Troubleshooting Guide - LG Flatron F720B Service Manual

NO POWER
(POWER INDICATOR OFF)
CHECK
FUSE OK?
YES
CHECK
C908 VOLTAGE?
(AC120V: 160VDC,
AC220V: 304VDC)
YES
CHECK
IC901 PIN 6
WAVEFORM
?
2.5V
0V
YES
CHECK
D941, D942,
D951, D961, D971
VOLTAGE?
YES
TROUBLE IN
Q903, Q952,
Q951, Q942, Q941

TROUBLESHOOTING GUIDE

1. NO POWER
NO
NO
NO
NO
- 13 -
TROUBLE IN FUSE
(F901)
TROUBLE IN
D900
TROUBLE IN
Q901
TROUBLE IN
D941, D942, D951,
D961, D971