AOS 210S, Service Manual

Page: 34 / 54

22" LCD Color Monitor AOC 210S
34
2.) W / LED, No Backlight
Check CN903 pin2 = 12V
NG
OK
Check adapter or MB
Check ON/OFF signal
Check Interface board
NG
OK
Check IC801 pin5=5V
NG
OK
Change Q801 or Q802
NG
OK
Check C826, R820 and IC801
NG
OK
Check Q803, Q806
Check the input wave of pin2 & pin5 for T801, T803, T804 and T805
NG
Check the output of T801, T803, T804 and T805
Check C807, C817, C836, C840
Check connecter & lamp
OK
NG
Check T801, T803, T804 and T805
OK
Check D820, D821, D826 and D827 have the output of
square wave at short time.
Check IC801 PIN18, 17 have the output of square wave at short