Samsung SGH-Z150 Service Manual page 44

Flow Chart of Troubleshooting
MAIN_LCD_BACKLIGHT
LED+
1 D4
2
3
4
5
67
C406
C405
C411
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VBATT_LCD
U402
12
D3
D2 11
EN
D1 10
C1+
9
C1- GND
8
VOUT IN
C2+ C2-
13
C412
7-16
LED3-
LED2-
LED1-