Samsung 191T Car Video System User Manual


 
4 Troubleshooting
GH19B* 4-5
CONFIDENTIAL
4-1-4 No Sound
Does proper DC 12V appear at
Pin 7, 8 of Q109?
Check Q109 and related circuit.
Yes
No
Does proper DC 12V appear
at Pin1 of CN504?
Check IC741 and related circuit.
Yes
No
Check audio.