5-9. Back Light
Backlight does not work
Check the soldered
status of EL pad
Backlight
"ON" mode in
the menu ?
Q301 pin 1 = "High" ?
Check the
connection from CN201
to LCD Module
LCD backlight on ?
END
Y
Y
Y
Y
Y
Y
SAMSUNG Proprietary-Contents may change without notice
SGH-Q105 Flow Chart of Troubleshooting and Circuit Diagram
Replace LCD-Keypad PCB or resolder
N
Select backlight "ON" mode
N
Resolder or change Q301, R308
N
Replace LCD-Keypad PCB
N
Replace LCD-Keypad PCB
N
5-9