Sony XR-3750 User manual

1997 by Sony Corporation
3-859-576-11 (1)
Operating Instructions
Manual de instrucciones
Bruksanvisning
Manual de instruções
EN
FM/MW/LW
Cassette Car
Stereo
XR-3750
For installation and connections, see the supplied installation/connections
manual.
Con respecto a la instalación y las conexiones, consulte el manual de Instalación/
Conexiones suministrado.
Vi hänvisar till det medföljande häftet angående montering/anslutningar.
Para a instalação e as ligações, consulte o manual de instalação/ligações
fornecido.
ES
S
P

2
EN
Welcome!
Thank you for purchasing the Sony Cassette
Car Stereo. This unit lets you enjoy a variety of
features by using a rotary remote.

3
EN
Additional Information
Precautions........................................................... 9
Maintenance....................................................... 10
Dismounting the unit ....................................... 11
The rotary remote labels .................................. 11
Location of controls .......................................... 12
Specifications ..................................................... 13
Troubleshooting guide ..................................... 14
Index ................................................................... 15
Table of contents
Getting Started
Resetting the unit ................................................ 4
Detaching the front panel .................................. 4
Setting the clock .................................................. 5
Cassette Player
Listening to a tape ............................................... 5
Playing a tape in various modes ....................... 6
Radio
Memorising stations automatically
— Best Tuning Memory (BTM) ................... 7
Memorising only the desired stations.............. 7
Receiving the Memorised stations.................... 7
Other Functions
Adjusting the sound characteristics ................. 8
Muting the sound................................................ 8
Changing the sound and beep tone ................. 8

4
EN
Attaching the front panel
Attach part Aof the front panel to part Bof
the unit as illustrated and push until it clicks.
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.
•Do not press hard or give 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.
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).
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 ballpoint pen.
Note
Pressing the reset button will erase all the Memorised
programme and memory functions.
Detaching the front panel
The front panel of this unit can be detached to
prevent the unit from being stolen.
1Press (OFF).
2Press (RELEASE) to open up the front
panel, and detach the panel by pulling it
towards you.
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.
BA
Reset button
(RELEASE)

5
EN
Setting the clock
The clock has a 24-hour digital indication.
For example, setting it to 10:08
1Press (OFF) or (DSPL) during operation.
2Press (DSPL) for two seconds.
1Set the hour digits.
2Press (SEL) momentarily.
3Set the minute digits.
3Press (DSPL) momentarily.
Note
If the POWER SELECT switch on the top of the unit is set
to the Bposition, the clock cannot be set unless the power
is turned on. Set the clock after you have turned on the
radio.
The hour digit flashes.
To go backward
To go forward
The minutes digits flashes.
To go backward
To go forward
The clock starts.
Getting Started/Cassette Player
Cassette Player
Listening to a tape
Insert a cassette.
Playback will start automatically.
If a cassette is already inserted, press
(SOURCE) repeatedly until “TAPE” is
displayed.
The side facing up is being played.
The side facing down is being played.
Tip
To change the tape transport direction, press (MODE)
(*) during tape playback.
Fast-winding the tape
During playback, press either side of
(SEEK/AMS) for two seconds.
To start playback during fast-forwarding or
rewinding, press (MODE) (*).
Press
(OFF)
6
To
Stop playback
Eject the cassette
Fast-forward
Rewind
100

1000

1000

1008

1008

TAPE

TAPE

SEEK
AMS

6
EN
SEEK
AMS
To locate the succeeding tracks
To locate the preceding tracks
Switching to the radio while fast-
winding a tape
— Automatic Tuner Activation (ATA)
Press (5) during playback.
“ATA” appears on the display.
When fast-forwarding or rewinding with
(SEEK/AMS) for two seconds, the tuner will
turn on automatically.
To cancel this function, press (5).
Skipping blanks during tape
playback — Blank skip
Press (6) during playback.
“BL.SKIP” appears on the display.
Blanks longer than eight seconds will
automatically be skipped during tape
playback.
To cancel this function, press (6).
Playing a CrO2or metal tape
Press (4) when you want to listen to a
CrO2(TYPE II) or metal (TYPE IV) tape.
“MTL” appears on the display.
To cancel this function, press (4).
Locating the beginning of a track
— Automatic Music Sensor (AMS)
You can skip up to nine tracks at one time.
During playback, press either side of
(SEEK/AMS) momentarily.
Note
The AMS function may not work when :
• the blanks between tracks are shorter than 4 seconds
• there is noise between tracks
• there are long sections of low volume or quiet sections.
Changing the displayed items
Each time you press (DSPL) momentarilly
during tape playback, the displayed item
changes as follows:
zTape playback zClock zFrequency*
* 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 again.
The unit returns to the normal playback mode.
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 again.

