LG AR140B, Руководство по обслуживанию

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5. TROUBLE SHOOTING
5.13.4. Checking Transceiver Output Signals
Figure 20. Transceiver Output Circuit
Checking Points
Figure 21. Transceiver Output
Table 3. Transceiver Output Operation
Ramp Burst Control 8PSK
Fixed GMSK
Transceiver Output MODE
TP1(LBNAD_PAM_IN)
TP2(HBNAD_PAM_IN)
TP1(LBNAD_PAM_IN)
TP2(HBNAD_PAM_IN)
220N
C401
1V5_VRF 2V85_VRF
10
R404
0
0
4
U
2
7
2
6
B
M
P
20
19
18
17
16
15
14
13
1
2
2
1
2
2
1
1
3
2
0
1
4
2
9
5
2
8
6
2
7
7
2
6
8
2
5
9
2
4
0
3
3
1
3
2
2
3
1
33
34
35
36
37
38
39
40
41
GND4
GND3
VDDMIX2V8
VDDTX2V8
TX2
TX1
VDDTX1V5
VBIAS
FE2
A
1
E
F
X
A
8
V
2
S
AI
B
D
D
V
B
X
1
X
R
X
B
1
X
R
8
V
2
GI
D
D
D
V
X
2
X
R
A
D
2
X
R
K
L
C
2
D
N
G
5
V
1
GI
D
D
D
V
X
3
X
R
3
S
Y
S
F
3
X
R
2
S
Y
S
F
X
4
X
R
O
X
4
X
R
X
O
X
5
V
1
A
N
L
D
D
V
GND1
FSYS1
VDDXO2V8
EN
VDDVCO2V8
VCO_RC
VDDRX1V5
VDDRX2V8
10
R407
X400
1
4
GND
HOT
LBAND_PAM_IN
HBAND_PAM_IN
TP1(LBNAD_PAM_IN)
TP2(HBNAD_PAM_IN)