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4-2-4. No Video (Tuner_DTV)
Symptom
Audio is normal but no picture is displayed on the screen.
•
Check the DTV source.
Major
•
Check the Tuner.
checkpoints
•
This may happen when the LVDS cable connecting the Main Board and the Panel is
disconnected.
1
Diagnostics
2
2
Caution
Make sure to disconnect the power before working on the IP board.
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Yes
Check the RF source and check the
connection of RF cable ?
Yes
Check the 'signal strength' in Self
Diagnosis menu Strength is enough ?
Yes
Check the Power of Tuner ?
Pin #4 of Tuner : B3.3V_Tuner
Pin #2 of Tuner : B1.8V_Tuner
Yes
Check the LVDS signal at output of Main
Board ?
TX2_CLK : LV_TX2_DN/DP
TX4_CLK : LV_TX4_DN/DP
Yes
Check the LVDS cable?
Replace the T-CON, LCD panel?
No
Check a set in the 'Stand-by mode'.
No
Input the RF source properly.
Check the DTV source.
No
Change the Main Ass'y.
Check IC1001(X10+).
No
Change the Main Ass'y.
No
Please, Contact Tech support.
4. Troubleshooting
4-13
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