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
Does proper Main DC B13C, B3.3V appear at
TP-B13VS1, BD216?
Does the sound data appear at pin COMP1_
SR, COMP1_SL(Comp R/L)
TP-921, 922 (PC/DVI R/L)
TP-HP_SR, HP_SL(Headphone out R/L)?
Does the sound data appear at TP-1401, 1402,
1403, 1404 (L-, L+, R-, R+)?
Yes
Yes
Yes
Yes
Input the sound source properly.
Please, Contact Tech support.
Change the Main Assy.
Check CN702, CN1101, CN1310.
Change the Main Assy.
Check IC1102 (SX1)
Check IC1401 (Sound AMP).
Change the Main Assy.
No
No
No
No
No
Check the source and
check the connection of sound cable
(Comp/PC/DVI to HDMI) ?
Replace speaker ?
7
Caution Make sure to disconnect the power before working on the IP board.
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