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4.17.2 Checking RF Tx Level
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
HIGH
HIGH
HIGH
HIGH
HIGH
LOW
EGSM TX
LOW
DCS RX
LOW
PCS
EGSM/PCS RX
ANT_SEL0
ANT_SEL2
ANT_SEL1
LOW
LOW / HIGH
LOW
HIGH
LOW
GSM
ANTENNA SWITCH MODULE LOGIC
UMTS2100
DCS/PCS TX
HIGH
LOW
DCS
2.2K
R107
OUT101
27nH
L116
27nH
33p
L117
C112
C141
NA
C137
NA
56p
C136
33p
C103
C111
33p
ANT101
ANTENNA
VREG_RF_SMPS
C132
68p
L110
39nH
NA
L106
6.8nH
L109
L113
6.8nH
L115
NA
33u
C127
C126
12nH
1u
L111
KMS-518
SW101
A
C
G1
G2
C104
0.1u
L102
1.5p
GND9
7
NC
22
PCS_RX1
PCS_RX2
21
PGND1
25
PGND2
26
8
UMTS_TX_RX
5
VC1
4
VC2
VC3
3
VDD
6
ANT
10
DCS_PCS_TX
13
DCS_RX1
20
DCS_RX2
19
EGSM_RX1
24
23
EGSM_RX2
16
EGSM_TX
1
GND1
2
GND2
GND3
9
GND4
11
12
GND5
GND6
14
15
GND7
GND8
17
18
LSHS-M090UH
FL101
56p
C138
5.6nH
L105
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
33p
C113
2.7nH
L103
15nH
C102
56nH
L104
27nH
L107
27nH
L114
5.6nH
L108
GSM_PA_RAMP
ANT_SEL0
ANT_SEL1
ANT_SEL2
[Fig. 4.16] Schematic of the GSM Tx Block
[Fig. 4.17] Test Point of GSM Tx Block
TP2
TP3
TP1
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