No Sound - Samsung LN32A550P3F Service Manual

4-1-10. No Sound

Symptom Video is normal but there is no sound..
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When the speaker connectors are disconnected or damaged.
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Major
When the sound processing part of the Main Board is not functioning.
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checkpoints
Speaker defect..
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Diagnostics
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Caution Make sure to disconnect the power before working on the IP board.
Picture is display, no sound.
Yes
Check component source and
check the connection of
component cable?
Yes
Does the signal appear at
C762~C771 of IC400?
Yes
Does the digital data appear at
#27~#30 (Mclk, Sclk, LRclk, data)
of IC1203?
Yes
Does the signal appear at
L1201, L1202 (L/R output)?
Yes
Check the LVDS cable?
Replace the LCD panel?
Input a component signal.
No
Check the connected cable.
Check IC400 or Side-AV.
No
Change the main PCB ass'y or
side-AV assembly
Check IC1203
No
Change the main PCB assembly
Check IC1203
No
Change the main PCB assembly
No
Please, Contact 1 800 Samsung
4. Troubleshooting
4-25