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5-10 Back Light
LCD BACKLIGHT
Q403 pin 3 = "L" ?
Yes
LCD backlight on ?
Yes
END
5-18
Backlight does not work
Backlight "ON" mode
in the menu?
Yes
R575 = "H" ?
Yes
No
No
Resolder R575,R579
or Resolder Q403
Resolder
R572,R573,R574,R725,R745,
R746,R747,R748 or Replace
No
Select backlight "ON" mode
No
KEY PCB LED
Resolder R575,R579
or replace Q403
Replace LCD
No
PBA
Flow Chart of Troubleshooting and Circuit Diagrams
GPO1 by test S/W
No
Q403 pin 3 = "L" ?
Key PCB LED on ?
END
Yes
Yes
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