Samsung UE32D55-R Series Service Manual page 82

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No Video (Tuner_CVBS)
„
Symptom
Major
checkpoints
Diagnostics
Caution
Audio is normal but no picture is displayed on the screen.
-
Check the Tuner CVBS source.
-
Check the Tuner, Check the Main Chipset.
-
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
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 TP - TUNER_33V, B 5V
Pin of Tuner ?
Yes
Does the DC B5V_TU_PW, B33V_TU_PW
2
appear at #3, #5 Pin of Tuner ?
Yes
Check the LVDS cable?
Check the T-Con B'd?
Replace the LCD panel?
Make sure to disconnect the power before working on the IP board.
Digitized in Heiloo Netherland
No
Check a set in the 'Stand-by mode'
No
Input the RF source properly.
No
Change the Main Assy.
Check IC1111 (X5).
No
Change the Main Assy.
No Please, Contact Tech support.
4/30/2017
4. Troubleshooting
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