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4. Troubleshooting
4-1-5. No Video (Tuner_CVBS)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Check the Tuner CVBS source.
-
Major
Check the Tuner, Check the Chelsea.
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Diagnostics
4
2
Caution
Make sure to disconnect the power before working on the IP board.
4-10
Is power inductor LED off?
Lamp(Backlight) on and no video?
Yes
Check the RF source
and the connection.
Yes
Does the CVBS data appear at R836?
Yes
Does the DC B5V_PW, TU33V_PW
appear at pin #3, 5 of tuner?
Yes
Does the digital data appear at
ODD_TXCLK+(D3+),
ODD_TXCLK-(D3-)?
Yes
Check the LVDS cable?
Check the T-Con B'd?
Replace the LCD panel?
No
in the 'Stand-by mode'.
No
Input the RF source properly.
No
Change the Main Assy
No
Change the Main Assy
Check IC1102(SETD-10).
No
Change the main Assy.
No
Please, Contact Tech support
Check a set
Check Tuner
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