Samsung LE19C45 Series, Service Manual

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4-13
4. Troubleshooting
4-1-6. 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 Chelsea.
-
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Diagnostics
Check the D-TV source.
No
Yes
Does the DC B5V_TU_PW, TU33V_PW
appear at pin #3, #5 of tuner?
No
Yes
Power indicator LED is off.
Lamp(Backlight) on, no video
Yes
Check the connection of RF cable
No
Input the RF cable properly.
Yes
Change the Main Assy
Yes
Check the LVDS cable?
Check the T-Con B’d?
Replace the LCD panel?
Please, Contact Tech support
No
Check the ‘signal strength’
in Self Diagnosis menu
Strength is enough?
Does the digital data appear at
OD(D3+),
ODD_TXCLK-(D3-)?
No
Check IC1102(SETD-10).
Change the main Assy.
2
No Check a set
in the ‘Stand-by mode’.
Caution Make sure to disconnect the power before working on the IP board.