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4. TROUBLE SHOOTING
4.5 Charging Trouble
4.5 Charging Trouble
SETTING : Connect the battery (3.4 ~ 4V) and the charging adaptor(TA) to the phone
Charging Connector(CN601)
~0.7< Voltage(Q300) < ~1.3V
START
well-soldered?
Yes
Voltage at Pin 7 of U301
= 5.2V?
Yes
R300, Q300, D300
well-soldered?
Yes
Voltage across
D300 = ~0.3V
Yes
Voltage across
R300 is ~160mV.
Yes
Yes
Is the battery charged ?
Yes
CHARGING WILL
OPERATE PROPERLY.
No
Re-solder CN601.
No
The charging adaptor(TA) is out of order.
Change the charging adaptor.
No
Re-solder R300, Q300, D300.
No
Replace D300.
No
Replace R300.
No
Replace Q300
No
The battery may have the problem.
Change the battery and try again.
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