Samsung SGH-S501i Service Manual page 53

Flow Chart of Troubleshooting
VCAM_EN
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VBAT
C335
VBAT
VLDO_1.5V
TA301
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VCAM_2.8V
Q300
3
VIN
VOUT
2
GND
NC
1
STBY
GND
6
U305
L301
1 SW 5
VIN
2 GND
3 FB 4
EN
9-16
4
5
C332
VCCD_1.8V
C329