LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 95 -
4.8 Charger Troubleshooting
Charging Procedure
Troubleshooting Setup
- Connect TA
- Connect TA and battery to the phone
- Control the charging current by PM6650 IC
- Charging current flows into the battery
Check Point
Troubleshooting Procedure
- Connection of TA
- Check the charger connector
- Charging current path
- Check the charging current Path
- Battery
- Check the battery
TA
(4.6V)
Main
Battery
Charging Current Flow
Pass
Tr
(ON)
4.2~4.25V
Battery FET
(ON)
Battery charging circuit !!!!!
Route as equal length as possible !! --> ICHARGE , ICHARGEOUT
R300
smd_2125h_65_r
0.1
+VPWR
R301
100K
D1
D2
D3
D4
G
S
SI3493DV-E3
Q401
Q400
QST4
3
1
2
5
6
4
BATT_FET_N
ICHARGE
CHG_CNT_N
ICHARGEOUT
Содержание TU550
Страница 1: ...Date May 2007 Issue 1 0 Service Manual Model TU550 Service Manual TU550 Internal Use Only ...
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