Charging Trouble - LG MG220 Service Manual

4.6 Charging Trouble

• Charging method : CC-CV
• Charger detect voltage : about 5.2V
• Charging time : 3h under
• Charging current : 500mA
• Cutoff current : 100mA
• Low battery alarm
- Idle : 3.60V
- Dedicated : 3.50V
4.2V~3.93V
Block Diagram
VCHG
ICTL
• Switch-off voltage : 3.35V
• Charging temperature ADC range
- ~ -20°C : small charging operation.
- -20°C ~ 60°C : charging.
- 60°C ~ : not charging operation small charging operation.
3.92V~3.79V 3.79V~3.72V
CHARGING BLOCK
Charging Current
R617
C600 C601
C602
4.7u 4.7u
100K
22n
3
PCHG
VCCS
VBATS
- 49 -
4. TROUBLE SHOOTING
3.72V~3.62V
U600
NDC652P
6
S2
4
S1
G
1
D3
D2 2
5
D1
R619 15
D600
CUS02
VBAT
R620
0.2
C605
10u
(2012)