Samsung LA32C550J1R, Руководство по обслуживанию

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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
2
1
1
2
No
Check a B+ voltage (IC801 DRXK IC)
3.3V,1.25V.
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 #43 of IC801?
(DRXK 43PIN CVBS_TP)
Does the Signal appear at
R505 of IC1102?
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.