Samsung UD6400, Training Manual

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Trouble Shooting – No Video (Tuner CVBS)
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
Check the Power of Tuner ?
Pin #4 of Tuner : B3.3V_Tuner
Pin #2 of Tuner : B1.8V_Tuner
NO
Change the Main Ass'y.
YES
Check the CVBS data out of IC901 ?
C941 : Tuner CVBS
NO
Check Tuner and IC801(Arsenal).
Change the Main Ass'y.
YES
Check the LVDS clk signal at output of
Main board.(TX)
TX2_CLK : LV_TX2_DN/DP
TX4_CLK : LV_TX4_DN/DP
NO
Check IC1001(GenoaS) and
IC2001(Parma).
Change the Main Ass'y.
YES
Check the LVDS cable?
Replace the T-con / LCD panel?
NO
Please, Contact Tech support.