4-1-8. 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/PC/DVI to HDMI) ?
Yes
Yes
No
Input the sound source properly.
Replace speaker ?
No
Please, Contact Tech support.
Check CN402, CN501, CN502.
Change the Main Assy.
Check IC1101, IC302.
Change the Main Assy.
Check IC1101, IC301, IC302 .
Change the Main Assy.
No
No
No
Check the signal at input of Main board ?
SIED AV R : C331 / L : C332
AV1, COMP1 R : C339 / L : C340
PC, DVI R : C333 / L : C334
SC1 R : C335 / L : C336
SC2 R : C337 / L : C338
Check the I2C DATA between the Audio IC’s ?
Pin #6 of IC302 : VAL_MCLK
Pin #7 of IC302 : VAL_LRCLK
Pin #10 of IC302 : PCM_I2C_DATA
1. Check the Speaker sound data at ?
BD304, BD303 (R +/-)
BD306, BD305 (L +/-)
2. Check the Monitor out sound data at ?
L507 ( R )
L506 ( L )
3. Does the SODIF OUT sound data appear at ?
TP302 (SPDIF_OUT)
0
!
Yes
Yes
Yes
Change the Main Assy.
No
Check the Power of Audio codec IC ?
BD302 : B3.3V
BD301 : B9V
Caution Make sure to disconnect the power before working on the IP board.
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