LG GT500 - Charger Trouble Shooting

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Only for training and service purposes
4. TROUBLE SHOOTING
4.10 Charger Trouble Shooting
Main Battery Charging Path
• Charging Procedure
- Connecting TA and Charger Detection
- Control the charging current by AB1000
- 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 connector
- Check the Charging current Path
- Check the battery
Direction of BAT and GND
Charging
Route as a differential pair
Phone ground return path
USB charging path
Discharging
Route as a differential pair
Make an Area at 8, 9 Layer
Causion when PCB lLayout
Charging Circuit
22p
C337
VBUS
2
C1
1
D302
KDS221E_RTK
A1_C2
3
A2
VBAT_H
1/4W
R324
VBAT
2012
1%
0.025
D1
D2
D3
D4
G1
G2
S1
S2
Q300 SIA911DJ
300K
R320
C330
22p
C331
33u
1%
1/4W
2012
0.1
R316
D1 D2
1 2 3
CN300
R314
0
CHS-
BDATA
FGS+
CHREG
DCIO_INT
FGS-
CHS+