Samsung HG40ED590BB - No Sound (Speaker)

4-2-5. No Sound (Speaker)
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 ?
No
Input the sound source properly.
Yes
Check the signal at input of Main Board?
HDMI
No
Check CN501, CN502.
Change the Main Ass’y.
Yes
1
Check the DATA between the Audio IC’s ?
Pin #45 of IC402 : B clk -
Pin #4 of IC402 : LR clk -
Pin #6, #7 of IC402 : I2C_SDA/SCL -
No
Check IC402.
Change the Main Ass’y.
Yes
2
Check the Speaker sound data at ?
CN402
No
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.
4-14
4. Troubleshooting