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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
4.12 Charger Trouble Shooting
• Charging Procedure
- Connecting TA and Charger Detection
- Control the charging current by AB3100
- Charging current flows into the battery
• Check Point
- Connection of TA
- Charging current path :
- Battery
• Trouble shooting setup
- Connect TA and battery to the phone
• Trouble Shooting Procedure
- Check the charger connecter
- Check the Charging current Path : Red Line( )
- Check the battery
Main Battery Charging Path
Charging
Route as a differential pair
Discharging
CHARGING CIRCUIT
Route as a differential pair
USB charging path
Phone ground return path
C352
0.1u
N5
VSS_BEAR
VSS_SPKR
M7
D7
VSS4
VSS3
D6
VDD_REF
P7
VDD_SPKR
VREF
A13
VSS1
D4
VSS2
D5
VBAT_D
E2
VBUS
VDD_AUDIO
P13
VDD_AUXO
P3
P6
VDD_BEAR
A12
VDD_IO
G1
SP
ARE1
B10
SP
ARE2
A2
TEST
D12
TRICKLE
F2
G2
F1
J2
DCIO_INT
FGSENSEN
J13
FGSENSEP
J14
A14
IREF
H3
CHREG
CHSENSEN
H2
CHSENSEP
H1
C4
DAC_CLK
C5
DAC_DAT
DAC_STR
B5
DCIO
A11
BDATA
0.1u
VBAT
C343
KDS221E_RTK
D303
3
A1_C2
2
A2
1
C1
47p
C325
VDDE_1V8
R311
BATT_GND
VBAT_D
1u
D1
D2
D3
D4
G1
G2
S1
S2
SIA911DJ
Q302
VBAT_D
100K
R320
C344
C347
1u
0.1u
C334
22p
CN301
G1
G2
1
2
3
R319
300K
C340
22p
1u
C353
VBAT
R315
0.1
2012
1/4W
1%
VBUS
0
R313
33u
C335
VDDC_2V65
USFB13L
D302
0.025
1%
2012
R324
1/4W
VDD_REF
R314
0
BDATA
CHS-
FGS+
FGS-
VBUS
CHS+
CHREG
DCIO_INT
OTP
FGS-
FGS+
RF_CTRL_CLK
RF_CTRL_DATA
RF_CTRL_STR_1
DCIO_INT
TRICKLE
BDATA
CHREG
CHS-
CHS+
VBUS