LG LG511C Service Manual page 91

LN510
4.3.1.2 Charging Trouble
START
Charging Connector CON3001
Well-soldered?
1
Voltage of pin 1, 2
at U3001 = 5V
2
Voltage of pin 8, 7
at U3001 = 5V
3
Voltage at +VBAT
of CON3002 > 2.6V
4
Voltage of +VPWR of
F3001 > 4V
Is the battery charged ?
Charging will operate properly
LG Electronics Inc.
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
Checking Flow
Checking Flow
Re-soldering CON3001
The charging adaptor (TA) or USB cable(USB port
of computer) is out of order.
The OVP is out of order. Replace U3001
Check the soldering of CON3002
Check the soldering of Q3001
Or Replace it
5
CHG_CNT_N =0V, and
BAT_FET_N =0V?
Check the soldering of Q3001
Or Replace it
The battery may have the problem.
Change the battery and try again.
90/168
NO
YES
Re-solder CON3002
NO
Check the soldering of
YES
U2001 or Replace it