AV
AV
AV
AV
Audio/
Audio/
Audio/
Audio/ Video
Video
Video
Video System
System
System
System
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Diagnosis
Diagnosis
Diagnosis
Diagnosis and
and
and
and Testing
Testing
Testing
Testing
Troubleshooting
Troubleshooting
Troubleshooting
Troubleshooting
3. Loudspeaker failed to operate.
Step Operation
Yes
No
1 D oes every loudspeaker fail to operate? Go to Step 6. Go to Step 2.
2
R egulate the radio balance and find out the suspected loudspeaker.
D oes this loudspeaker operate normally?
Go to Step 3. Go to Step 3.
3
① Remove the radio.
②
Use an appropriate jumper to make instantaneous contact with the 1.5V battery
in relevant loudspeaker circuit.
I s there any bang of loudspeaker?
Go to Step 7. Go to Step 4.
4
Test relevant loudspeaker circuit for open circuit or too high voltage.
Is the fault detected and eliminated?
Go to Step 10. Go to Step 5.
5
C heck loudspeaker for poor contact.
Is the fault detected and eliminated?
Go to Step 10. Go to Step 8.
6
T
est every loudspeaker circuit for short circuit to positive battery voltage or ground.
Is the fault detected and eliminated?
Go to Step 10. Go to Step 7.
7
C heck radio harness connector for poor contact.
Is the fault detected and eliminated?
Go to Step 10. Go to Step 9.
8
R eplace relevant loudspeaker.
I f the replacement finished?
Go to Step 10. —
9
Replace the radio.
Is the maintenance finished?
Go to Step 10. —
10
R eplace the failed system.
D oes the system return to normal?
Go to Step 1. System is intact.
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