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C601
C604
F600
6
ANT
PCS_RX1 9
4
8
VC1
PCS_RX2
GSM_TX_EN
2
DCS_RX1 11
DCS_TX_EN
VC2
10
DCS_RX2
3
EGSM_RX1 13
GSM_OUT
EGSM_TX
1
12
DPCS_OUT
EGSM_RX2
DCS/PCS_TX
G
G
G
5
7
14
C612
C613
PAC_EN
C620
DCS74137_OUT
BAND_SEL
R611
VPC
C622
GSM74137_OUT
SAT_DET
R616
R617
C619
U600
1
NC
2
A
3 GND
R614
ANT601
RFS601
1
1
2
2
3
3
4
GND
C
A
GND
4
5
4
3
2
1
5
6
6
C602
L600
L601
C603
ANT602
1
1
2
2
3
3
4
4
5
5
6
6
ground
L602
C609
L603
U607
C611
L605
L606
C614
L607
VBAT
PAM600
1
ENA
2 DCS|PCS_IN
3 BS
DCS|PCS_OUT 14
4
VSUP
5 VBATT
6 VPC
7
GSMIN
8 RSVD
C628
C629
C630
C631
CLK13M_OUT
VRF_2.9
6
VCC
5
NC
4
Y
C626
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VBAT
ANT
GSM74137_OUT
DCS74137_OUT
R601
1
VCC1
TX_EN
2
TXENA
3
VPC
VPC
4
850LNA_N
5
UCD600
850LNA_P
6
900LNA_N
7
900LNA_P
8
1800LNA_N
9
1800LNA_P
10
1900LNA_N
11
1900LNA_P
RX_EN
TX_FB
VAPC
R605
C616
C617
C618
COUP_OUT 16
R607
GND 15
R608
R609
13
GND
12
GSM_OUT
11
GND
GND 10
GND 9
GND
17
R610
C621
C623
R615
C627
3-31
Flow Chart of Troubleshooting
RTX_QP
RTX_QN
RTX_IN
RTX_IP
VRF_2.9
MOD_SEL
C605
C606
31
C607
C608
NC
30
NC
29
NC
28
NC
27
XOENA
CHIPENA
26
SX_EN
SXENA
25
CLK
SERCLK
24
SERLE
LATCHENABLE
23
SERDAT
DATAIN
22
VCC2
21
XTAL
R603
C610
R604
SAT_DET
AFC
CLK13M_OUT
C615
R606
TX_FB
R612
R613
C624
C625
CLK13M_TR
CLK13M_MC
CLK13M_WM
OSC600
4
1
3
2
R602
DPCS_OUT
GSM_OUT
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Table of Contents
Troubleshooting
