Ypbpr Video Output Troubleshooting - LG LST-3410A Service Manual

4. YPbPr VIDEO OUTPUT TROUBLESHOOTING

When YPbPr select
No display
No
YPbPr
Cable connection
OK
Yes
No
Video Part ñ1
Check OK
Yes
No
IC156(5,10,12-pin)
Video signal input
OK
Yes
No
IC144(5,10,12-pin)
Video signal input
OK
Yes
No
C567,C568
C569 soldering
OK
Yes
No
F116,F117
F118 soldering
OK
Yes
YPbPr
Video Output OK
Cable connect
(RCA Jack Color matching)
System part check
R478,R480 No
R479 soldering
OK
Yes
No
Q117,Q118
Q119 soldering
OK
Yes
No
L119
soldering
OK
Yes
No
IC144(1,2,3-pin)
Low=î0î
OK
Yes
Re-soldering
Re-soldering
J114 Connector
Re-soldering
Re-soldering
Re-soldering
No
IC144(4-pin)
+9.0 V
OK
Yes
Soldering check
3-33
Power Cable
Check
L120
No
soldering
OK