Samsung UN FH6200F Series, Service Manual, Page: 37 / 74

4-2-4. No Video (Tuner_DTV)
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 ?
Check the DTV source.
Yes
2
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
2
Check the LVDS signal at output of Main
Board ?
TX2_CLK : LV_TX2_DN/DP
TX4_CLK : LV_TX4_DN/DP
No
Check IC1001(X10+).
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.
4-13
4. Troubleshooting