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4.5 Charging Trouble
TEST POINT
U300
CIRCUIT
EOC
CHG_EN
LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
OVP CHARGING IC
VCHG
1V81_VDD
VBUS_USB
1
2
3
4
5
6
C308
C309
1u
1u
(1608)
(1608)
Change to withstanding voltage from 6.3V to 25V
(080714)
Figure 4.5
U300
ISL9221
13
PGND
VDC
12
VDC_BYP
VUSB
11
BAT
_PPR
10
USB_BYP
_CHG
9
IVDC
_EN
8
GND
IMIN
7
IUSB
EUSY0351601
(1%)
(1%)
Change to withstanding voltage from 6.3V to 10V
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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4. TROUBLE SHOOTING
CN300
VBUS_OVP
VBAT
VCHG_OVP
C310
C311
C312
1u
1u
1u
(080714)
LGE Internal Use Only
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