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Flow Chart of Troubleshooting
9-49

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87
VDDA4
10
VDDA5
15
VDDA6
23
VDDA7
26
27VDDA8
VDDA9
3143
VDDM
VTUNE_REF
39
VDDA12
41
VDDA1348
VDDA1450
VDDA1552
54
VDDA16
VDDA1756
5
VDDA2
VDDA3
42
UMTS1900_OUT53
UMTS2100_OUT51
UMTS800_OUT55
VCONTROL49
9
VCO_TUNE
VDDA1
4
36
VDDA10
VDDA11
45
SBST46
TCXO
6
TX_IN
19
TX_IP
18
40
TX_MOD_CP
TX_QN
17
16TX_QP
TX_VCO_FB
47
RX_IN
14
RX_IP
13
RX_QN
12
RX_QP
11
32
RX_VCO_IN
R_BIAS
33
44
SBCK
SBDT
24
GSM1900_INP
25
GSM850_INN
21
GSM850_INP
22
GSM900_INN
38
37
GSM900_INP
NC158
59
NC2
RF_ON
1
CP_HOLD2
29
DAC_REF
20
FAQ1
3
FAQ2
28
57
GND
GSM1800_INN
3435
GSM1800_INP
GSM1900_INN
U700
CP1
2
30
CP2
CP_HOLD1