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 Tuner, Check the Valencia. -
Refer to the next page to check the lacation such a CN201 or IC201 SVC Manual mentioned. -
Diagnostics
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Check the LVDS cable?
Replace the T-con / LCD panel?
Yes
Yes
Yes
Yes
Yes
No
No
Check a set in the ‘Stand-by mode’.
Please, Contact Tech support.
Input the RF source properly.
Check the RF source and
check the connection of RF cable ?
No
Change the Main Assy.
Check Tuner and IC6001.
Change the Main Assy.
Check IC7001.
Change the Main Assy.
No
No
No
Check the Power of Tuner ?
Pin #5 of Tuner : B33V_Tuner
Pin #3 of Tuner : B5V_Tuner
Check the CVBS data out of IC6001 ?
L7515 : CVBS data
Check the LVDS clk signal at output of
Main board ? (TX1~TX4)
TX2_BP, TX2_CN, TX2_CP, TX2_CLKN
TX4_BP, TX4_CN, TX2_CP, TX2_CLKN
7
5
Caution Make sure to disconnect the power before working on the IP board.
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