No Picture - Analog & Component Mode - Daewoo LA37L1B1LM Service Manual

Hardware Trouble shooting
2) No Picture - Analog & Component mode
- In case of ATV, VIDEO, COMPONENT mode
START
Yes
Check
The input power of
IC401 is correct
Yes
Check the LVDS signal
output of IC401 is correct
No
Is the input signal IC401
nomal?
No
1) TV mode: Check the path
TU101(CE102) -> IC202(CC214, RC230) -> IC401(RC226, RC229, QC202, CC218, RC233, CC220, CC221)
2) Component mode: Check the path
Comp1: JK208(LC208-210) -> IC204(CC241, CC243, CC245) -> IC204(RC251, RC252, RC253)
-> IC204(RC247 ~ 249) -> IC401(RC237 ~ 239)
Comp2: JK208(LC213-215) -> IC204(CC242, CC244, CC246) -> IC204(RC251, RC252, RC253)
-> IC204(RC247 ~ 249) -> IC401(RC237 ~ 239)
3) Composite & S-Video
Composite1: JK201(LC201, CC201, RC201, CC202) -> IC202(CC210) -> IC401(RC226, RC229, QC202,
CC218, RC233, CC220, CC221)
Composite2: P201(LC204, CC207, CC208, RC205) -> IC202(CC212) -> IC401(RC226, RC229, QC202,
CC218, RC233, CC220, CC221)
S-Video: JK202(LC203, CC205, LC202, CC203, CC206, RC204, CC204, RC203) -> IC202(CC211, CE201,
RC216) -> IC401(RC226, RC229, QC202, CC218, RC233, CC220, CC221)
No
Check the SMPS and input voltage
Yes
Check the LVDS signal
output of IC401 is correct
IC401 problem.
Replace the Main PCB
Yes
IC401 problem.
Replace the Main PCB
-14-
No
Yes
Perhaps Connector and
Cable problem.
Replace connector or cable.