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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..
-
7
Diagnostics
Caution
Make sure to disconnect the power before working on the IP board.
Check the source and
check the connection of sound cable
(Comp/PC/DVI to HDMI) ?
Yes
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)?
Yes
Does proper Main DC B13C, B3.3V appear at
TP-B13VS1, BD216?
Yes
Does the sound data appear at TP-1401, 1402,
1403, 1404 (L-, L+, R-, R+)?
Yes
Replace speaker ?
No
Input the sound source properly.
Check CN702, CN1101, CN1310.
No
Change the Main Assy.
No
Change the Main Assy.
Check IC1102 (SX1)
No
Check IC1401 (Sound AMP).
Change the Main Assy.
No
Please, Contact Tech support.
4. Troubleshooting
4-19
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