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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
R1018
C1063
1000p
33u
C1059
39p
C1074
PGND20
36
19
PGND3
20
PGND4
PGND5
21
22
PGND6
23
PGND7
PGND8
24
PGND9
25
RSVD1
4
RSVD2
8
RSVD3
12
1
TX_EN
VAPC
6
5
VBATT
14
GND4
GND5
15
GSM_IN
7
GSM_OUT
9
PGND1
17
26
PGND10
27
PGND11
28
PGND12
PGND13
29
PGND14
30
31
PGND15
PGND16
32
PGND17
33
34
PGND18
35
PGND19
PGND2
18
U1001
SKY77329
3
BS
2
DCS_PCS_IN
DCS_PCS_OUT
16
10
GND1
11
GND2
GND3
13
3.3nH
C1069
+VPWR
0
R1020
C1062
39p
15p
C1060
15nH
C1075
TX_GSM
GSM_PA_EN
GSM_PA_BAND
GSM_PA_RAMP
TX_DCS_PCS
[Fig.] Schematic of PAM Block
[Fig.] 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
TP2
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