Service manual

24
TROUBLESHOOTING HINTS
Is
Audio-in OK?
(pin 10, 14 at U7)
No Sound
No
No
Yes
Yes
Is VCC(Pin15,16)
of Audio IC(U7)
12V?
Check Audio-in
jack(J1).
Check speaker.
No
Yes
Is Audio-out
OK?
Check VCC 12V line.
Is Mute ON?
Change Mute OFF.
Yes
No
Check Auido IC(U7).
7. Sound Problem