Charging Trouble - LG KE600 - Cell Phone Service Manual

5. Trouble shooting

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
• Charger detect voltage : about 4.0V
• ChCharging time : 3h under
• Charging current : 600mA
• Cutoff current : 100mA
• Low battery alarm
- Idle : 3.50V
-. Dedicated : 3.58V
VCHG
R209 C227
6
100K 10u
4
1
2
5
D201
CRS08
R212
0.15
Q201 C228
S2
47n
S1
3
VCH_CTL
G
D3
D2
D1
NDC652P
VCHS
VBAT
C237
100u
• 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.
- 80 -