Samsung LN-4692D Service Manual page 30

4 Troubleshooting
4-4 No Picture (Tuner_CVBS)
Power Indicator is off.
Lamp on, no picture.
Yes
Check a RF source and
check the connection of RF
cable ?
Yes
Does the signal appear at
the main splitter cable ?
Yes
Does the signal appear at
8
C912 ?
Yes
Does the digital data
appear at output of
9
R1034-7, R1039 ?
Yes
Does the digital data
appear at output of R1010-
10
5, R1024-7 ?
Yes
Check a LVDS cable ?
Replace a LCD panel ?
4-6
No
Input a RF signal.
Check a connected cable.
Check CN501.
No
Check splitter cable connection.
Change a main PCB ass'y or splitter
No
Check TU501.
Change a main PCB ass'y or tuner.
No
Check IC901
Change a main PCB ass'y
No
Check IC1002
Change a main PCB ass'y
No
Please, Call to Samsung Co. LTD.
cable.