Table of Contents
Advertisement
5-9 Back Light
LCD BACKLIGHT
CN200
Pin 35, 36, 39, 40
LCD backlight on ?
END
Flow chart of trouble shooting
Backlight does not work
Backlight "ON" mode
in the menu?
Yes
Between R215 and R217 = "H"?
Yes
No
3.3V?
Yes
No
Yes
Resolder R215, R217
Resolder Q201
Resolder CN211
or Replace Key PCB
No
Select backlight "ON" mode
No
GPO1 by test S/W
KEY PCB LED
Check the circuit related U100
Resolder LCD or Check Q201
No
No
No
Q201 pin 1 = "H" ?
Yes
Q201 pin 3 = "L" ?
Yes
Key PCB LED on ?
Yes
END
5-16
Advertisement
Table of Contents
