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SAMSUNG Proprietary-Contents may change without notice
SGH-I300 Flow Chart of Troubleshooting and Circuit Diagrams
2-16
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2-10. Backlight Part
Backlight does not work
Yes
END
Yes
Yes
Backlight "ON" mode
in the menu
No
Select backlight
"ON" mode
No
Check the U501
Yes
Check the
Pin 24 of CN501
is high
No
Check the R502
Yes
Check the
connection
from CN501
No
Replace LCD module
LCD backlight on?
12V
C530
CTRL FB
3
2
GND
6
SW
VIN
5
VOUT
1
U501
4
C526
C528
R509
C527 C529
R502
R503
L501
VBAT
C531
LED-
LED+
LCD_PWM