  
Press (5) during playback.  
“ATA” appears on the display.  
During playback, press either side of  
(SEEK/AMS) momentarily.  
When fast-forwarding or rewinding with  
(SEEK/AMS), the tuner will turn on  
automatically.  
To locate the succeeding tracks  
SEEK  
AMS  
To locate the preceding tracks  
To cancel this mode, press (5) again.  
Note  
The AMS function may not work when :  
• the blanks between tracks are shorter than 4 seconds  
• there is noise between tracks  
Skipping blanks during tape  
playback — Blank skip  
• there are long sections of low volume or quiet sections.  
Press (6) during playback.  
“BL SKIP” appears on the display.  
Changing the displayed items  
Each time you press (DSPL) during tape  
playback, the displayed item changes as  
follows:  
Blanks longer than eight seconds will  
automatically be skipped during tape  
playback.  
z Tape playback  
z Clock  
z Frequency*  
To cancel this mode, press (6) again.  
EN  
* While the ATA function is activated.  
Playing a tape in various  
modes  
Searching for the desired track  
— Intro scan  
Press (1) during playback.  
“INTRO” appears on the display.  
The first 10 seconds of all the tracks are played.  
When you find the desired track, press (1)  
again. The unit returns to the normal playback  
mode.  
To cancel this mode, press (1) again.  
Playing tracks repeatedly  
— Repeat play  
Press (2) during playback.  
“REP” appears on the display.  
When the current played track is over, it will  
be played again from the beginning.  
To cancel this mode, press (2) again.  
6
Memorizing only the  
desired stations  
Radio  
Up to 6 stations on each band (FM1, FM2, FM3,  
MW, SW1 and SW2) can be stored on the  
preset number buttons in the order of your  
choice. Therefore, 18 FM stations can be  
memorized.  
If you try to store another station on the same  
preset number button, the most recently stored  
station will be erased.  
Memorizing stations  
automatically  
— Best Tuning Memory (BTM)  
This function selects from the currently  
received band the stations with the strongest  
signals and memorizes them in order of their  
frequency.  
1 Press (SOURCE) repeatedly to select the  
tuner.  
PREVENTING ACCIDENTS!  
When tuning in while driving, use the  
automatic tuning instead of manual tuning.  
2 Press (MODE) repeatedly to select the  
band.  
3 Press (SEEK/AMS) to search for the  
station you wish to store on a preset  
number button.  
1 Press (SOURCE) repeatedly to select the  
tuner.  
Each time you press (SOURCE), the source  
changes as follows:  
EN  
4 Press the desired preset number button  
TAPE ˜ TUNER  
((1) to (6)) for two seconds.  
2 Press (MODE) repeatedly to select the  
band.  
The number of the selected preset number  
button appears on the display.  
Each time you press (MODE), the band  
changes as follows:  
FM1 n FM2 n FM3 n MW n SW1 n SW2  
3 Press (BTM) for two seconds.  
Receiving the memorized  
stations  
Notes  
• The unit will not store stations with weak signals on the  
preset number buttons. If there are only a few stations  
received, some preset number buttons will remain empty.  
• When a preset number indicated on the display, the unit  
starts storing station from the one currently display.  
1 Press (SOURCE) repeatedly to select the  
tuner.  
2 Press (MODE) repeatedly to select the  
band.  
3 Press the preset number button  
momentarily ((1) to (6)) on which the  
desired station is stored.  
7
Changing the displayed items  
Each time you press (DSPL), the display  
changes between the frequency and the clock.  
Other Functions  
If you cannot tune in a preset  
station  
Press either side of (SEEK/AMS)  
momentarily to search for the station  
(automatic tuning).  
Scanning stops when a station is received.  
Press either side of (SEEK/AMS) repeatedly  
until the desired station is received.  
Using the rotary  
commander  
The rotary commander works by pressing  
buttons and/or rotating controls.  
By pressing buttons (the SOURCE  
and the MODE buttons)  
Note  
If the automatic tuning stops too frequently, press  
(LCL) to lights up “LCL” on the display (local seek mode).  
Only the stations with relatively strong signals can be  
tuned in.  
