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5. Trouble shooting
5.2 Power on Trouble
Check Points
- Battery Voltage( Need to over 3.35V)
- Power-On Key detection (PWRON signal)
- Outputs of LDOs from PMIC
P R
P S
LGE Internal Use Only
Power On
W
R
O
_ N
N E
2 R
5 1
2 R
3 1
K 2
3 3
K 0
P R
W
R
O
N
2 R
0 2
2 C
1 3
1
u 0
0 1
K 0
EQBN0013701
N E
_ D
E K
_ Y
N I
VIO_2V62
2 R
6 1
0 1
K 0
U204
7
E
T X
S R
n T
6
O
W
R E
I _
T N
5
R _
S E
T E
4
TP2
NC7WZ08L8X
EUSY0102802
RTC_2V11
TP1
2 R
4 1
K 2
2 R
7 1
1
2
3
3
3 .
M
U203
6
5
4
EMX18
External Reset
RTC_2V11
8
1 A
C V
C
1
1 B
1 Y
2
2 Y
2 B
3
G
N
D
2 A
2 C
2 3
. 0
u 1
Copyright © 2009 LG Electronics. Inc. All right reserved.
- 70 -
P
W
R
O
N
P
M
I _
T N
P
M
S R
n T
Only for training and service purposes
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Table of Contents
Troubleshooting
