LG KP500 - RTC Trouble

5.12 RTC trouble
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5. Trouble shooting
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Only for training and service purposes
START
Check TP1 is
high (1.0V)?
Check RTC_2V11
is high?(2.0v)
Assemble
Change BAT500
Change R500 or
Change U300,
Change Main PCB
Yes
No
No
Check All of BAT500 solder
Yes
2
V
0
.
5
m
Ah
B
A
C
KUP B
A
T
TER
Y
R
TC
_2
V
11
B
AT
5
0
0
N
B
L41
4R-
F
9J
S
B
C
L
0
0
0
1
7
0
1
|
b
a
t
t
_
n
b
l
4
1
4
r
_
f
9
j
0
0
5
R
K
7
.4
BAT500
RTC_2V11
TP1
R500
RTC_2V11
TP1