24
NOTES AND TROUBLESHOOTING
ENVIRONMENT
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CHECKS BEFORE REQUESTING SERVICE
There may be times when you suspect that your car radio is not functioning as you expect it
to. Before calling for service please read the operating / installing instructions and check the
following list. You may find that an apparent malfunction can easily be rectified.
Symptoms
Possible Cause / Remedy
General
Set does not function. No display.
• Check fuse (set and car) and connections.
Set functions but with no or poor sound.
• Adjust volume of set to demute set.
• Check fader and balance settings.
• Check the aerial and its connection.
• If car phone is connected, check setting
of ‘PHONE’ option, see ‘INITIAL SETTINGS’.
Set mutes when you drive the car
• Set ‘PHONE’ option to ‘NO’ see ‘INITIAL
or display shows ‘PHONE MUTE’.
SETTINGS’.
Detachable front of set feels warm.
Some heat is always generated by the set.
The sound from the speakers is reduced
A built-in safety circuit prevents the temperature
or display shows temperature ‘TEMP TOO
in the set from exceeding a certain level.
HOT’ when you try to increase the volume.
• Wait until ‘ TEMP TOO HOT’ does not appear
on the display when increasing the volume.
Volume fluctuates.
• Check SDVC connection and calibration.
If problems persist consult your dealer.
Speed warnings do not correspond with
• Redo speed calibration.
actual speed.
Display shows set’s specifications.
• See ‘DEMONSTRATION MODE’.
Infrared remote control
If the weather is cold, there may be some
does not function (optional).
condensation on the infrared sensor.
• Wait for about five minutes for the moisture
to evaporate.
Set turns off after one hour when operating
ON/OFF logic is active, see ‘INITIAL SETTINGS’
without the ignition key.
option ‘LOGIC’.
Radio
Poor radio reception.
• Check that the aerial is fully extended and
properly connected.
• Check that the negative terminal (brown lead)
is connected to earth (car chassis).
Some cars use an active aerial requiring
a 12 V supply.
• Check that this voltage is supplied.
RC749/849 GB 15/06/99 11:25 Page 24
