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Troubleshooting
E
N
G
L
I
Preliminary Steps
S
H
Check and take steps as described in the tables below.
32
Problem Happens
Immediately switch power off.
Disconnect the power cable and check that there is neither
smoke nor heat from the unit before asking for repairs. Never
try to repair the unit yourself because it is dangerous to do so.
3
Common
Trouble
No power
No sound
Buttons unusable
The sound quality is poor
and/or noise is generated
when the external amplifi-
er is used.
42
CQ-DRX901U
Cause
Car's engine switch is not on.
Cables are not correctly
connected.
Battery cable is not correctly
connected.
Accessory cable is not correctly
connected.
Grounding wire is not correctly
connected.
Fuse is burnt.
Mute is set to ON
Cables are not correctly
connected.
External-mute cable is not
correctly connected (The word
MUTING is shown.)
Condensation (dew)
Spectrum analyzer is in demo
mode.
Gain of the amplifier is too large.
Caution:
Do not use the unit if it malfunctions or
something is wrong.
Do not use the unit in abnormal condition,
for example, without sound, or with smoke
or foul smell, can cause ignition or electric
shock. Immediately stop using it and call
the store where you purchased it.
Step
Turn your car's ignition switch to ACC or ON.
Connect cables correctly.
Connect the battery cable to the terminal that is always
live.
Connect the accessory cable to your car's ACC source.
Connect the grounding wire to a metal part of the car.
Call the store where you purchased the unit, or your
nearest service station (see the attached sheet) and ask
for fuse replacement.
Set it to OFF.
Connect cables correctly.
Keep the orange cap covered for insulation if this lead is
not used.
Wait for a while before use.
Press [DISP] to cancel demo mode.
Set the gain of the external amplifier to the medium for
operation.
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