Service manual

19″ LCD Monitor Wipro WA19W
38
No Backlight
Check C812(+)=16V
NG
OK
Check adapter
Check ON/OFF signal
Check Interface board or main board
NG
OK
Check IC801 PIN2=16V
NG
OK
Change on/off circuit
Check IC801 PIN13 have trian
g
le wave
NG
OK
Check IC801
Check IC801 PIN1
/
PIN15 PWM wave
NG
OK
Check IC801
Check Q805, Q806 Drain wave
NG
Check the output of PT801
Change IC801
Check connecter & lam
p
, feedback and
p
rotect circui
t
OK
NG
Check PT801
OK