No Sound (1.Speaker 2.Monitor_Out 3.Optical) - Samsung UN HU7250F Series Service Manual

4. Troubleshooting

4-2-7. No Sound (1.Speaker 2.Monitor_out 3.Optical)

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
2
Diagnostics
3
4
Make sure to disconnect the power before working on the IP Board.
Caution
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 : Bclk
-
Pin #20 of IC500 : LRclk
-
Pin #23,#24 of IC500 : I2C_SDA/
-
SCL
Yes
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.
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.
Yes Please, Contact Tech support.