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.•
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
Check the signal at input of Main board?
AV, COMP L/R : R520
No
Check CN502.
Change the Main Ass’y.
Yes
1
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
No
Check IC500.
Change the Main Ass’y.
Yes
2
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 -
No
Check IC500.
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.
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