Charger Trouble Shooting - LG L602i Service Manual

4.17 Charger Trouble Shooting

Charging Current Flow
6
1
4.2~4.25V
Q402
SI3493DV-E3
Charging Procedure
- Connecting TA
- Control the charging current by PM6650 IC using USB_CNT_N or CHG_CNT_N signal
- Charging Current flows into the battery by control BATT_FET_N
Check Point
- Connection of TA
- Charging current path
- Battery
Trouble Shooting Setup
- Connect TA Cable and battery to the phone
Trouble Shooting Procedure
- Check the charger connector
- Check the charging current Path
- Check the battery
+5V_PWR
5 4 Q400
QST4
Pass control Tr
(ON)
2 3
CHG_CNT_N
ICHARGE
ICHARGEOUT
+VPWR
VBATT
BATT_FET_N
- 117 -
4. TROUBLE SHOOTING
TA
(5.4V)
TA Charging control
Charging current
sensing
Main
Battery
Battery charging
control