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4. TROUBLE SHOOTING
4.17.1 Step 1
TP2
(C535)
TP1
(CN500)
Figure 4-3. Power Source Block
Step 1
Check Point (C535) of
Power Source Block
Check Power source to
Check if main power
source input or not
Check Point (CN500)
in Power Source Block
To Check Power source
Check (C535 & CN500)
in Block
to check inner line
connection
From CN500 to C535
LGE Internal Use Only
V
B
A
T
_
H
C
1
1
A
2
2
K
D
No
3.4~4.2VO
K?
Yes
Proceed to the Step 2
3.4~4.2VO
K?
Yes
Open?
Yes
Resolder the terminals of CN500
In Power Source Block
- 124 -
V
B
A
T
2
0
1
2
R
5
1
3
R
o
u
t
e
1
/
4
W
0
1 .
1
%
U
S
B
c
h
a
r
g
i
n
g
p
a
t
h
D
5
0
2
A
1
_
C
2
3
C
N
5
0
0
S
2
2
1
E
_
R
T
K
1
2
3
B
A
T
T
E
R
4
C
O
N
N
E
C
H
S
B
C
3 -
E
N
Z
Y
0
B
A
T
T
_
G
N
D
2
0
1
2
R
5
1
9
R
o
u
t
e
a
s
a
1
/
4
W
0
0 .
2
5
1
%
R
5
2
1
No
Check The Power Supply
No
Change the Board
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
C
H
S
+
a
s
a
d
i
f
f
e
r
e
n
t
i
a
l
p
a
i
r
R
5
1
4
0
TP2
C
H
- S
(C535)
TP2
(C535)
TP1
(CN500)
B
D
A
T
A
TP1
Y
T
O
R
(CN500)
P
T
2
5
1 -
4
0
1
7
7
0
1
F
G
S
+
d
i
f
f
e
r
e
n
t
i
a
l
p
a
i
r
0
F
G
- S
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Table of Contents
Troubleshooting
