No Sound - Samsung UN32D5500RF Service Manual

4. Troubleshooting

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..
-
Main Ass'y
Speaker
Check the source and check the connection of
Dose the promblem still exist self diagnosis ?
Diagnostics

Caution Make sure to disconnect the power before working on the IP board.
4-22
14p cable
LVDS cable
T-con
sound cable (Comp/PC/DVI to HDMI) ?
Yes
check the Self Diagnosis
(SupportSelf DiagnosisPicture Test)
Yes
Does the sound data appear at
R524/R525 (AV1, COMP1)
R419/R420 (PC/DVI) ?
Yes
Does the DC B13V
appear at BD209 ?
Yes
Does the sound data appear at
- L-, L+, R-, R+ ?
Yes
Replace speaker ?
Power Ass'y
1 B5V
3 B5V
5 GND
7 B12VS
9 B12VS
11 B13V
13 B13V
No
No
No
No
No
No
Main Assy Power Assy
2 SW_PW 1 B5V
4 A5V 3 B5V
6 GND 5 GND
8 GND 7 B12VS
10 SW_INV 9 B12VS
12 NC 11 B13V
14 DMM 13 B13V
Input the sound source properly.
Check external devices and
connections.
Check CN504,CN402
Change the Main Assy.
Change the Main Assy.
Check IC1001 (X5)
Check IC301 (Sound AMP)
Change the Main Assy.
Please, Contact Tech support.
2 SW_PW
4 A5V
6 GND
8 GND
10 SW_INV
12 NC
14 DMM