4. TROUBLE SHOOTING
- 117 -
4.19 Charger Trouble Shooting
Charging Current Flow
Charging Procedure
- Connecting TA or USB Cable
- Control the charging current by PM6050 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
D2
D3
D4
G
S
Q402
SI3493DV-E3
D1
Q400
QST4
3 B
1
C1
C2
2
5
6
4
R406
0.1
B
3
C1
1
2
C2
5
6
4
QST4
Q401
+5V_PWR
USB_CNT_N
CHG_CNT_N
VBATT
+VPWR
USB_VBUS
ICHARGE
BATT_FET_N
ICHARGEOUT
Pass control Tr
(ON)
4.2~4.25V
Main
Battery
TA
(4.6V)
Battery FET
(ON)
Pass control Tr
(ON)
USB Cable
(5.0V)
USB Charging control
TA Charging control
Charging current
sensing
Battery charging
control
Summary of Contents for U890
Page 1: ...Date April 2006 Issue 1 0 Service Manual Model U890 U890c Service Manual U890 U890c ...
Page 3: ... 4 ...
Page 20: ...3 TECHNICAL BRIEF 21 ...
Page 46: ...3 TECHNICAL BRIEF 47 Figure PM6650 2 Functional Block Diagram ...
Page 70: ...4 TROUBLE SHOOTING 71 4 2 SIGNAL PATH ...
Page 109: ...4 TROUBLE SHOOTING 110 CN600 50pin LCD connector CN901 C907 C911 FB901 FB902 ...
Page 115: ...4 TROUBLE SHOOTING 116 C226 C227 for MIC serial capacitor ...
Page 118: ...4 TROUBLE SHOOTING 119 Q400 Q401 Q402 VBATT GND ...
Page 139: ...Table 2 1 1 RF Block Component 6 BLOCK DIAGRAM 140 ...
Page 140: ...6 BLOCK DIAGRAM 141 6 2 Interface Diagram U890 Interface Diagram ...
Page 142: ...6 BLOCK DIAGRAM 143 Top Side ...
Page 143: ...6 BLOCK DIAGRAM 144 Bottom Side ...
Page 152: ... 153 8 pcb layout ...
Page 153: ... 154 8 pcb layout ...
Page 154: ... 155 8 pcb layout ...
Page 155: ... 156 8 pcb layout ...
Page 156: ... 157 8 pcb layout ...
Page 157: ... 158 8 pcb layout ...
Page 163: ...9 CALIBRATION 164 9 3 HOT KIMCHI Example Choose_U890 ...
Page 164: ...9 CALIBRATION 165 Click APPLY button Click START button ...
Page 165: ...9 CALIBRATION 166 Click Run button to lunch RF AUTOTEST ...
Page 167: ... 168 ...
Page 191: ...Note ...
Page 192: ...Note ...