Charging Trouble - LG -T310i Service Manual

4.5 Charging Trouble

TEST POINT
CN205 & #1
pin
(connected to
TP01)
U201 & #1
pin (TP01)
CIRCUIT
VBUS_USB
LDO_OUT
C224
0.1u
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Only for training and service purposes
.
CHARGING IC
Connected to
CN205 #1 pin (TP01)
Connected to CN205 #1 pin (TP01)
TP01
TP01
1
VIN
2
ISET
3
GND1
4
LDO
5
IEOC
C225
R227
R228
1u
1.2K
3.9K
(25V)
Ichg=530/Riset=481.8mA
Ieoc=Rieoc/200=19.5%(93.95mA)
4. TROUBLE SHOOTING
Figure 4.5
1V8_VDD
VBAT
11
PGND
10
BATT
9
U201
PGB
8
CHGSB
7
GND2
6
EN_SET
C223
1u
(10V)
- 75 -
4. TROUBLE SHOOTING
R211
100K
_EOC
CHG_EN
C255
0.1u
LGE Internal Use Only