35
2.) No Backlight
Check F801 = 14.5V
NG
OK
Check adapter or MB
Check ON/OFF signal
Check Interface board
NG
OK
Check U801 PIN12=14.5V
NG
OK
Change Q802, Q804
Check U801 PIN10, 9 have the output of square wave at short time
NG
OK
Change U801
Check Q803, Q812 PIN5, 6, 7, 8 have the output of square wave at short time.
NG
OK
Check Q801, Q803, Q805, Q807, Q812, Q813
Check the output of PT801
Check connecter & lamp
OK
NG
Change PT801
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