4-13
4. Troubleshooting
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, Check the Main Chipset.
-
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Diagnostics
Does the DC B5V_TU_PW, B33V_TU_PW
appear at #3, #5 Pin of Tuner ?
Check the 'signal strength' in Self Diagnosis
menu Strength is enough ?
Does the digital data appear at
TP-, E_TXCLK- ,
, O_TXCLK- ?
Yes
Yes
Yes
Yes
Yes
Check a set in the 'Stand-by mode'
Input the RF source properly.
Please, Contact Tech support.
Change the Main Assy.
Check the D-TV source.
Check IC1001 (X6).
Change the Main Assy.
No
No
No
No
No
No
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Check the RF source and
check the connection of RF cable ?
Check the LVDS cable?
Check the T-Con B'd?
Replace the LCD panel?
2
Caution
Make sure to disconnect the power before working on the IP board.
www.freeservicemanuals.info
4/30/2017
Digitized in Heiloo Netherland