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Flow Chart of Troubleshooting
<RF CONNECT>
ANT101
ANT102
RFS100
C162
C160
C161
VRFRX1_2.65V
R108
GSM_ANT_SEL0_N
R109
GSM_ANT_SEL1_N
R110
GSM_ANT_SEL2_N
C128
C129
GSM_BAND
GSM_PA_EN
VBATT
R117
C150
C149
TA100
C151
GSM_PA_PWR_CTL
GND
GND
R_BIAS1
VDDA
V_TUNE1
VDDA
U101
TCXO
VDDA
WMIX_LNN
VDDA
WMIX_LNP
RX_QP
RX_QN
RX_IP
GCELL_INP
RX_IN
GCELL_INN
SSBDT
WLNA_OUT
R111
C134
C143
C163
<RF SWITCH>
L102
L118
C116
C172
19
ANT
10
VDD
14
VC1
13
VC2
12
VC3
11
VC4
25
GSM850|900_TX
22
C130
GSM1800/1900_TX
C164
C132
G1G2
G3G4
G5
G6
G7
9
18 20
21
23
24
26 27
C111
C171
C112
C174
C141
L115
<GSM PAM>
19
18
17
G
G
NC
1
16
DCS/PCS_IN
DCS/PCS_OUT
2
15
BS
G
3 TX_EN
14
G
PAM100
4
13
VBATT
NC
5
12
CEXT
G
6
11
VRAMP
G
7 GSM_IN
GSM_OUT 10
NC
G
8
9
C173
C108
EGSM900_TX
VRFTX_2.65V
C110
C114
C115
C120
42
UMTS850_TX
DA_LB2_OUT
41
VDDA
40
PWR_DET
PWD_DET_IN
39
DCS_RXM
DCS_INN
38
DCS_RXP
DCS_INP
37
PCS_RXM
GPCS_INN
36
PCS_RXP
GPCS_INP
35
34
33
GSM_RXM
EGSM_INN
32
GSM_RXP
EGSM_INP
31
30
C169
29
R113
VSYNT_2.6V
C146
C145
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DUF100
L103
3
GSM1900_RX1
4
GSM1900_RX2
C121
L104
1
GSM1800_RX1
2
*
GSM1800_RX2
L105
5
GSM900_RX1
6
GSM900_RX2
7
GSM850_RX1
L106
1.5nH
8
GSM850_RX2
L107
15
L120
UMTS1
16
UMTS2
L108
1.5nH
17
UMTS3
G8G9
L109
27nH
28
L119
L111
L110
27nH
F101
C170
4
OUT
R114
G
DCS1800_PCS1900_TX
C168
R116
R115
GSM850/900 TX
GSM1800/1900 TX
GSM850 RX
GSM900 RX
GSM1800 RX
GSM1900 RX
UMTS 850 RX/TX
9-28
DAC_REF
TX_AGC_ADJ
R105
VRFRX2_2.65V
R124
PCS_RXM
PCS_RXP
DCS_RXM
RTR6275_TCXO
VRFRX2_2.65V
VSYNT_2.6V
DCS_RXP
C124
C125
GSM_RXM
L114
GSM_RXP
VRFRX2_2.65V
UMTS_ANT
VMSMP_2.6V
C166
R118
1
EGSM900_TX
IN
G
G
C167
R120
R119
5
3
2
MODE
ANT_SEL0
ANT_SEL1
ANT_SEL2
H
H
H
L
L
L
L
H
L
L
H
H
H
L
L
H
H
R104
C119
C126
C127
R125
L
L
L
H
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