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89
SCHEMATIC DIAGRAM
NX-900
1.67V
T : 0V
R : 3.3V
3.29V
3.29V
3.32V
1.67V
1.67V
1.67V
1.67V
1.67V
3.33V
(AI/TONE/MI1 MI2)
MM
MM2
VSS
R774
R773
TC75W51FK(F)
/(MOD/DI)
MOD SUM
1
2
3
4
VDD
IC709
6
0
100k
R801
C770
0.1u
R789
C783
0.1u
R797
330k
R806
5.6k
0.1u
C784
680k
R798
2
1
MI2
MI1
ME
C748
0.1u
AF DETECTOR
Q704,705
450K
22p
33A-2
SUM AMP
8
7
6
5
MIC SUM1
C764
470k
R779
C765
1u
0.1u
C750
C751
RB706F-40
C766
0.1u
1u
D705
RB706F-40
(LIMIT)
D704
270k
MUTE (MI2)
C787
10u
MUTE (MI1)
0.1u
10k
39k
0.1u
R804
680
R793
R786
C773
2SA1832(GR)F
Q705
C782
R796
0
10u
R812
4.7k
C793
100p
R816
100k
2SJ243-A
2SJ243-A
Q706
Q707
C795
C794
10u
R787
2SC4738(GR)F
R784
150k
LIMIT
Q704
C791
100p
R813
4.7k
R809
100k
R815
100k
/SCSW
D704,705
MOD
100k
0
R710
100k
C712
47p
R705
R850
C706
220p
R714
100k
MOD SMF
0.1u
C720
33A_2
SCSW(MIC)
AF SWITCH
(TXO/TXI)
1k
R765
R739
8
1
LPF (MOD)
VDD
7
2
R731
R745
100k
0
R741
100k
0
TC75W51FK(F)
6
5
3
4
VSS
IC702
TC7W53FK(F)
GND
CoMMoN
INH
VEE
3
4
2
1
R768
5
6
A
CH1
47k
7
8
CH0
VCC
R767
47k
0.1u
IC708
C744
0.1u
C707
VDD
VIN-
MCP6021-E/OT
MIC
0.01u
C710
0.01u
R717
C714
0.01u
C725
0.01u
R734
22k
10k
VoUT
VSS
VIN+
2
1
3
IC704
39k
R730
C732
R733
33k
BUFFER AMP
R726
10
5
4
(2nd IF DET)
33A_2
IF_DET
MIC AA
TC75W51FK(F)
100p
C715
1200p
LPF/SUM AMP
4
VSS
5
220p
R724
56k
C721
R722
68k
R725
68k
0
R716
3
2
6
C736
1
VDD
7
8
0
MIC SUM2
56k
R759
100k
0.1u
100k
82k
R748
R749
R753
C742
R766
C729
0.1u
IC706
33A_2
VREF
C763
TXO
0.1u
TXI
0.1u
C762
DTI
680k
470k
450k
ME
VREF
VREF
VREF
13
9
1
13
9
1
9
10
13
9
1
13
10
9
13
1
1
2
2
13
2
13
13
10
X57-806 (A/2) 6/14
AD
AC
AB
AA
Z
TX-RX UNIT (X57-8060-10) (A/2)
Summary of Contents for NEXEDGE NX-900
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