No Component Video - Samsung 570DX Service Manual

4-5 No Component Video

Does 3.3V appear at
ZD109 ~ 113?
YES
Does the waceform appear at
R1011(Pr) ,R1012(Y)
11
R1013 (Pb)?
YES
Does the TX** signal appear
at Pin 14 and 15
of CN403?
YES
Check the cable between the
main board and panel and
replace the LCD panel.
NO
NO
Reconnect the component cable.
,
12
13
NO
The scaler (IC408) is abnormal.
Press the power button and
check the LED.
Replace the main board.
4 Troubleshooting
4-9