User Guide

Flow Chart of Troubleshooting
3-17
C323
VLDO1
6
1
VLDO2
9
VLDO3
C
F
A
V
VBAT
4
1
I
B
B
_
C
C
V
4
Q
B
B
_
C
C
V
4
2
E
F
_
C
C
V
1
F
E
R
_
C
C
V
7
1
VCC_TXVCO
3
1
2
1
VDD
5
1
RX850B
0
3
RX900
9
2
RX900B
6
K
L
C
S
A
T
A
D
S
5
N
E
S
7
TXOP_HI
1
1
TXOP_LO
0
1
8
1
B
N
I
F
E
R
9
1
1
2
P
O
_
F
E
R
8
2
RX1800
RX1800B
6
2
7
2
RX1900
RX1900B
5
2
2
3
RX850
1
3
2
I
3
B
I
8
C
N
4
3
C
N
C
N
5
3
Q
3
2
B
Q
2
2
NI
F
E
R
0
2
U400
GND
3
3
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