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SGH-X150 Flow Chart of Troubleshooting
2-1-7. LCD backlight
Backlight does not work
Backlight ON "TIME"
mode in the menu?
Check connecting
between PBA and LCD
Check U204 pin #1
(C225) = 10V ?
LED+
LED-
R242
R257
C225
Yes
connector
Yes
Yes
END
U204
SW 6
2
VIN
5
GND
3
R241
FB
C224
No
Select backlight "15 sec" mode
No
No
Check the LCD
VBAT
L201
LED_EN
R256
TA223
2-12
Check FPCB
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