LG GS290 - Page 94

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4. TROUBLE SHOOTING
GS290 Operational Description Revision B
LG Electronics 95/136 LGE Property
4.13.4. 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 OutputMODE
TP1(LBNAD_PAM_IN)G
TP2(HBNAD_PAM_IN)G
TP1(LBNAD_PAM_IN
TP2(HBNAD_PAM_IN
U500
PMB6272
20
19
18
17
16
15
14
13
12
2
1
2211
32
01
42
9
528 6
2
7
72
6
82
5
924 0
3
3
13
2
23
1
33
34
35
36
37
38
39
40
41
GND4
GND3
VDDMIX2V8
VDDTX2V8
TX2
TX1
VDDTX1V5
VBIAS
FE2
A 1EF
XA 8V2SAIBD
DV
B X1X
R
XB 1X
R
8V2
G
IDDDV X2X
R
A
D
2XR
K
L
C
2DN
G
5V1
GI
D
D
DV X3X
R
3SYSF 3XR 2SYSF X4X
R
OX 4X
R
X
OX 5V
1AN
L
D
DV
GND1
FSYS1
VDDXO2V8
EN
VDDVCO2V8
VCO_RC
VDDRX1V5
VDDRX2V8
10
R507
220n
C522
LBAND_PAM_IN
HBAND_PAM_IN
VC1
VC2
TP1(LBNAD_PAM_IN)
TP2(HBNAD_PAM_IN)