LG EV700 - Troubleshooting Guide; No Power or No Character Issues

TROUBLESHOOTING GUIDE
- 16 -
NO POWER
(POWER INDICATOR OFF)
TROUBLE IN
D901, D902, D903, D904
TROUBLE IN FUSE
(F901)
TROUBLE IN
IC901, IC902
TROUBLE IN
D920, D922, D923,
D924, D926
TROUBLE IN
IC923, IC925, Q922,
Q923, Q924, Q926
CHECK
FUSE OK?
CHECK
C907 VOLTAGE?
(AC120V: 170VDC,
AC220V: 310VDC)
NO
YES
YES
YES
YES
NO
NO
NO
CHECK
IC901 PIN 3
WAVEFORM
(SQUARE WAVE
COMES OUT?)
CHECK
D920, D922, D924,
D923, D926
VOLTAGE?
1. NO POWER