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GSM_TX
DCS_TX
MOD_CP
TX_VCO_0_EN
TX_VCO_1_EN
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C602
C600
C647
L601
G
10
G
11
VCC
12
C644
G
13
G
14
R601
C605
DCS|PCS_OUT
15
G
16
L609
C606
V_2.85TX
C648
R611
C635
R612
C634
C636
Qualcomm recommend
C634 : COG type(30ppm)
C635 : COG type(30ppm)
C636 : CPPS type
R617
C642
R619
C643
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Flow Chart of Troubleshooting and Circuit Diagrams
17
9
8
GSM_IN
7
VRAMP
6
GND
5
PAM600
VBATT
4
TXEN
3
BS
2
DCS|PCS_IN 1
VBAT
C617
C619
TA600
GSMTX_IN
DCSTX_IN
C628
C629
3
VCC
10
1
VCTL
LOWOUT
11
VSW1
VCO600
5
HIOUT
9
VSW2
14
13
12
8
7
6
4
2
9-28
R600
R621
C610
C613
C611
R607
R608
R614
R615
C640
R618
GSMTX_IN
GSM_PA_PWR_CTL
TX_EN
BAND_SEL
DCSTX_IN
TXVCO
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