4-11
4. Troubleshooting
4-1-6. No Sound
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the RF Source
Check the M-star
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
LA22B480Q1
LA26B480Q1, LA32B480Q1
No
Check a connection harness and
headphone jack./Side AV
Check Sound Processor
IC6003(M-star)
No
Picture is display, no sound.
Check a B12V Line.
Change a main PCB ass’y
No
Does the signal appear at R2008,
R2009,R2010(AUSD,AUWS,AUSCK)
of IC2002?
Check the DC 13V
id IC2002?
Change a main PCB ass’y.
No
Does the signal appear at
L2001,L2002 near IC2002?
Replace the speaker ass’y?
Yes
Connect a sound cable.
control a volume.
Yes
1
Yes
3
Yes
2
Caution
Make sure to disconnect the power before working on the IP board.
www.freeservicemanuals.info
12/9/2016
Published in Heiloo, Holland
Summary of Contents for LA22B480Q1
Page 89: ...1 4 1 Precautions Memo www freeservicemanuals info 12 9 2016 Published in Heiloo Holland ...
Page 126: ...6 3 6 Wiring Diagram www freeservicemanuals info 12 9 2016 Published in Heiloo Holland ...
Page 127: ...6 4 6 Wiring Diagram www freeservicemanuals info 12 9 2016 Published in Heiloo Holland ...