4-17
4. Troubleshooting
4-1-9. No Sound
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..
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-
-
Diagnostics
Check CN201 or Side-AV.
Change the main PCB ass’y or
side-AV assembly
No
Yes
Lamp(Backlight) Off, no sound.
Yes
Check the sound source and
check the connection of
sound cable?
No
Input a sound signal.
Check the connected cable.
Yes
Check the LVDS cable?
Replace the speaker?
Please, Contact Tech support
No
Does the digital data appear at
R1547, R1548, R1549, R1550
(Mclk, Sclk, LRclk, data)?
No
Check IC1502
Change the main PCB assembly
!
Does the signal appear at C1565,
C1566 (S-Video R/L)
C1567, C1568 (Comp1 R/L)
C1569, C1570 (Comp2 R/L)
C1571, C1572 (DVI R/L)
C1573, C1574 (PC R/L)?
Yes
Does the signal appear at
L1501, L1502 (L/R output)?
No
Check IC1501
Change the main PCB assembly
@
Yes
0
Caution Make sure to disconnect the power before working on the IP board.
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