22" LCD Color Monitor ASI DW22MBD
34
2.) No Backlight
Check F801=12V
NG
OK
Check adapter and F801
Check ON/OFF signal
Check Interface board or main board
NG
OK
Check IC801 PIN12=10.5V
NG
OK
Change on/off circuit
Check IC801 PIN5 have triangle wave
NG
OK
Change IC801
Check IC801 PIN9/PIN10 PWM wave
NG
OK
Check IC801
Check Q802, Q803 Drain wave
NG
Check the output of T801, T802
Check Q801/Q804/Q811/Q812
Check connecter & lamp, feedback and protect circuit
OK
NG
Change T801, T802
OK
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