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 SEMS01
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
No
Check a B+ voltage (#3 of 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 appear at L3001?
Does the signal appear at R3169?
No
Please, Call to Samsung Co. LTD.
Check the LVDS cable?
Replace the LCD panel?
Yes
Connect the RF cable and
check RF signal.
Yes
1
2
Caution Make sure to disconnect the power before working on the SMPS/IP.
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