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4.16.3 Checking PAM Block
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2.2K
R107
68
R108
C141
NA
C137
NA
R114
120
56p
C136
15p
C140
C132
68p
G1
2
G2
3
G3
5
IN
1
O1
4
FL102
EFCH897MTDB1
R112
120
51
R115
33u
C127
C126
1u
+VPWR
C139
15p
56p
C138
22
PGND7
23
24
PGND8
25
PGND9
4
RSVD1
8
RSVD2
12
RSVD3
TX_EN
1
6
VAPC
VBATT
5
PGND1
PGND10
26
PGND11
27
PGND12
28
29
PGND13
30
PGND14
PGND15
31
32
PGND16
33
PGND17
PGND18
34
PGND19
35
18
PGND2
36
PGND20
PGND3
19
PGND4
20
21
PGND5
PGND6
SKY77329
U102
BS
3
DCS_PCS_IN
2
16
DCS_PCS_OUT
GND1
10
GND2
11
13
GND3
GND4
14
15
GND5
7
GSM_IN
9
GSM_OUT
17
R110
91
R109
91
GSM_TX
GSM_PA_EN
GSM_PA_BAND
GSM_PA_RAMP
DCS_PCS_TX
[Fig. 4.18] Schematic of PAM Block
[Fig. 4.19] Test Point of PAM Block
Test Point
Net name
Description
TP1
GSM_PA_RAMP
Power Amp Gain Control. Typically, 0.2 ~1.6V
TP2
GSM_PA_EN
Power Amp Enable (ON : >2.5V, OFF : <0.7V)
TP3
+VPWR
PAM Supply Voltage (Vcc > 3V)
TP3
TP1
TP1
TP2
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