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EN
Cassette Player/Radio
Memorising only the
desired stations
Up to 6 stations on each band (FM1, FM2, FM3,
MW and LW) can be stored on the preset
number buttons in the order of your choice.
Therefore, 18 FM stations can be Memorised.
If you try to store another station on the same
preset number button, the previously stored
station will be erased.
1Press (SOURCE) repeatedly to select the
tuner.
2Press (MODE) repeatedly to select the
band.
3Press (SEEK/AMS) to search for the
station you wish to store on a preset
number button.
4Press the desired preset number button
((1) to (6)) for two seconds.
The number of the selected preset number
button appears on the display.
Receiving the Memorised
stations
1Press (SOURCE) repeatedly to select the
tuner.
2Press (MODE) repeatedly to select the
band.
3Press the preset number button ((1) to
(6)) momentarily on which the desired
station is stored.
Radio
Memorising stations
automatically
— Best Tuning Memory (BTM)
This function selects from the currently
received band the stations with the strongest
signals and Memorises them in order of their
frequency.
PREVENTING ACCIDENTS!
When tuning in while driving, use the
automatic tuning instead of manual tuning.
1Press (SOURCE) repeatedly to select the
tuner.
Each time you press (SOURCE), the source
changes as follows:
TAPE ˜TUNER
2Press (MODE) repeatedly to select the
band.
Each time you press (MODE), the band
changes as follows:
FM1 nFM2 nFM3 nMW nLW
3Press (BTM) for two seconds.
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 there is a preset number indicated on the display,
the unit will store stations on all preset number buttons
from the one currently displayed.

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EN
Changing the displayed items
Each time you press (DSPL), the display
changes between the frequency and the clock.
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 the button repeatedly
until the desired station is received.
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).
Other Functions
Adjusting the sound
characteristics
1Select the item you want to adjust by
pressing (SEL) repeatedly.
VOL (volume) nBAS (bass) nTRE
(treble) nBAL (balance) nFAD (fader)
2Adjust 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.)
Muting the sound
Press (MUTE).
The “MUTE” indication flashes.
To restore the previous volume level, press
again.
Changing the sound and
beep tone
Boosting the bass sound — D-Bass
To enjoy clear and powerful bass sound, you
can boost only the low frequency signal with a
sharp curve. This is the effect you get when
use an optional subwoofer system.
For example, you can hear the bass line more
clearly even if the vocal sound is the same
volume. You can emphasize and adjust the
bass sound easily with the D-BASS control.

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EN
Additional
Information
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 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.
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.
Adjusting the bass curve
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.
Muting the beep tone
Press (6) while pressing (SEL).
To obtain the beep tone again, press these
buttons again.
Analog D-BASS
Level
Frequency (Hz)
0dB
D-BASS 3
D-BASS 2
D-BASS 1
Radio/Other Functions/Additional Information

10
EN
Notes on Cassettes
Cassette care
•Do not touch the tape surface of a cassette, as
any dirt or dust will contaminate the heads.
•Keep cassettes ataryway 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.
•Distorted cassettes and loose labels can cause
problems when inserting or ejecting tapes.
Remove or replace loose labels.
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.
Slack
Maintenance
Fuse Replacement
When replacing the fuse, be sure to use one
matching the amperage rating stated on the
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.
Warning
Never use a fuse with an amperage rating
exceeding the one supplied with the unit as
this could damage the unit.
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.
Fuse (10 A)
Main unit
Back of the front panel