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LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
1.TROUBLE SHOOTING
4.3 Checking TCXO Block
The output frequency (19.2MHz) of TCXO (X201) is used as the reference one of RTR6285 and
PM7540 internal VCO.
Schematic of the Crystal Part (19.2MHz)
TP3
z
H
M
2
.
9
1
A
5
7
_
M
2
_
9
1
_
H
L
0
1
0
5
-
G
T
1
0
2
X
3
2
4
1
T
N
O
C
V
C
C
V
D
N
G
T
U
O
2
0
2
R
0
0
1
8
5
2
C
n
0
1
0
6
2
C
n
0
0
1
S
F
4
0
H
S
7
C
T
2
0
2
U
2
4
1
5
C
C
V
D
N
G
V
5
8
.
2
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O
X
C
T
_
G
E
R
V
n
1
2
6
2
C
9
5
2
C
n
1
3
0
2
R
K
0
0
1
4
6
2
C
n
0
0
1
V
8
.
1
_
B
S
U
_
G
E
R
V
3
6
2
C
p
0
0
1
p
0
0
1
5
6
2
C
p
0
0
1
1
6
2
C
3
3
4
0
2
R
K
L
C
_
F
E
R
_
H
B
S
U
Z
H
M
2
.
9
1
_
R
T
R
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O
X
C
T
J
D
A
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R
T
R
z
H
M
2
.
9
1
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P
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X
C
T
B
v
e
R
TP3
Содержание Vodafone GM750
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