Samsung LA22B480Q1 Service Manual page 107

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4-1-6. No Sound
Symptom
Major
checkpoints
Diagnostics
Caution
Audio is normal but no picture is displayed on the screen.
-
Check the RF Source
-
Check the M-star
-
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
LA22B480Q1
Picture is display, no sound.
Yes
Does the signal appear at R2008,
1 R2009,R2010(AUSD,AUWS,AUSCK)
of IC2002?
Yes
Check the DC 13V
2
id IC2002?
Yes
Does the signal appear at
3
L2001,L2002 near IC2002?
Yes
Replace the speaker ass'y?
Make sure to disconnect the power before working on the IP board.
Published in Heiloo, Holland
LA26B480Q1, LA32B480Q1
Connect a sound cable.
No
control a volume.
Check a connection harness and
No
headphone jack./Side AV
Check Sound Processor
IC6003(M-star)
Check a B12V Line.
No
Change a main PCB ass'y
No
Change a main PCB ass'y.
12/9/2016
4. Troubleshooting
4-11