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
LA22B350F2
LA22B450C8
No
Check a connection harness and
headphone jack/side AV.
Check Sound Processor
IC6003(M-star)
No
Picture is display, no sound.
Check a B13V Line.
Change a main PCB ass’y
No
Does the signal appear at R2109,
R2107,R2108(AUSD,AUWS,AUSCK)
of IC2100?
Check the DC 13V
appear at C2112 of IC2100?
Replace the speaker ass’y?
Yes
Connect a sound cable.
control a volume.
Yes
1
Yes
2
Caution
Make sure to disconnect the power before working on the IP board.
Содержание LA22B350F2
Страница 20: ...1 4 1 Precautions Memo ...
Страница 30: ...4 4 4 Troubleshooting WAVEFORMS 1 R G B Output Signal ...
Страница 32: ...4 6 4 Troubleshooting WAVEFORMS 2 Digital Output Data 3 Signal of HDMI Data ...
Страница 34: ...4 8 4 Troubleshooting WAVEFORMS 3 CVBS Output Signal 4 Tuner_CVBS Output Signal ...
Страница 36: ...4 10 4 Troubleshooting WAVEFORMS 4 CVBS Output Signal ...
Страница 38: ...4 12 4 Troubleshooting WAVEFORMS 6 The Signal are Inputed to IC1201 7 The Signal are Inputed to IC1202 ...
Страница 55: ...6 3 6 Wiring Diagram 6 2 Wiring Picture LA22B350F2 LA22B450C8 ...