Samsung UE D7000L Series, Service Manual

Page: 53 / 100

4-18
4. Troubleshooting
No Video (Video CVBS 1, 2)
„
Valencia
N
Refer to the next page to check the location such a CN201 or IC201 SVC Manual mentioned.
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the Video CVBS source.
-
Check the Tuner, Check the Valencia.
-
This may happen when the LVDS cable connecting the Main Board and the Panel is
-
disconnected.
Caution Make sure to disconnect the power before working on the PD board.
Diagnostics
Input the video source properly
Change the IC1202 or
the main PCB assembly.
Please, contact Tech support.
Change the CN506_UBA or
the main PCB assy.
No
No
No
No
Yes
Yes
Yes
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Check a set in the ‘Stand-by mode’.
No
Yes
Check the video source and
check the connection of video cable?
Does the digital data appear at
pin 14~42 of CN1601?
Check the LVDS cable?
Check the T-con board?
Replace the LCD panel?
Does the signal appear at R528?
2
1
Caution Make sure to disconnect the power before working on the IP board.