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Flow Chart of Troubleshooting
10-18
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C106
L100
C104
C110
C113
C101
C105
ANT_GND
C114
R102
RFS100
A
2
C
1
3
G
G
4
R100
GSM850_OUT1
GSM850_OUT2
9
21
N
C
N
C
22
N
C
23
1
PCS_IN
16
PCS_OUT1
15
PCS_OUT2
G
N
D
G
N
D
5
G
N
D
7
G
N
D
17
18
G
N
D
19
G
N
D
20
G
N
D
8
GSM850_IN
10
DCS_IN
4
1
3
DCS_OUT1
DCS_OUT2
13
6
EGSM_IN
EGSM_OUT1
12
11
EGSM_OUT2
G
N
D
2
4
ANT_F
F100
C109
C102
L102
C107
C112
V_BATT
C111
C108
L101
C130
C100
4
TX_EN
V
B
A
TT
30
2
VLOGIC
VRAMP
3
16
G
18
G
G
19
GSM_IN
27
RX1 11
12
RX2
RX3 13
14
RX4
G
33
34
G
G
35
36
G
8
G
G
9
10
G
G
15
G
23
24
G
G
25
26
G
28
G
G
31
32
G
G
7
A
N
T
17
BS1 5
6
BS2
29
DCS|PCS_IN
G
1
20
G
G
21
22
G
PAM100
GSM_LNA_IN_P
GSM_LNA_IN_N
DCS_LNA_IN_P
DCS_LNA_IN_N
PCS_LNA_IN_N
PCS_LNA_IN_P
GSM850_LNA_IN_P
GSM850_LNA_IN_N
BAND_SEL2
VAPC
TX_EN
GSM_PAM_IN
VMOD_EN
DPCS_PAM_IN
BAND_SEL1
ANT
SPK
SIM
GSM_RX
GSM_TX
DCS/PCS_RX
DCS/PCS_TX
FM_RADIO
MAIN MIC
EAR SPK
EAR MIC
POWER ON
CLK
RF GND
CUT FILL AREA
RF GND
L1
1
1
C
15
4
82
R116
VRF_2.9V
47PF
50V
C133
9 VLDO3
V
C
C
_B
B
I
4
V
C
C
_B
B
Q
24
V
C
C
_F
E
1
V
C
C
_R
E
F
17
VCC_TXVCO
1
2
13
VDD
15
VLDO1
16
VLDO2
29
RX900B
6
S
C
LK
S
D
A
TA
5
S
E
N
7
TXOP_HI
11
TXOP_LO
10
18
V
A
FC
VBAT
14
21
R
E
F_
O
P
28
RX1800
RX1800B
27
26
RX1900
RX1900B
25
32
RX850
31
RX850B
RX900
30
IB
8
N
C
34
N
C
N
C
35
Q
23
Q
B
22
R
E
FI
N
20
19
R
E
FI
N
B
RFT100
GND
33
I
2
3
C124
C129
C140
R
11
1
C
12
2
V_BATT
C137
R110
C136
C123
C128
C131
C116
R105
VCCD_2.9V
C125
L104
C127
2
4
3
1
OSC101
R123
51
C138
C139
C117
L108
C156
DPCS_PAM_IN
GSM850_LNA_IN_N
GSM850_LNA_IN_P
26M_BT
26MHZ_DBB
AFC
GSM_PAM_IN
PCS_LNA_IN_N
PCS_LNA_IN_P
RTX_I_P
RTX_I_N
RTX_Q_P
RTX_Q_N
DCS_LNA_IN_N
DCS_LNA_IN_P
GSM_LNA_IN_N
GSM_LNA_IN_P
SBCK
SBDT
SBLE