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Samsung 191T Serivce Manual page 18

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

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