LG Flatron W1943TB - Page 22


- 22 -
5. POWER
Check U901 pin 6
Vcc is 13v?
Check D902,C911
Check U901, T901,D906,D905,ZD903,ZD902,U902,U903
NO
YES
YES
No Power
(Power Indicator Off)
Check AC line
volt
Check the
voltage of C907(+)
Check start
voltage for the pin1
of U901
Check AC line
Check F901, BD901
Check D901, R903,
R904,R905,U901
NO
YES
NO
YES
NO
Check U901 PIN5
output is PWM?
Check D904,Q901
NO
http://www.wjel.net