5-10
Flow chart of trouble shooting
5-10 Back Light
Yes
END
Backlight does not work
Select backlight "ON" mode
Backlight "ON" mode
in the menu?
Between R306 and
R310 = "H" ?
GPO1 by test S/W
No
Yes
Yes
No
Check the
L300, U305, R306, Q301,
C314, C315, C316
U305 pin 7 210~230 VAC ?
LCD backlight on ?
Resolder CON1 pin 37, 38
or Replace EL sheet
No
Yes
No
LCD BACKLIGHT
KEY PCB LED
Resolder R310, R309
Q302 pin 2 = "H" ?
No
Yes
Resolder Q302
Q302 pin 3 = "L" ?
No
Yes
Yes
END
Key PCB LED on ?
Resolder J403
or Replace Key PCB
No
Summary of Contents for SGH-N100
Page 11: ...Exploded Views and Parts List 1 9 1 11 Desk Top Charger DESK TOP CHARGER GH44 00163A ...
Page 12: ...PCB Diagrams 2 PCB Diagrams 2 1 Main Top ...
Page 13: ...2 1 ...
Page 14: ...PCB Diagrams 2 1 Main Bottom ...
Page 15: ...2 2 ...