No Sound - Samsung LN26C350D1D Service Manual

4. Troubleshooting

4-1-8. 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
6
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
COMP_SR/COMP_SL
TP830,831(PC,DVI sound R/L)?
Yes
Does the DC B3.3V, B12V
appear at TP - B3.3V, B12V?
Yes
Does the I2C data appear at R1004?
Yes
Does the sound data appear at
Speaker - L-, L+, R-, R+?
Yes
Replace speaker ?
LC350_26",32" : BN96-13058A
No
Insert the sound source properly.
Check CN706,CN805.
Change the Main Assy.
No
LC350_26": BN44-00368A
LC350_32" : BN41-00369A
Change the Main Assy.
No
LC350_26": BN44-00368A
LC350_32" : BN41-00369A
Check IC903 (Audio CODEC).
Change the Main Assy
No
LC350_26": BN44-00368A
LC350_32" : BN41-00369A
Check IC201 (Saturn4).
Check IC903 (Sound AMP).
No
Change the Main Assy
LC350_26": BN44-00368A
LC350_32" : BN41-00369A
No
Please, Contact Tech support.