No Video (Tuner DTV)
*Refer to the next page to check the lacation such a CN201 or IC201 SVC Manual mentioned.
Symptom
Audio is normal but no picture is displayed on the screen.•
Major
checkpoints
Check the DTV source.•
Check the Tuner.•
This may happen when the LVDS cable connecting the Main Board and the Panel is •
disconnected.
Diagnostics
Power indicator LED is off.
Lamp(Backlight) on, no video ?
No
Check a set in the ‘Stand-by mode’.
Yes
Check the RF source and
check the connection of RF cable ?
No
Input the RF source properly.
Yes
1
Check the ‘signal strength’ in Self
Diagnosis menu Strength is enough ?
No
Check the D-TV source.
Yes
2
Check the Power of Tuner ?
Pin #4 of Tuner : B3.3V_Tuner
Pin #1 of Tuner : B1.8V_Tuner
No
Change the Main Ass’y.
Yes
2
Check the LVDS clk signal at output of
Main board.(TX)
TX2_CLK : ODD_TXCLK_DN/DP
TX4_CLK : EVEN_TXCLK_DN/DP
No
Check IC1001(X12)
Change the Main Ass’y.
Yes
Check the LVDS cable?
Replace the T-con / LCD panel?
No
Please, Contact Tech support.
Caution Make sure to disconnect the power before working on the IP board.
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