4. TROUBLE SHOOTING
- 118 -
4.18 Charger Trouble Shooting
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
5
6
4
Q401
QST4
3 B
1
C1
C2
2
B
3
C1
1
2
C2
5
6
4
QST4
Q400
0.1
R401
D1
D2
D3
D4
G
S
SI3493DV-E3
Q402
ICHARGEOUT
+VPWR
BATT_FET_N
CHG_CNT_N
VBATT
USB_VBUS
ICHARGE
+5V_PWR
USB_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
Summary of Contents for U310
Page 3: ... 4 ...
Page 20: ...3 TECHNICAL BRIEF 21 ...
Page 33: ...3 TECHNICAL BRIEF 34 Figure 3 5 10 1 Bluetooth system architecture ...
Page 47: ...3 TECHNICAL BRIEF 48 Figure PM6650 2M Functional Block Diagram ...
Page 72: ...4 TROUBLE SHOOTING 73 4 2 SIGNAL PATH WCDMA Tx PATH WCDMA Rx PATH ...
Page 76: ...4 TROUBLE SHOOTING 77 ...
Page 90: ...4 TROUBLE SHOOTING 91 ...
Page 110: ...4 TROUBLE SHOOTING 111 CN501 C537 C538 MSM6250A ...
Page 116: ...4 TROUBLE SHOOTING 117 C216 C217 for MIC serial capacitor MSM6250A ...
Page 119: ...4 TROUBLE SHOOTING 120 Q400 Q401 Q402 VBATT GND ...
Page 149: ... 150 8 pcb layout ...
Page 150: ... 151 8 pcb layout ...
Page 151: ... 152 8 pcb layout ...
Page 152: ... 153 8 pcb layout ...
Page 153: ... 154 ...
Page 160: ...9 Calibration RF Auto Test Program 161 9 3 1 Example for Calibration Click START U310 ...
Page 163: ... 164 ...
Page 187: ...Note ...
Page 188: ...Note ...