5. Trouble shooting
- 80 -
5.3 Charging trouble
Check Points
-Connection of TA (check TA voltage 4.8V)
-Charging Current Path component voltage drop
-Battery voltage
•
Charging method : CC-CV
•
Switch-off voltage : 3.35V
•
Charger detect voltage : about 4.0V
•
Charging temperature ADC range
•
ChCharging time : 3h under
- ~ -20
°
C : small charging operation.
•
Charging current : 500mA
- -20
°
C ~ 60
°
C : charging.
•
Cutoff current : 100mA
- 60
°
C ~ : not charging operation small
•
Low battery alarm
charging operation.
- Idle : 3.62V
-. Dedicated : 3.50V
3.69V~3.62V
4.2V~3.86V
3.85V~3.75V 3.75V~3.69V
C235
100u
CRS08
D201
R217
100K
D2
D3 D4
G
S
Q201
SI3457BDV
D1
VBAT
0.15
R220
VCHG
C224
4.7u
VCHS
VCH_CTL
Summary of Contents for KE820
Page 1: ...Service Manual Model KE820 Service Manual KE820 Date August 2006 Issue 1 0 ...
Page 3: ... 4 ...
Page 5: ... 6 ...
Page 46: ...3 TECHNICAL BRIEF 47 Figure 18 EN SET port control method ...
Page 69: ...4 PCB layout 70 Figure 45 Main PCB bottom Figure 46 Main PCB bottom placement ...
Page 70: ...4 PCB layout 71 Figure 47 Sub PCB top Figure 48 Sub PCB top placement ...
Page 71: ...4 PCB layout 72 Figure 49 Sub PCB bottom Figure 50 Sub PCB bottom placement ...
Page 114: ...6 Download S W upgrade 115 6 2 Download program user guide ...
Page 115: ... 116 6 Download S W upgrade ...
Page 116: ... 117 6 Download S W upgrade ...
Page 117: ... 118 6 Download S W upgrade ...
Page 124: ... 125 8 PCB LAYOUT ...
Page 125: ... 126 8 PCB LAYOUT ...
Page 126: ... 127 8 PCB LAYOUT ...
Page 127: ... 128 8 PCB LAYOUT ...
Page 141: ... 142 ...
Page 161: ...Note ...
Page 162: ...Note ...