Samsung LN26C450E1H Service Manual page 42

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..
Check the source and check the connection of
Check the component source and check the
connection of component cables (Y,Pb,Pr) ?
Diagnostics
TP - COMP1_SL, COMP1_SR (AV1, COMP1)
7
Caution Make sure to disconnect the power before working on the IP board.
sound cable (Comp/PC/DVI to HDMI) ?
Yes
Yes
Does the sound data appear at
TP - COMP2_SL, COMP2_SR (Comp2)
TP - SIDE_AV_SL, SIDE_AV_SR(AV2)
TP - 914, 915 (PC/DVI) ?
Yes
Does the DC B3.3V, B12V appear at
TP - B3.3V, B12V?
Yes
Does the sound data appear at
- L-, L+, R-, R+ ?
Yes
Replace speaker?
BN96-12871A
No
Check a set in the 'Stand-by mode'.
No
Input the video source properly.
Check CN701, CN704, CN902.
Change the Main Assy.
No
C450: BN94-03377Z
C459: BN94-03377M
C539: BN94-03379B
Change the Main Assy.
C450: BN94-03377Z
No
C459: BN94-03377M
C539: BN94-03379B
Check IC201 (Saturn4). Check IC904
(Sound AMP). Change the Main Assy.
No
C450: BN94-03377Z
C459: BN94-03377M
C539: BN94-03379B
No Please, Contact Tech support.
4. Troubleshooting
4-23