Technical information

40
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=15V
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