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Flow Chart of Troubleshooting and Circuit Diagrams
3-43
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C634 : COG type(30ppm)
Qualcomm recommend
C635 : COG type(30ppm)
C636 : CPPS type
R114
6
01
R
R116
R111
C138
C129
R113
13
G
G
14
HIOUT
5
1
LOWOUT
3
VCC
10
VCTL
VSW1
11
9
VSW2
2
G
4
G
6
G
G
7
8
G
G
12
VCO100
V_2.85TX
C134
80
1
R
C123
C131
C132
R118
C125
R103
C124
R112
R117
R104
C135
MOD_CP
DCSTX_IN
GSMTX_IN
TXVCO
TX_VCO_1_EN
TX_VCO_0_EN
VBAT
C113
C116
L121
C157
C105
9
4
RSVD
8
RSVD
RSVD
12
1
TXEN
VAPC
6
5
VBATT
DCS|PCSOUT
16
G
13
G
10
11
G
14
G
G
15
17
G
GSMIN 7
GSMOUT
PAM100
3
BS
2
DCS|PCSIN
C115
C108
L103
C155
C118
C156
C106
R101
C117
DCS_TX
GSM_TX
GSMTX_IN
DCSTX_IN
BAND_SEL
TX_EN
GSM_PA_PWR_CTL