LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5. Trouble shooting
- 74 -
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 retest
Check solder
U401 or replace it
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
No
18pin IO
(CN401)
TP1: Source pin
U401
TP2: Output pin
U401
Содержание KP500
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