Samsung PL-42Q91HDP Service Manual page 32

No Sound
■ ■
Symptom - Video is normal but there is no sound.
- When the speaker connectors are disconnected or damaged.
Major Checklist - When the sound processing part of the Main Board is not functioning.
- Speaker defect.
Troubleshooting
Procedures
Samsung Electronics
Is the cable connection between the
①
Main Board and the speaker
properly connected?
Yes
Is the output voltage of SMPS normal?
②
(CN801 #13)
Yes
Is the speaker output terminal
of the Main Board normal?
Yes
③
Replace the Speaker
No
Connect the cable properly or
replace the cable, if necessary.
No
Replace the SMPS
No
Replace the Main Board
Troubleshooting
4-5