Back Light (For Sub Lcd & Key) - Samsung SGH-T100 Service Manual

5-11 Back Light (for sub LCD & Key)
LCD BACKLIGHT
Check the CN201 pin 21 = "H" ?
LCD backlight on ?
END
5-18
Backlight does not work
Backlight "ON" mode
in the menu?
Yes
R811 = "H" ?
Yes
No
Yes
No
Yes
Resolder R811, R812
Resolder Q802
Resolder R801~R808
and D800~D807
No
Select backlight "ON" mode
No
GPO1 by test S/W
KEY PCB LED
Check the
CN201 pin 21
Replace EL sheet
No
No
No
Flow chart of Troubleshooting and Circuit Diagram
Q802 pin 1 = "H" ?
Yes
Q802 pin 3 = "L" ?
Yes
Key LED on ?
Yes
END