No Video (Tuner_Cvbs) - Samsung LE32B53 SERIES Service Manual

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.
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Major
Check the Tuner, Check the Chelsea.
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
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Diagnostics
4
2
Caution Make sure to disconnect the power before working on the IP board.
4-10
Power indicator LED is off.
Lamp(Backlight) on, no video?
Yes
Check the RF source and
check the connection of RF cable?
Yes
Does the DC TU5V_PW, TU33V_PW
appear at #3, #5 Pin of Tuner?
Yes
Does the CVBS data appear at
#9 pin of Tuner?
Yes
Does the digital data appear at
Pin #19,20,34,35 (LVDS Data clk)
of LVDS connector?
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
No
Check IC4010 (Saturn4)
Change the Main Assy
No
Please, Contact Tech support
Check a set
Check Tuner