Only For Training And Service Purposes - LG KG280 Service Manual

4. TROUBLE SHOOTING
Checking Flow
LGE Internal Use Only
START
I/O Connector(CN300)
Is well-soldered ?
YES
Voltage at anode of
D200 = 5.2V ?
YES
Q200,D200,R213 are
well-soldered?
YES
Voltage across R213 is
about 10~100mV?
YES
0.7V < voltage(R212) < 1.3V?
YES
Battery is charged?
YES
Charging is
properly operating
Resolder the CN300
NO
Pin 12,13 : VCHARGE
Pin18 : GND
NO
The TA is out of order
Change the TA
NO
Resolder the
Q200, D200, R213
NO
Replace the
Q200 , D200
NO
Replace the
Q200
The battery may have
NO
problems.
Change the battery.
Copyright © 2007 LG Electronics. Inc. All right reserved.
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Only for training and service purposes