Adelpia TGL2200A, Service Manual, Page: 36 / 53

22” LCD Color Monitor Adelpia TGL2200A
36
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 PT801, PT803, PT804 and PT805
NG
Check the output of PT801, PT803, PT804 and PT805
Check C807, C817, C836, C840
Check connecter & lamp
OK
NG
Check PT801, PT803, PT804 and PT805
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