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5-9
SGH-Q208 Flow Chart of Troubleshooting and Circuit Diagrams
5-9. Back Light
Backlight does not work
Y
Y
N
Y
Backlight
“ON” mode in
the menu ?
Select backlight “ON” mode
N
Y
Q301 pin 1 = “High” ?
Resolder or change Q301, R322
N
Y
Check the
connection from CN203
to LCD Module
Replace FPCB Connector
N
Y
LCD backlight on ?
Replace EL between LCD and
LCD PCB
END
Check the soldered status of EL pad