Operating instructions

15" LCD Color Monitor AOC 519Sw
31
9.2.2 Power Board
Check to CN902 pin12 = 12V
Check Interface board
OK
Check AC line volt 120V or 220V
NG
Change F901; check BD901, C903, and IC901
Check the voltage of C907(+)
Check R914, C906, IC901
Check start voltage for the pin3 of IC901
NG
Check the auxiliary voltage is smaller than 20V
1) Check IC902, IC903, T901,ZD902
2) Check Q901, D900…OVP circuit
OK
OK
OK
NG
NG
Check C915, C921, IC902, IC903
NG