Tip  
If you know the frequency, press and hold either side of  
(SEEK/AMS) until the desired station is received (manual  
tuning).  
(SOURCE)  
EN  
(MODE)  
Every time you press (SOURCE), the  
source changes as follows:  
TAPE n TUNER  
Pressing (MODE) changes the operation in the  
following ways:  
• the tape transport direction.  
• the band, FM1 n FM2 n FM3 n MW n  
SW1 n SW2.  
Tip  
You can turn on this unit by pressing (SOURCE) on the  
rotary commander.  
By rotating the control (the SEEK/  
AMS control)  
Rotate the control momentarily and  
release it to:  
• Locate the beginnings of the tracks on the  
tape. Rotate and hold the control, and  
release it to fast-wind the tape. To  
playback, rotate and hold the control  
again, and release it.  
• Tune in the stations automatically.  
Rotate and hold the control to tune in the  
specific station.  
8
By rotating the control while  
pushing in (the PRESET/DISC  
control)  
Adjusting the sound  
characteristics  
1 Select the item you want to adjust by  
pressing (SEL) repeatedly.  
VOL (volume) n BAS (bass) n TRE  
(treble) n BAL (left-right) n FAD  
(front-rear)  
Push in and rotate the control to:  
Receive the stations memorized on the  
preset buttons.  
2 Adjust the selected item by pressing  
either (+) or (–).  
Adjust within three seconds after selecting.  
(After three seconds the button will again  
serve as the volume control button.)  
Other operations  
Rotate the VOL control  
to adjust the volume.  
Press (ATT)to  
attenuate the  
sound.  
Attenuating the sound  
EN  
Press (ATT).  
The “ATT” indication flashes.  
Press(OFF) to  
turn off the unit.  
To restore the previous volume level, press  
again.  
Press (SEL)  
to adjust  
and select.  
Tip  
The unit decreases the volume automatically when a  
telephone call comes in (Telephone-ATT function).  
Press (DSPL) to change  
the display items.  
Changing the operative direction  
The operative direction of controls is factory  
preset as in the illustration below.  
Changing the sound and  
beep tone  
To increase  
Boosting the bass sound — D-Bass  
You can enjoy clear and powerful bass sound.  
The D-bass function boosts the low frequency  
singal with a sharper curve than conventional  
bass boost.  
You can hear the bass line more clearly even if  
the vocal volume remains the same. You can  
emphasize and adjust the bass sound easily  
with the D-bass control. This effect is similar to  
the one you get when you use an optional  
subwoofer system.  
To decrease  
If you need to mount the rotary commander  
on the right side of the steering column, you  
can reverse the controls‘ operative direction.  
Analog D-BASS  
D-BASS 3  
D-BASS 2  
D-BASS 1  
0dB  
Press (SEL) for two seconds while  
pushing in the VOL control.  
Frequency (Hz)  
9
Adjusting the bass curve  
Additional  
Information  
Turn the D-BASS control to adjust the  
bass level (1, 2 or 3).  
“D-BASS” appears in the display.  
To cancel, turn the control to the OFF position.  
Note  
Precautions  
If your car was parked in direct sunlight  
resulting in a considerable rise in  
temperature inside the car, allow the unit to  
cool off before operating it.  
If no power is being supplied to the unit,  
check the connections first. If everything is in  
order, check the fuse.  
If the bass sound becomes distorted, adjust the D-BASS  
control or the volume button.  
Attenuating the beep tone  
Press (6) while pressing (SEL).  
To obtain the beep tone again, press these  
buttons again.  
If no sound comes from the speakers of a  
2-speaker system, set the fader control to the  
center position.  
When the tape is played back for a long  
period, the cassette may become warm  
because of the built-in power amplifier.  
However, this is not a sign of malfunction.  
Note  
If you connect an optional power amplifier to the LINE  
OUT and do not use the built-in amplifier, the beep tone  
will be disabled.  
EN  
If you have any questions or problems  
concerning your unit that are not covered in  
this manual, please consult your nearest Sony  
dealer.  
