4-11
4. Troubleshooting
4-1-6. No Sound
Symptom
Picture is normal But no Sound
-
Major
checkpoints
Check the RF Source
Check the IC6001(SDP84)
This may be happened when LVDS Cable is Connected between Panel and Main Board ,
But Sound cable is disconnected.
-
-
-
Diagnostics
1
2
3
No
Check a connection harness and
headphone jack./Side AV
Check Sound Processor
IC2001
No
Picture is display, no sound.
Check a B12VS, B9V Line.
Change a main PCB ass’y.
No
Does the signal appear at pin
#1 ~#9 , #33~#44 , #61~#64
around IC2001?
Check the DC 12V and 9V
at BD2012 and C2002?
Please, Contact Tech support.
No
Does the signal appear at
Pin6 , Pin9 , Pin10 ,
Pin13 of 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.
Summary of Contents for LE37B55 series
Page 7: ...1 4 1 Precautions Memo...
Page 39: ...4 4 4 Troubleshooting WAVEFORMS 1 R G B H_sync input signal of IC6001 SDP84...
Page 41: ...4 6 4 Troubleshooting WAVEFORMS 2 Digital Output Data 3 Signal of HDMI Data...
Page 43: ...4 8 4 Troubleshooting WAVEFORMS 3 CVBS Output Signal 4 Tuner_CVBS Output Signal...
Page 45: ...4 10 4 Troubleshooting WAVEFORMS 4 CVBS Output Signal at C6852 C6853 C6854...
Page 475: ...5 410 5 Exploded View Part List...
