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MX8550
START
Charging Connector CON400
Well-soldered?
Voltage at Pin1, Pin2
of D301 = 5V?
0.1V < Voltage of CHAR_MON< 1.22V
Voltage of pin 1 CON701 =
VBATT(+VPWR)
Is the battery charged?
Charging will operate properly
LG Electronics Inc.
Checking Flow
Checking Flow
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
Re-soldering CON400
The charging adaptor (TA) or USB cable(USB port
of computer) is out of order.
Replace U306
Check the soldering
YES
Replace U702
The battery may have the problem.
Change the battery and try again.
NO
Re-solder U702
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