Trouble Shooting; Power On Trouble - LG GD580 Service Manual
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- User manual (114 pages) ,
- User manual (210 pages) ,
- User manual (74 pages)
Table of Contents
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4. Trouble Shooting
4. TROUBLE SHOOTING
4.1 Power ON Trouble
START
The voltage of mainbattery
is higher than 3.3V ?
Yes
END key operates well?
UART_TX(TP1) level is 1.8V
when END key pressed.
Yes
Check
the voltage.
VRADA_2V8 (TP2) 2.8V
VDDD_1V5 (TP3) 1.5V
VDDE_1V8 (TP4) 1.8V
VDDC_2V65(TP5) 2.65V
VDDH_2V75(TP6) 2.75V
VDDF_2V5 (TP7) 2.5V
VDDG_2V85 (TP8) 2.85V
VDDK_2V75(TP9) 2.75V
VCORE(TP10) 1.2V
No
Change main board
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
No
change
main battery
Follow the
No
keypad Trouble
shooting guide
TP1
0
TP8
TP3 TP4
TP2
TP2
TP3
TP4
C
4
3
6
C
4
1
4
C
4
1
2
1
u
1
u
2
2 .
u
C
1
2
V
D
D
_
A
B
1
1
E
X
T
L
D
O
F
1
2
V
D
D
_
D
D
1
2
V
D
D
_
E
TP5
A
1
1
V
D
D
_
C
B
1
2
V
D
D
_
H
A
9
V
D
D
_
F
TP6
A
7
V
D
D
_
G
M
1
2
V
D
D
_
K
J
1
1
V
D
D
L
P
TP7
C
4
2
0
C
4
1
0
C
4
1
7
C
4
1
6
C
4
0
6
1
u
1
u
1
u
1
u
1
u
TP8
B
2
V
B
U
C
K
A
2
V
D
D
B
U
C
K
A
1
TP9
S
W
B
U
C
K
B
1
V
S
S
B
U
C
K
- 79 -
V
P
P
F
L
A
S
H
R
6
2
8
4
7
0
O
N
S
W
B
_
N
D
C
N I
R
6
2
9
4
7
0
A
P
P
_
A
C
C
_
U
A
R
T
_
T
X
R
6
3
0
1
K
A
P
P
_
A
C
C
_
U
A
R
T
_
R
X
C
6
0
1
1
0
0
n
< Main Board – Bottom side >
R
4
0
9
0
R
4
3
4
R
4
0
0
8
0
R
4
2
3
0
R
4
1
9
0
R
4
3
8
R
4
0
7
0
0
R
4
2
9
4
7 .
K
C
4
1
9
V
B
A
T
_
C
V
B
A
T
1
u
1
6
0
8
1
2
0
o
h
m
(
@
1
0
0
M
H
) z
F
B
4
0
1
B
L
M
1
8
P
G
1
2
1
S
N
1
J
L
4
0
1
4
7 .
u
C
4
1
5
C
4
0
7
1
0
u
1
0
0
n
L
o
c
l a
G
o r
u
n
d
P
a l
n
e
4. Trouble Shooting
TP1
V
P
P
F
L
A
S
H
O
N
U
T
U
R
V
B
A
T
A
R
R
A
Y
G
N
D
V
B
A
T
U
T
6
0
1
C
T
S
1
2
R
T
S
1
1
D
S
R
1
0
N
C
4
U
T
X
9
N
C
3
U
R
X
8
N
C
2
P
W
7
V
B
A
V
B
A
T
6
O
N
_
S
O
N
_
S
W
5
V
C
H
A
N
C
1
4
T
X
T
3
R
X
R
2
G
N
D
G
N
1
2
5 .
G
3
G
A
R
R
A
Y
T
P
P
O
N I
T
TP7
TP5
TP6
TP2
TP4
TP3
TP9
V
R
A
D
A
_
2
V
8
V
B
A
T
V
D
D
D
_
1
V
5
V
D
D
E
_
1
V
8
V
D
G I
R
A
D
_
1
V
8
V
B
A
T
V
R
A
D
A
_
2
V
8
V
D
D
D
_
1
V
5
V
D
D
E
_
1
V
8
V
D
G I
R
A
D
_
1
V
V
D
D
C
_
2
V
6
5
V
D
D
H
_
2
V
7
5
V
D
D
F
_
2
V
5
V
D
D
G
_
2
V
8
5
V
D
D
K
_
2
V
7
5
V
D
D
C
_
2
V
6
5
V
D
D
H
_
2
V
7
5
V
D
D
F
_
2
V
5
V
D
D
G
_
2
V
8
5
V
D
D
K
_
2
V
7
5
V
B
A
C
K
U
P
B
A
T
4
0
1
V
C
O
R
E
TP10
P
a
a r
l l
l e
i w
h t
V
C
O
R
E
V
B
U
C
K
_
F
B
R
4
0
6
V
C
O
R
E
0
C
4
0
9
1
0
u
LGE Internal Use Only
D
U
S
B
D
R
T
W
R
X
U
A
R
T
X
D
8
- Quick Links:
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Table of Contents
Troubleshooting
