Samsung UN40HU6900F, Service Manual

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4-2-7. No Sound (1.Speaker 2.Monitor_out 3.Optical)_NT14U
Note
Refer to the next page to check the location such a CN201 or IC201 SVC Manual mentioned.
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
Check the source and check the
connection of sound cable ?
COMP
No Input the sound source properly.
Yes
Check the signal at input of Main board?
AV, COMP L/R : R520
No
Check CN502.
Change the Main Ass’y.
Yes
1
Check the DATA between the Audio IC’s ?
Pin #15 of IC500 : B clk
-
Pin #20 of IC500 : LR clk
-
Pin #23,#24 of IC500 : I2C_SDA/
-
SCL
No
Check IC500.
Change the Main Ass’y.
Yes
2
1. Check the Speaker sound data at ?
CN400
-
2. Check the Monitor out sound data at ?
CN2101_IBR
-
3. Does the SODIF OUT sound data
appear at ?
OP400
-
No
Check IC500.
Change the Main Ass’y.
Yes
Replace speaker ? No Please, Contact Tech support.
Caution Make sure to disconnect the power before working on the IP Board.
4-22
4. Troubleshooting