
21
Troubleshooting
If you suspect something wrong
Check and take steps as described below.
If the described suggestions do not solve the problem, it is
recommended to take the unit to your dealership. The
product should be serviced only by qualified personnel.
Please refer the checking and the repair to professionals.
We shall not be liable for any accidents arising out of
neglect of checking the unit or your own repair after your
checking.
Never take measures especially for those other than indi-
cated by
italic
letters in “Possible Solution” described
below because those are too dangerous for users to han-
dle themselves.
Warning
¡
Do not use the unit in an irregular condi-
tion, for example, without sound, or with
smoke or a foul smell, which can cause
ignition or electric shock. Immediately
stop using the unit and consult your deal-
ership.
¡
Never try to repair the unit by yourself
because it is dangerous to do so.
Problem
Possible cause
a
Possible solution
No power to the unit
The power cord (battery, power and ground) is connected in the
wrong way.
a
Check the wiring.
Sound is not generated.
MUTE is set to ON.
a
Set MUTE to OFF.
There is contact between the external mute lead and the chassis.
a
Connect the external mute lead correctly. If the lead is unused,
insulate it.
The wiring of speaker lines are not correct, or a break or poor
contact arises.
a
Check the wiring in accordance with the wiring diagram.
Noise
There is an electromagnetic-wave generator such as a cellular phone
near the unit or its electrical lines.
a
Keep an electromagnetic-wave generator such as a cellular
phone away from the unit and the wiring of the unit. In case that
noise cannot be eliminated due to the wiring harness of the
truck, consult your dealership.
The contact of the ground lead is poor.
a
Make sure that the ground lead is connected to an unpainted
part of the chassis securely.
Noise is made in step with
engine revolutions.
Alternator noise comes from the truck.
a
Change the wiring position of the ground lead.
a
Mount a noise filter on the power supply.
Common
Some operations are not
executable.
Some operations are not executable in particular modes such as
menu mode.
a
Read the operating instructions carefully and cancel the mode.
If the unit is still out of order, consult your dealership.
CQ̲5255U 10/01/08 14:21
ページ
21 (
ブラック
版
)
Содержание PP103910
Страница 33: ...33 Memorandum ...
Страница 34: ...34 Memorandum ...
Страница 35: ...35 ...
Страница 36: ...YFM264C212CA PTW1009 1119 Printed in China ...