4-1-8. 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
No
Check CN706,CN805.
Change the Main Assy.
LC350_26": BN44-00368A
LC350_32" : BN41-00369A
No
Does the DC B3.3V, B12V
appear at TP - B3.3V, B12V?
Check the source and
check the connection of sound cable
(Comp/PC/DVI to HDMI)?
Change the Main Assy.
LC350_26": BN44-00368A
LC350_32" : BN41-00369A
No
Check IC903 (Audio CODEC).
Change the Main Assy
LC350_26": BN44-00368A
LC350_32" : BN41-00369A
No
Does the I2C data appear at R1004?
Check IC201 (Saturn4).
Check IC903 (Sound AMP).
Change the Main Assy
LC350_26": BN44-00368A
LC350_32" : BN41-00369A
No
Does the sound data appear at
Speaker - L-, L+, R-, R+?
No
Please, Contact Tech support.
Replace speaker ?
LC350_26",32" : BN96-13058A
Does the sound data appear at
COMP_SR/COMP_SL
TP830,831(PC,DVI sound R/L)?
Yes
Yes
Yes
Yes
Insert the sound source properly.
Yes
6
7
Caution Make sure to disconnect the power before working on the IP board.
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