Samsung LA22B450C4H Service Manual page 218

4. Troubleshooting
4-1-9. 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.
-
checkpoints
Speaker defect..
-
Diagnostics
7
Caution Make sure to disconnect the power before working on the IP board.
4-22
Check the source and
check the connection of sound cable
(Comp/PC/DVI to HDMI).
Yes
Does the sound data appear at
CN5002(COMP), CN5011(PC, DVI),
CN7005(AV), JA3201_EU(SCART)?
Yes
Does the B12VS_PW
appear at TP2007~8?
Yes
Does the sound data appear at
TP - L-, L+, R-, R+?
Yes
Replace speaker
No
Input the sound source properly.
Check CN5002(COMP), CN5011
No
(PC, DVI), CN7005(AV), JA3201_
EU(SCART) Change the Main Assy
No
Change the Main Assy
Check IC4010 (Saturn4)
No
Check IC9002 (Sound AMP)
Change the Main Assy
No
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