Samsung PPM63M7FS Service Manual page 25

Troubleshooting
■ No Sound
Symptom - Video is normal but there is no sound.
- when the speaker connectors are disconnected or damaged.
Major
- when the sound processing part of the Main Board is not functioning.
Checklist
- Speaker defect.
③
Troubleshooting
Procedures
4-4
①
Is the cable connection between the Main
Board and the speaker properly connected?
Yes
②
Check that the voltage of No.7,8 pin of
SMPS CN801 has 18V
Yes
Is the speaker output terminal of the Main
Board normal?
Yes
③
Replace the Speaker
No
Cable Connection
No
Replace the SMPS
No
Replace the
Main Board
②
①
③
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