Samsung UN19C4000PD, 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 BD213V, TP- B13VS?
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.
26" : BN94-03399B
22"/19" : BN94-03399C
Check CN701, CN902, CN1201.
Change the Main Assy.
26" : BN94-03399B
22"/19" : BN94-03399C
Check IC301 (SX1)
Check IC1202 (Sound AMP).
Change the Main Assy.
26" : BN94-03399B
22"/19" : BN94-03399C
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.