To maintain high quality sound  
If you have drink holders near your audio  
equipment, be careful not to splash juice or  
other soft drinks onto the car audio. Sugary  
residues on this unit or cassette tapes may  
contaminate the playback heads, reduce the  
sound quality, or prevent sound reproduction  
altogether.  
Cassette cleaning kits cannot remove sugar  
from the tape heads.  
10  
Notes on Cassettes  
Cassette care  
Maintenance  
Fuse Replacement  
When replacing the fuse, be sure to use one  
matching the amperage rating stated on the  
original fuse. If the fuse blows, check the  
power connection and replace the fuse. If the  
fuse blows again after replacement, there may  
be an internal malfunction. In such a case,  
consult your nearest Sony dealer.  
Do not touch the tape surface of a cassette, as  
any dirt or dust will contaminate the heads.  
Keep cassettes away from equipment with  
built-in magnets such as speakers and  
amplifiers, as erasure or distortion on the  
recorded tape could occur.  
Do not expose cassettes to direct sunlight,  
extremely cold temperatures or moisture.  
Slack in the tape may cause the tape to be  
caught in the machine. Before you insert the  
tape, use a pencil or similar object to turn the  
reel and take up any slack.  
Fuse (10 A)  
Slack  
Warning  
Never use a fuse with an amperage rating  
exceeding the one supplied with the unit as  
this could damage the unit.  
EN  
Distorted cassettes and loose labels can cause  
problems when inserting or ejecting tapes.  
Remove or replace loose labels.  
Cleaning the Connectors  
The unit may not function properly if the  
connectors between the unit and the front  
panel are not clean. In order to prevent this,  
open the front panel by pressing (RELEASE),  
then detach it and clean the connectors with a  
cotton swab dipped in alcohol. Do not apply  
too much force. Otherwise, the connectors may  
be damaged.  
Cassettes longer than 90 minutes  
The use of cassettes longer than 90 minutes is  
not recommended except for long continuous  
play. The tapes used for these cassettes are  
very thin and tend to be stretched easily.  
Frequent playing and stopping of these tapes  
may cause them to be pulled into the cassette  
deck mechanism.  
Main unit  
Back of the front panel  
11  
Dismounting the unit  
1
Release key (supplied)  
2
3
4
EN  
12  
Location of controls  
INTRO  
REPEAT  
2
MODE  
1
3
BL SKIP  
6
SOURCE  
OFF  
ATA  
4
5
SEEK  
AMS  
SEL  
BTM  
LCL  
1
OFF  
2
3
DSPL  
D-BASS  
RELEASE  
ATT  
EN  
Refer to the pages for further details.  
0 ATT button 9  
1 SEEK/AMS button 5, 6, 7, 8  
SEL (control mode select) button 5, 9, 10  
2 SOURCE button (TAPE/TUNER) 5, 7  
!™ POWER SELECT switch (located on the  
bottom of the unit)  
3 (+)(–) (volume/bass/treble/left-right/  
front-rear control) button 5, 9  
See “POWER SELECT Switch” in the  
Installation/Connections manual.  
4 MODE (*) button  
During tuner reception:  
BAND select 7  
Frequency Select switch (located on the  
bottom of the unit)  
During tape playback:  
Transport direction change 5  
See “Frequency Select Switch” in the  
Installation/Connections manual.  
5 OFF button 4, 5  
Display window  
6 6 (eject) button 5  
!∞ BTM (Best tuning memory) button 7  
7 During radio reception:  
DSPL (display mode change/time set)  
Preset number buttons 7  
button 5, 6, 8  
During tape playback:  
(1) INTRO button 6  
LCL button 8  
(2) REPEAT button 6  
!• D-BASS control 9  
(5) ATA (Automatic Tuner  
Activation) button 6  
(6) BL SKIP (Blank Skip) button 6  
When the positions of switch !™ and is  
altered, be sure to press the reset button after  
connecting power.  
8 RELEASE (front panel release) button  
4, 11  
9 Reset button (located on the front side  
of the unit hidden by the front panel)  
Press this button when you use this unit  
for the first time, when you have changed  
the car battery, or when the buttons of this  
unit do not function properly.  
