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24 DB185MP
7. TROUBLESHOOTING
Problem Cause Measure
General
Power does not
turn on.
(No sound is
produced.)
Fuse is blown. Replace with a fuse of the same amperage. If the fuse
blows again, consult your store of purchase.
Incorrect wiring. Consult your store of purchase.
No sound output
when operating
the unit with
amplifiers or
power antenna
attached.
Power antenna lead is
shorted to ground or
excessive current is required
for remote-on the amplifiers
or power antenna.
1. Turn the unit off.
2. Remove all wires attached to the power antenna
lead. Check each wire for a possible short to
ground using an ohm meter.
3. Turn the unit back on.
4. Reconnect each amplifier remote wire to the power
antenna lead one by one. If the amplifiers turn off
before all wires are attached, use an external relay
to provide remote-on voltage (excessive current
required).
Nothing happens
when buttons are
pressed.
Display is not
accurate.
The microprocessor has
malfunctioned due to noise,
etc.
Turn off the power, then press
the [RELEASE] button and
remove the DCP.
Press the reset button for about
2 seconds with a thin rod.
DCP or main unit connectors
are dirty.
Wipe the dirt off with a soft cloth moistened with
cleaning alcohol.
No sound heard The speaker protection circuit
is operating.
1. Turn down sound volume. Function can also be
restored by turning the power off and on again.
(Speaker volume is reduced automatically when
the speaker protection circuit operates).
2. If the sound is muted again, consult our service
department.
CD/MP3/WMA
No sound heard MP3/WMA files are absent in
a disc.
Write MP3/WMA files onto the disc properly.
Files are not recognized as
an MP3/WMA file.
Use MP3/WMA files encoded properly.
File system is not correct. Use ISO9660 level 1, 2 or JOLIET or Romeo file
system.
Sound skips or is
noisy.
Compact disc is dirty. Clean the compact disc with a soft cloth.
Compact disc is heavily
scratched or warped.
Replace with a compact disc with no scratches.
Sound is cut or
skipped.
Noise is
generated or
noise is mixed
with sound.
MP3/WMA files are not
encoded properly.
Use MP3/WMA files encoded properly.
Sound is bad
directly after
power is turned
on.
Water droplets may form on
the internal lens when the car
is parked in a humid place.
Let dry for about 1 hour with the power on.
Wrong filename File system is not correct. Use ISO9660 level 1, 2 or JOLIET or Romeo file
system.
Reset button