LG B2000 Service Manual page 61

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4 . TROUBLE SHOOTING
(6) Checking TX IQt
TEST POINT
CIRCUIT
R
X
Q
R
X
I
U
5
0
0
R
X
I
S
I
4
2
0
5
T
X
I
T
X
I
T
X
Q
T
X
Q
Checking Flow
Check if there is
Any Major Difference
Refer to Graph 4-8
R
F
2
V
8
5
C
5
1
8
C
5
1
9
0
.
0
2
2
u
2
2
p
1
N
2
P
3
N
4
P
5
N
6
P
7
N
Redownload the Software
And calibrate
Graph 4-8
No
Similar?
Replace U500
Yes
- 60 -
Waveform
C
5
3
2
1
0
0
0
p
1
3
M
H
Z
Q
P
C
5
1
4
3
9
p
Q
N
I
N
C
5
1
6
3
9
p
I
P

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