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4-1-4. No Video (Tuner_CVBS)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Check the Tuner CVBS source
-
Major
Check the IC6001(SDP84)
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Diagnostics
1
2
3
Caution
Make sure to disconnect the power before working on the IP board.
3
Power Indicator is off.
Lamp on, no picure.
Yes
Does the signal appear at R5035?
Yes
[4] Does the signal appear at
pin 9 of TU5001?
Yes
Does the digital data appear at the
output of LVDS (TP7025~TP7038 ,
TP7040~TP7053)?
Yes
Check the LVDS cable?
Replace the LCD panel?
2
1
No
No
No
No
No
4. Troubleshooting
Connect the RF cable and
check RF signal.
Check a B+ voltage (#3 of Tuner) 5V,
change a main PCB ass'y.
Check a Tuner(TU5001)
Change a main PCB ass'y.
Check a IC7001
Change a main PCB ass'y
Please, Contact Tech support.
4-7
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