Acer X233HZ User Manual

Page 36

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36

2.) No Backlight

Check if the input voltage of inverter part is 16V

NG

OK

Check adapter part

Check ON/OFF signal

Check Interface board

NG

OK

Check IC801 PIN12=14.5V

NG

OK

Check ON/OFF circuit

Check IC801 PIN5 have triangle wave

NG

OK

Change IC801

Check IC801 PIN9/PIN10 PWM wave

NG

OK

Check R816/R817/R818/R819

Check the output of PT801

Check connecter & lamp

OK

NG

Change PT801

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