Technical information

37
5. No Backlight
Check C802 (+) =12V
Change FB801,Check Q805
Q808, Q810
Check ON/OFF signal
Check Interface board
Check IC801 pin12=5V?
Change Q805.Q808 or Q810
Check the pin9&10 of IC801 have PWM wave
Change IC801
CheckQ801/Q802/Q804/
Q811or /Q812
Check the resonant wave
of pin6 & pin1 for PT801
Check the output of PT801
Check Q809Q801/Q802/Q811/Q812
Check connecter & lamp
OK
Change PT801
OK
OK
OK
OK
OK
NG
NG
NG
NG
NG
NG
Replace IC801
OK
NG