Samsung UN46C7000WF - 4-1-4. No Video (Tuner

To Next Page

To Previous Page

4-19

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 Valencia

Check if the LVDS cable is loose or not. -

Diagnostics

Change the TU701 or

the main PCB assembly.

Yes

No video

Yes

Check the RF source and

check the connection of RF cable?

Input the RF signal.

Check the connected cable.

Yes

Does the signal appear at

pin11, 12 of TU701?

Yes

Check the LVDS cable?

Replace the LCD panel?

Please, contact Tech support.

Does the digital data appear at

pin 15~81 of CN2101?

Change the IC1001 or

the main PCB assembly.

Caution Make sure to disconnect the power before working on the PD board.

Notice Refer to the next page for detailed locations.

Samsung UN46C7000WF - 4-1-4. No Video (Tuner_CVBS)