LG KP175 - Charging Trouble

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4. TROUBLE SHOOTING
4.5 Charging Trouble
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
FL201
U205
CN202
U300
TEST POINT
1u
C307
2V8_MV
1u
C306
1V8_VCAM
C305
1u
8
VOUT1
VOUT2
7
R305
100K
EN1
2
3
EN2
5
GNDNC1
4
6
NC2
9
PGND
1
VIN
U300
RT9011-MGPQW
VBAT
2V8_VEXT
VCHG_ABB
1u
C244
_CHG
R238
20K
VCHARGE
R237
12K
C248
1u
VBUS_USB
USB_VBUS
R236
10K
C245
1u
_PPR
C246
1u
BAT
11
8
GND
6
IMIN
IUSB
7
IVDC
9
13
PGND
10
USB_BYP
VDC
1
VDC_BYP
12
2
VUSB
_CHG
4
_EN
5
3
_PPR
ISL9221U205
1u
C247
VBAT
_CHG_EN
CIRCUIT
Figure 4.5