No Sound (1.Speaker 2.Monitor_Out 3.Optical)_Nt14U - Samsung UN40HU6950F Service Manual

4. Troubleshooting

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.
• When the speaker connectors are disconnected or damaged.
Major
• When the sound processing part of the Main Board is not functioning.
checkpoints
• Speaker defect.
1
Diagnostics
1. Check the Speaker sound data at ?
2. Check the Monitor out sound data at ?
2
3. Does the SODIF OUT sound data
Caution Make sure to disconnect the power before working on the IP Board.
4-22
Check the source and check the
connection of sound cable ?
COMP
Yes
Check the signal at input of Main board?
AV, COMP L/R : R520
Yes
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
Yes
CN400
-
CN2101_IBR
-
appear at ?
OP400
-
Yes
Replace speaker ?
No Input the sound source properly.
Check CN502.
No
Change the Main Ass'y.
Check IC500.
No
Change the Main Ass'y.
Check IC500.
No
Change the Main Ass'y.
No Please, Contact Tech support.