4-7
4. Troubleshooting
4-1-4. No Video (Tuner_CVBS)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the Tuner CVBS 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 B+ voltage (#7of Tuner) 5V,
change a main PCB ass’y.
No
No
Power Indicator is off.
Lamp on, no picure.
Yes
Change a main PCB ass’y.
Does the signal appeat #8 of TU4001?
Does the Signal appear at C6025
of IC6003?
Check the LVDS cable?
Replace the LCD panel?
Please, Call to Samsung Co. LTD.
Yes
Connect the RF cable and
check RF signal.
Yes
Yes
Caution
Make sure to disconnect the power before working on the IP board.
www.freeservicemanuals.info
12/9/2016
Published in Heiloo, Holland
Содержание LA22B480Q1
Страница 89: ...1 4 1 Precautions Memo www freeservicemanuals info 12 9 2016 Published in Heiloo Holland ...
Страница 100: ...4 4 4 Troubleshooting WAVEFORMS 1 R G B Output Signal www freeservicemanuals info 12 9 2016 Published in Heiloo Holland ...
Страница 106: ...4 10 4 Troubleshooting WAVEFORMS 4 CVBS Output Signal www freeservicemanuals info 12 9 2016 Published in Heiloo Holland ...
Страница 126: ...6 3 6 Wiring Diagram www freeservicemanuals info 12 9 2016 Published in Heiloo Holland ...
Страница 127: ...6 4 6 Wiring Diagram www freeservicemanuals info 12 9 2016 Published in Heiloo Holland ...