Flow Chart of Troubleshooting
3-17
C323
VLDO1
6
1
VLDO2
9 VLDO3
C
F
A
V
VBAT
41
I
B
B_
C
C
V
4
Q
B
B
_
C
C
V
42
E
F
_
C
C
V
1
F
E
R
_
C
C
V
71
VCC_TXVCO
31
21
VDD
51
RX850B
03
RX900
92
RX900B
6
K
L
C
S
A
T
A
D
S
5
N
E
S
7
TXOP_HI
1
1
TXOP_LO
01
81
B
NI
F
E
R
91
1
2
P
O
_
F
E
R
82
RX1800
RX1800B
62
72
RX1900
RX1900B
52
23
RX850
13
2
I
3
BI
8
C
N
43
C
N
C
N
53
Q
32
B
Q
22
NI
F
E
R
02
U400
GND
33
VBAT
C313
R305
C318
2
GND1
GND2
4
HOT
1
3
HOT
VCCD_2.9V
OSC400
C307
C308
C324
C326
R304
C300
C321
R301
C306
C325
C359
VRF_2.9V
C301
C314
DPCS_PAM_IN
SERLE
SERDAT
SERCLK
GSM_LNA_IN_P
GSM_LNA_IN_N
DCS_LNA_IN_P
DCS_LNA_IN_N
26M_OUT
RTXQN
RTXQP
RTXIN
RTXIP
GSM_PAM_IN
AFC