LG KP500 - Product Care and Maintenance

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Only for training and service purposes
5. Trouble shooting
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START
18pin IO(CN401)
Is soldered ?
Source pin
of U401 = 5.1V ?
Output pin
of U401 =4.2V?
Resolder the
CN401
Battery voltage
is over 3.4V?
Charge is operating
The TA can be
broken
Change other TA
then retes
t
Check solder
U401 or replace i
t
Waiting until
battery
Voltage goes up
to 3.4V
Yes
Yes
Yes
Yes
Yes
No
No
No
No
Battery thermistor
value
is about 68K?
Change the
Battery
After check
thermistor
N
o
18pin IO
(CN401)
TP1: Source pin
U401
TP2: Output pin
U401