Notes And Troubleshooting - VDO CD 3300 User Instructions

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
General
Set does not function. No display.
Set functions but with no or poor sound.
Set mutes when you drive the car
or display shows 'PHONE MUTE'.
Detachable front of set feels warm.
The sound from the speakers is reduced
or display shows temperature 'TEMP TOO
HOT' when you try to increase the volume.
Volume fluctuates.
Speed warnings do not correspond with
actual speed.
Display shows set's specifications.
Infrared remote control
does not function (optional).
Set turns off after one hour when operating
without the ignition key.
Radio
Poor radio reception.
24
Possible Cause / Remedy
• Check fuse (set and car) and connections.
• 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 'PHONE' option to 'NO' see 'INITIAL
SETTINGS'.
Some heat is always generated by the set.
A built-in safety circuit prevents the temperature
in the set from exceeding a certain level.
• Wait until ' TEMP TOO HOT' does not appear
on the display when increasing the volume.
• Check SDVC connection and calibration.
If problems persist consult your dealer.
• Redo speed calibration.
• See 'DEMONSTRATION MODE'.
If the weather is cold, there may be some
condensation on the infrared sensor.
• Wait for about five minutes for the moisture
to evaporate.
ON/OFF logic is active, see 'INITIAL SETTINGS'
option 'LOGIC'.
• 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.