4-2-7. No Sound (1.Speaker 2.Monitor_out 3.Optical)
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
1
Check the signal at input of Main Board.
AV, COMP L/R : R520 -
No
Check CN502.
Change the Main Ass'y.
Yes
2
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
No
Check IC500.
Change the Main Ass'y.
Yes
3
4
Check the Speaker sound data at 1.
CN400.
Check the Monitor out sound data at 2.
CN2101_IBR.
Does the SODIF OUT sound data 3.
appear at OP400.
No
Check IC500.
Change the Main Ass'y.
Yes
Replace speaker ?
Yes Please, Contact Tech support.
Caution
Make sure to disconnect the power before working on the IP Board.
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