4-25
4. Troubleshooting
4-1-10. 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..
-
-
-
Diagnostics
Check IC400 or Side-AV.
Change the main PCB ass’y or
side-AV assembly
No
Yes
Picture is display, no sound.
Yes
Check component source and
check the connection of
component cable?
No
Input a component signal.
Check the connected cable.
Yes
Check the LVDS cable?
Replace the LCD panel?
Please, Contact 1 800 Samsung
No
Does the digital data appear at
#27~#30 (Mclk, Sclk, LRclk, data)
of IC1203?
No
Check IC1203
Change the main PCB assembly
@
Does the signal appear at
C762~C771 of IC400?
Yes
Does the signal appear at
L1201, L1202 (L/R output)?
No
Check IC1203
Change the main PCB assembly
#
Yes
!
Caution Make sure to disconnect the power before working on the IP board.
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