LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 124 -
4.14 Charging trouble
• Charging Procedure
- Connecting TA or USB Cable
- Control the charging current by PM6650-1M 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 or USB Cable
- Charging current path
- Battery
• Trouble Shooting Setup
- Connect TA or USB Cable and battery to the phone
• Trouble Shooting Procedure
- Check the charger connector
- Check the charging current path
- Check the battery
Battery charging circuit !!!!!
1%
2012
Route as equal length as possible! -> ICHARGE, ICHARGEOUT
+5V_PWR
+VPWR
10
Drain_B
Emitter
8
5
Gate
NC1
1
NC2
6
Source
3
Q701
NUS5530MN
7
Base
2
Collector
Collector_B
9
4
Drain
USB_VBUS
0.1
R713
6
4
VBATT
Q700
QST4
3
1
2
5
ICHARGE
BATT_FET_N
ICHARGEOUT
USB_CTL_N
CHG_CNT_N
Pass control Tr
(ON)
4.2~4.25V
Main
Battery
TA
(4.6V)
Battery FET
(ON)
Charging Current Flow
Pass control Tr
(ON)
USB Cable
(5.0V)
USB Charging control
TA Charging
control
Charging current
sensing
Battery charging
control
Q700
Q701
Q602
Содержание KS10
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