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

6. CVBS VIDEO OUTPUT TROUBLESHOOTING

When Video select
No display
Video
No
Cable connection
OK
Yes
No
Video Part ñ1
Check OK
Yes
No
R788,R789,R790
soldering
OK
Yes
No
IC157(5,10,12-pin)
Video signal input
OK
Yes
No
C562,C563
C564,R565 soldering
OK
Yes
No
F107,F387
F109,F108 soldering
OK
Yes
CVBS
Video Output OK
Cable connect
System part check
No
L127,L128
L129 soldering
OK
Yes
No
Q102,Q103
Q104 soldering
OK
Yes
No
R248,R245
R247soldering
OK
Yes
No
IC157(1,2,3-pin)
Low=î0î
OK
Yes
Re-soldering
Re-soldering
J114 Connector
Re-soldering
Re-soldering
Re-soldering
No
IC157(4-pin)
+9.0 V
OK
Yes
Soldering check
Or Change
3-35
Power Cable
Check
L125
No
soldering
OK
IC157