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4. Troubleshooting
4-2-5. No Sound (Speaker)
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.
Diagnostics
1
2
Caution
Make sure to disconnect the power before working on the IP Board.
4-14
Check the source and check the
connection of sound cable ?
Yes
Check the signal at input of Main Board?
HDMI
Yes
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
-
Yes
Check the Speaker sound data at ?
CN402
Yes
Replace speaker ?
No
Input the sound source properly.
Check CN501, CN502.
No
Change the Main Ass'y.
Check IC402.
No
Change the Main Ass'y.
No
Change the Main Ass'y.
No
Please, Contact Tech support.
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