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Flow Chart of Troubleshooting and Circuit Diagrams
3-32
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OSC_2.85V
RFTX_2.85V
C631
R602
C607
C620
C608
C615
C613
30
6
R
L605
L603
L604
R617
R613
C626
C623
RFTX_2.85V
RFTX_2.85V
R604
C611
C619
C627
R616
C621
L600
R610
C602
R601
C600
C601
31
9
A
D
D
V
43
M
D
D
V
8
F
E
R
_
E
N
U
T
V
L602
56
VDDA17
5
2
A
D
D
V
7
3
A
D
D
V
10
4
A
D
D
V
15
5
A
D
D
V
23
VDDA6
26
VDDA7
27
VDDA8
4
1
A
D
D
V
36
0
1
A
D
D
V
39
1
1
A
D
D
V
41
2
1
A
D
D
V
48
VDDA13
50
VDDA14
52
VDDA15
54
VDDA16
17
TX_QN
16
TX_QP
42
B
F_
O
C
V_
X
T
53
UMTS1900_OUT
51
UMTS2100_OUT
55
UMTS800_OUT
49
VCONTROL
9
E
N
U
T_
O
C
V
33
S
AI
B_
R
44
SBCK
45
SBDT
46
SBST
6
O
X
C
T
19
TX_IN
18
TX_IP
40
P
C_
D
O
M_
X
T
58
NC1
59
NC2
47
RF_ON
14
NI
_
X
R
13
PI
_
X
R
12
N
Q_
X
R
11
P
Q_
X
R
32
NI
_
O
C
V
_
X
R
34
N
NI
_0
08
1
M
S
G
35
P
NI
_0
08
1
M
S
G
24
GSM1900_INN
25
GSM1900_INP
21
GSM850_INN
22
GSM850_INP
38
N
NI
_0
09
M
S
G
37
P
NI
_0
09
M
S
G
2
1
P
C
30
2
P
C
1
1
D
L
O
H_
P
C
29
2
D
L
O
H_
P
C
20
DAC_REF
3
1
Q
A
F
28
FAQ2
57
GND
U600
R620
C634
R600
C609
C612
OSC_2.85V
C610
C614
C603
C630
RFTX_2.85V
MSMP_2.6V
O
X
C
T
TX_AGC_ADJ
UMTS_TXRF
UMTS_RX_VCO_IN
PI
_
X
R
M
Q_
X
R
P
Q_
X
R
TX_IM
TX_IP
TX_QM
TX_QP
N
X
R_
S
C
D
P
X
R_
S
C
D
N
X
R
_
M
S
G
P
X
R
_
M
S
G
PCS_RXP
PCS_RXN
P
C_
D
O
M
O
C
V
X
T
DAC_REF
E
N
U
T_
O
C
V
SBCK
SBDT
SBST
RF_ON_TX_ON
MI
_
X
R
VCO_TUNE
UMTS_RX_TUNE