4-1-9. No Sound (B Type)
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 the DC B3.3V, B13V
appear at L202 (B3.3V), TP - B13V?
Does the sound data appear at
TP - COMP1_SR, COMP1_SL (Comp R/L)
TP - 912, 913 (PC/DVI R/L)
TP - MONITOR_R, MONITOR_L
(MONITOR OUT R/L) ?
Does the sound data appear at
TP - L-, L+, R-, R+ ?
Yes
Yes
Yes
Yes
Input the sound source properly.
Please, Contact Tech support.
Change the Main Assy.
Check CN701, CN902, CN1201.
Change the Main Assy.
Check IC301 (SX1).
Check IC1202 (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 ?
TBD
7
Caution Make sure to disconnect the power before working on the IP board.
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