Samsung SGH-X640 Service Manual page 30

F low Chart of Troubleshooting
Charging
VDD2
R508
END_OF_CHARGE
U502
1
ITERM _EN
2 BAT _ACPR 7
3
_CHRG VCC
4 GND PROG 5
GG GG
9 10 11 12
R511
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
VBAT
C507
8
CHG_ON
CHARGER_OK
6
R512
7- 6
R507
R509 C505
V_EXT_CHARGE
C508 C506
ZD501
MES_BATT