Service manual

4-11

4. Troubleshooting

4-1-5. No Video (Tuner_CVBS)

Symptom Audio is normal but no picture is displayed on the screen. T

Major

checkpoints

Check the Tuner CVBS source. T

Check the Tuner, Check the Chelsea. T

This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. T

Diagnostics

Power indicator LED is off.

Lamp(Backlight) on, no video ?

Check the RF source and

check the connection of RF cable?

Check the LVDS cable?

Check the T-Con B'd?

Does the digital data appear at

TP-E_TXCLK+, E_TXCLK- ,

O_TXCLK+, O_TXCLK-?

Does the DC B5V_TU_PW, TU33V_PW

appear at #3, #5 Pin of Tuner ?

Check a set in the 'Stand-by mode'.

Input the RF source properly.

Please, Contact Tech support.

Check IC1102 (SX1).

Change the Main Assy.

Yes

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