Charging - LG D686 Service Manual

3.6 Charging

D686 uses Switching Chaging IC for charging control. The Chaging IC(MAX8971EWP) circuit includes the charging pass transistor
detects the VDD and VBAT voltages, and its control driver. The Chaging IC(MAX8971EWP) maximum charging current is set around
1.2A.
Charging Procedure
- Supply the VCHG use a TA or u-USB cable
- The Chaging IC(MAX8971EWP) control the charging current
- Charging current flows into the main battery
Troubleshooting Check Point
- Connection of the TA or u-USB cable
- Main battery
CHARGER_IRQ_B
I2C_SENSOR_SDA
I2C_SENSOR_SCL
LGE Internal Use Only
D1
D2
D4
D3
D5
C3
A3
B4
B3
2
C5
C4
1
- 80 -
3. TROUBLE SHOOTING
U606(Charger IC)
C2
DC1 BST
DC2
C1
BYP
SFO
B1
PVL LX1
AVL LX2 B2
U606
GND PG1 A1
PG2 A2
VICHG
A4
I2CIN CS
A5
IRQB BAT
B5
SDA THM
SCL
Copyright © 2013 LG Electronics. Inc. All right reserved.
L602
1u
U606
Only for training and service purposes
10V