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92
NX-800/800H
SCHEMATIC DIAGRAM
X57-739 (A/2) 13/16
BI BJ BK BL BM
1.62V
3.28V
1.62V
1.62V
4.98V
3.28V
3.28V
1.62V
1.62V
3.28V
1.62V
R807
150k0.01u0.1u
63
LEVEL
SHIFT (TXD)
R805
R769
4.7k
C747
0.01u
R756
C746
C743
0.01u
R758
10k15k
R763
18k
0.01u
SIDE TONE MUTE
AF SW
(AI TONE OPT9/VREF)
VEE
GND
SSM3K15TE(F)
Q703
TONE SW
12k
R772
R771
100k
C753
0.01u
R782
15k
R785
10k
C769
C768
0.01u
R778
390k
4
C775
0.1u
R788
22k
0.01u
R791
560k
CH1
A
5
3.3k
R846
R792
1k
C785
0.1u
TC75S51FE(F)
C792 47p
oUT
VDD
R814
100k
C786
0.1u
R808
10k
82k
IC714
IN-
3
1
2
VSS
IN+
C798
0.1u
R819
0
C796
4
5
0.1u
15k 27k
R770
C745
0.01u
R764
120k
TC7W53FK(F)
SUM AMP
TC75W51FK(F)
INH
CoMMoN
56k
C749 C752
330k
R777
C767
0.1u
1
2
VREF
C754
1000p
100k
C761
0.01u
R781
2
3
4
100k
R780
R783
0
1
R794
IC710
CH0
VCC
8
7
R790
(AF) / VREF
R800
4.7k
R803
6
5
VSS
C779
C778
0.1u
IC711
8
7
VDD
VREF
R795
68p0
R802
R799
56k
RX SUM
DAC
VIN8
VoUT8
VoUT7
VIN7
GND
RESET
VDAREF
VIN6
VoUT6
VoUT5
VIN5
20
15
R836
0
14
13
C774
1000p
19
18
17
16
D0
24
23
22
21
5
10
IC712
M62364FP-F
11
12
VoUT4
VIN4
6
8
9
7
LD
DI
VIN3
CLK
VoUT3
C777
1000p
1u
2
3
1
4
VoUT1
VoUT2
VIN1
VDD
VIN2
R833 100
R834 100
R835 100
VCC CoMMoN
10k
AFO BEFF
AO SW
C788
0.1u
0.1u
4
2
1
3
VGS REC SEL
TC7W53FK(F)
CH0
CH1
A
5
7
8
6
IC713
INH
GND
VEE
R810
1k
C797
C813 10u
C790 10u
PROTECTION
LINE
(DI)
C789 4.7u
SW
OPT10
D707
EMZ6.8N
D706
EMZ6.8N
(DEO)
R822
100
R818
33k
R821
0
R820
470k
0.1u
2SA1832(GR)F
47k
Q708
R817
C799
R776
220k
220k
2
1
2
1
6
VREF
33A_2
TV1
TV2
C776
VCO_MOD
TCXO_MOD
MP
SDO0
SCK0
/EVCS
STSW
TONESW
BEEP
TONE
AFO
AI
OPT9
OPT10SEL
OPT6
AO
50C
PROTECTION
LINE
/INAMT
MI2
MI1
ME ME
MI1
MI2
AFO
VIN8
/INAMT
33A-2
50C
OPT10
DI
DEO
1 11
1
1
2 2
9 99
9
9
10
11 11
13 1313
TX-RX UNIT (X57-739X-XX) (A/2)