Samsung LA22B450C4H, Service Manual

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4-22
4. Troubleshooting
4-1-9. No Sound
Symptom Video is normal but there is no sound..
-
Major
checkpoints
When the speaker connectors are disconnected or damaged.
When the sound processing part of the Main Board is not functioning.
Speaker defect..
-
-
-
Diagnostics
Check CN5002(COMP), CN5011
(PC, DVI), CN7005(AV), JA3201_
EU(SCART) Change the Main Assy
No
Yes
Does the B12VS_PW
appear at TP2007~8?
No
Yes
Check the source and
check the connection of sound cable
(Comp/PC/DVI to HDMI).
Yes
Change the Main Assy
Does the sound data appear at
CN5002(COMP), CN5011(PC, DVI),
CN7005(AV), JA3201_EU(SCART)?
No
Input the sound source properly.
Yes
Replace speaker
Please, Contact Tech support
No
Does the sound data appear at
TP - L-, L+, R-, R+?
No
Check IC4010 (Saturn4)
Check IC9002 (Sound AMP)
Change the Main Assy
7
Caution Make sure to disconnect the power before working on the IP board.