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5-10 Back Light
LCD BACKLIGHT
Check the CN105 pin 17 = "H" ?
LCD backlight on ?
END
5-17
Backlight does not work
Backlight "ON" mode
in the menu?
Yes
U108 pin J3 = "H" ?
Yes
No
Yes
No
Yes
Resolder R141, R149
Resolder Q107
Resolder CN503
or Replace Key PCB
No
Select backlight "ON" mode
No
GPO1 by test S/W
KEY PCB LED
Check the
CN105 pin 17
Replace EL sheet
No
No
No
Flow chart of trouble shooting and Circuit Diagram
Q107 pin 1 = "H" ?
Yes
Q107 pin 3 = "L" ?
Yes
Key PCB LED on ?
Yes
END
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