No Sound - Samsung LN32A650A1F Service Manual

4-1-9. 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
0
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Caution Make sure to disconnect the power before working on the IP board.
Lamp(Backlight) Off, no sound.
Yes
Check the sound source and
check the connection of
sound cable?
Yes
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 digital data appear at
R1547, R1548, R1549, R1550
(Mclk, Sclk, LRclk, data)?
Yes
Does the signal appear at
L1501, L1502 (L/R output)?
Yes
Check the LVDS cable?
Replace the speaker?
Input a sound signal.
No
Check the connected cable.
Check CN201 or Side-AV.
No
Change the main PCB ass'y or
side-AV assembly
Check IC1502
No
Change the main PCB assembly
Check IC1501
No
Change the main PCB assembly
No
Please, Contact Tech support
4. Troubleshooting
4-17