4. TROUBLE SHOOTING
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Only for training and service purposes
LGE Internal Use Only
4.6 Charging
E455 uses Chager IC(Mini ABB) for charging control. The Chager IC(SNB1058A3RSMR) circuit includes the charging pass transistor
detects the VDD and VBAT voltages, and its control driver. The Chager IC(SNB1058A3RSMR) maximum charging current is set around
700mA.
Charging Procedure
- Supply the VCHG use a TA or u-USB cable
- The Chager IC(SNB1058A3RSMR) ) control the charging current
- Charging current flows into the main battery
Troubleshooting Check Point
- Connection of the TA or u-USB cable
- Main battery
U402
33
28
27
26
13
25
11
10
24
23
31
22
29
21
20
14
12
7
2
9
5
32
19
18
17
8
30
6
16
4
3
15
1
OUT1
AUDL
VIN
OUT3
AUDR
GND1
SC
L
LED2
MIC
CLDO
R2_2K
DSS
OUT4
LED3
OUT2
LED1
USB1DP
USB2DP
ID
D+
SD
A
D-
INTB
VBUS1
VBUS2
LED4
USB1DM
VBAT1
USB2DM
VBAT2
EXPDET
GND2
PGND
1u
C451
10n
C450
1u
C455
C454
1u
C466
1u
R402
10
K
C465
1u
C464
1u
1u
C463
+1V8_VIO_MTK
VBATT
I2C_SENSOR_SDA
I2C_SENSOR_SCL
+1V8_CAM_VI
O
VCHG_LDO_4V9
MINIABB_INT
+2V8_CAM_VC
M
+2V8_CAM_AVD
D
MAIN_WHITE
+1V8_CAM_DVDD
VBUS_CHG_IN
Mini ABB + LDO
PU : UART
DSS --> OPEN/PD : USB
U402
U402