LG GD310 Service Manual page 97

5. TROUBLE SHOOTING
5.13.4. Checking Transceiver Output Signals
TP1(LBNAD_PAM_IN)
TP1(LBNAD_PAM_IN)
LBAND_PAM_IN
HBAND_PAM_IN
TP2(HBNAD_PAM_IN)
TP2(HBNAD_PAM_IN)
1V5_VRF
MODE
GMSK
8PSK
LGE Internal Use Only
R407
10
C401
220N
2V85_VRF
R404
10
Figure 20. Transceiver Output Circuit
Checking Points
Figure 21. Transceiver Output
Table 3. Transceiver Output Operation
Transceiver Output
Fixed
Ramp Burst Control
FE2
33
VBIAS
34
VDDTX1V5
35
TX1
36
TX2
37
VDDTX2V8
38
VDDMIX2V8
39
GND3
40
GND4
41
TP2(HBNAD_PAM_IN)
TP1(LBNAD_PAM_IN)
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VDDRX2V8
20
VDDRX1V5
19
VCO_RC
18
VDDVCO2V8
17
EN
16
VDDXO2V8
15
FSYS1
14
GND1
13
X400
4
GND
1
HOT
Only for training and service purposes