Samsung UE19C4000PW, Service Manual

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4-22
4. Troubleshooting
4-1-9. 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 the DC B3.3V, B12VS
appear at BD202, TP- B13VS?
Does the sound data appear at
TP-AV_SR_IN, AV_SL_IN (COMPOENT R/L)
TP-PC_SR_IN, PC_SL_IN (PC R/L)
TP-SC_SR_IN, SC_SL_IN (SCART 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 CN801, CN901, JA701.
Change the Main Assy.
Check IC1102 (SX1).
Check IC1302 (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.