Samsung GH15H series Service Manual page 16

4 Troubleshooting
4-5 No SOUND
Does the DC 12V appear
at Pin 15, 16 of IC401 and
Pin 5, 6, 7, 8 of Q403?
Yes
Does the sound input signal
appear at Pin 4 and 9 of IC401?
Yes
Does the sound signal appear at
Pin 14 and 17 of IC401?
Yes
Check CN402 outputs.
GH15H*
No
Check Q403, Q401 and related circuit.
No
Check CN401
and related circuit.
No
Check IC401 and related circuit.
CONFIDENTIAL
4-5