13  
Specifications  
General  
Outputs  
Power antenna control  
lead/Power amplifier  
control lead/Telephone  
ATT control lead  
Rear line out (1)  
Tone controls  
Bass ±8 dB at 100 Hz  
Treble ±8 dB at 10 kHz  
12 V DC car battery  
(negative ground)  
Approx. 188 × 58 × 181  
mm (w/h/d)  
Power requirements  
Dimensions  
Mounting dimensions  
Approx. 182 × 53 × 164 mm  
(w/h/d)  
Mass  
Supplied accessories  
Approx. 1.2 kg  
Parts for installation and  
connections (1 set)  
Front panel case (1)  
Rotary commander  
RM-X4S (1)  
Harmonic distortion at 1 kHz  
0.5 % (stereo),  
Design and specifications are subject to change without  
notice.  
0.3 % (mono)  
35 dB at 1 kHz  
30 – 15,000 Hz  
2 dB  
EN  
Separation  
Frequency response  
Capture ratio  
MW  
Tuning range  
MW tuning interval:  
9kHz/10kHz switchable  
531 – 1,602kHz  
(at 9kHz step)  
530 – 1,710kHz  
(at 10kHz step)  
Antenna terminal  
External antenna connector  
Intermediate frequency 10.71 MHz/450kHz  
Sensitivity  
30 µV  
SW  
Tuning range  
SW tuning interval:  
SW1 :2,940 – 7,735kHz  
SW2 :9,500 – 18,135kHz  
(except for 10,140 –  
11,575kHz)  
Antenna terminal  
External antenna connector  
Intermediate frequency 10.71 MHz/450kHz  
Sensitivity  
50 µV  
Power amplifier section  
Outputs  
Speaker outputs  
(sure seal connectors)  
4 – 8 ohms  
Speaker impedance  
Maximum power output 35 W × 4 (at 4 ohms)  
14  
Troubleshooting guide  
The following checklist will assist in the correction of most problems you may encounter with your  
unit.  
Before going through the checklist below, refer to the operating procedures.  
General  
Problem  
Cause/Solution  
No sound.  
Adjust the volume with (+).  
Set the fader control to the center position for 2-speaker  
systems.  
Remove the front panel and clean the connectors. See “Cleaning  
the Connectors” in “Maintenance” for details.  
Indications do not appear on  
the display.  
No beep tone.  
An optional power amplifier is connected to the LINE OUT  
and you are not using the built-in amplifier.  
The beep tone is attenuated.  
Tape playback  
Problem  
Cause/Solution  
EN  
Playback sound is distorted.  
Contamination of the tape head. n Clean the head.  
The AMS does not operate  
correctly.  
There is noise in the space between tracks.  
A blank space is too short (less than four seconds).  
+ on (SEEK/AMS) is pressed immediately before the  
following track.  
= on (SEEK/AMS) is pressed immediately after the track  
starts.  
A long pause, or a passage of low frequencies or very low  
sound level is treated as a blank space.  
Radio reception  
Problem  
Cause/Solution  
Preset tuning is not possible.  
Store the correct frequency.  
The broadcast is too weak.  
Automatic tuning is not possible. The broadcast is too weak. n Use manual tuning.  
If the above-mentioned solutions do not help to improve the situation, consult your nearest Sony  
dealer.  
15  
Index  
A
ATT  
Automatic Music Sensor (AMS)  
Automatic tuning  
Automatic Tuner Activation (ATA)  
9
6
8
6
B
C
BAL (left-right)  
BAS (bass)  
Best Tuning Memory (BTM)  
Blank skip  
9
9
7
6
Caution alarm  
Clock  
4
5
D, E  
D-BASS (D-Bass)  
9
EN  
Display  
6
F, G, H  
FAD (front-rear)  
9
Fast-forward  
Front panel  
Fuse 11  
5
4
I, J, K  
Intro scan  
6
L
Local seek mode (LCL)  
8
M, N, O, P, Q  
Manual tuning  
8
R, S  
Radio  
Repeat play  
Reset  
Rewind  
7
6
4
5
Rotary commander 4, 8  
T, U, V, W, X, Y, Z  
Tape playback  
5
Telephone-ATT  
9
TRE (treble)  
9
16  

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