Charging Trouble - LG Prada KE850 Service Manual

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
• Charging time : 3h under
• Charging current : 500mA
• Cutoff current : 100mA
• Low battery alarm
-. Idle : 3.62V
-. Dedicated : 3.50V
• 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
VCHG
Q203
C229
R219
6
S2
100K 10u
4
S1
1
D3
2
D2
5
D1
NDC652P
D201
CRS08
VBAT R225
0.15
C235
33u
- 79 -
5. Trouble shooting
charging operation.
C230
47n
3
VCH_CTL
G
VCHS