Charger Troubleshooting - LG -E960 Service Manual

4.23 Charger Troubleshooting

a. Current flow
- LGE960 Charging scenario is stated from bottom side micro USB connector of LGE960. The charging current flows step
by step, USB connector on FPCB to over voltage protection IC (protect up to 28V, PM8921 internal support) to charging
IC(PM8921 internal charger).
b. Charging current setting
- The charging current is set to max 900mA. The constant current period is set until voltage up to 4.3V. The constant
voltage period is ended up to cut-off current of 100mA.
Using PM Internal OVP 28V(USB_IN)
R10008 0
VADAPTER
VBUS_USB_IN
QCT's Recommend
C10003
1u
LGE Internal Use Only
MOTOR_VDP
MOTOR_VDN
2mm
Rev.E
ZD10003
C10004
USB_DP
33p
USB_DN
DNI
C23012
C23013 10u
C23016 1u
C23021 4.7u
Rev.B
L10001 82n
L10003 82n
ZD10001 ZD10002
FL10001
KEY_G_LED_DRV_N
2
P2 P4
1
P1 P3
EAM62451101
ICMEF112P350MFR
INNOCHIPS
Rev.E
1.5mm
Rev.D
Rev.B
- 168 - Copyright © 2012 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
CN10001
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
4 16
3 17
ENBY0040301
GB042-34S-H10-E3000
LS-MTRON
Battery
System
Only for training and service purposes
34
33
32
31
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28
27
26
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