Acer PF-801 Informacje Techniczne Pobierz pdf (Strona 37)

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

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