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(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
(16)
(17)
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(21)
(22)
(23)
(24)
(25)
(26)
150
(27)
150
(28)
150
(29)
(30)
SP-MUTE
RLY
(31)
(32)
(33)
(34)
(35)
+5V
(36)
(37)
H/SMUTE
(38)
HOOK
(39)
(40)
(41)
R102
820
(42)
R103
820
(43)
(44)
(45)
(46)
(47)
R104
820
(48)
(49)
R134
(50)
470
EXHOOK
(51)
TP10
(52)
(53)
(54)
(55)
PAPER
(56)
BELL
(57)
(58)
(59)
(60)
(61)
(62)
R13
1K
R28
120K
P_SHORT
(63)
A[0-17]
IC2
A[17]
A[0]
12
13
D[0]
A[16]
A0
D0
11
14
A[1]
D[1]
A1
D1
A[15]
10
15
A[2]
D[2]
A[14]
A2
D2
A[3]
9
17
D[3]
A[13]
A3
D3
A[4]
8
18
D[4]
A[12]
A4
D4
7
19
A[5]
D[5]
A[11]
A5
D5
6
20
A[6]
D[6]
A[10]
A6
D6
5
21
A[7]
D[7]
A[9]
A7
D7
A[8]
27
A[8]
A8
26
A[9]
A[7]
A9
23
A[10]
+5V
A10
A[6]
25
A[11]
A[5]
A11
A[12]
4
31
A[4]
A12
PGM
A[13]
28
1
A[3]
A13
VPP
29
32
A[14]
A[2]
A14
VCC
3
A[15]
A[1]
A15
2
A[16]
A[0]
A16
A[17]
30
A17
22
CE
D[7]
24
16
OE
GND
D[6]
D[0]
D[5]
D[1]
D[4]
D[2]
D[3]
R34
1M
R30
0
24MHZ
X3
R26 330
R29
MOMRXENB
1M
20.736MHZ
MTXENB
X2
L1
+5V
+5V
APDMCK
/PD
9
8
APDMDT
DPDMDT
10
7
C3
DPDMCK
11
6
H/SRXENB
C4
MUTE
12
5
TELRXENB
C5
VSS1
13
4
C48
R37
VSS2
TXOUT
14
3
24K
+5V
K0.1
RXINA
VBIAS
15
2
RXINB
VDD
16
1
[4]
IC5
C43
K0.1
R33
1K
C27
K0.1
H/SRXENB
MOMRXENB
MTXENB
TELRXENB
+3.3V/BATT
D[0-7]
IC3
A[0]
10
11
D[0]
A0
D0
9
12
A[1]
D[1]
A1
D1
8
13
A[2]
D[2]
A2
D2
A[3]
7
15
D[3]
A3
D3
A[4]
6
16
D[4]
A4
D4
5
17
A[5]
D[5]
A5
D5
4
18
A[6]
D[6]
A6
D6
3
19
A[7]
D[7]
A7
D7
R14
A[8]
25
A8
24
A[9]
A9
21
28
A[10]
A10
VCC
23
A[11]
A11
A[13]
2
A12
A[14]
26
20
A13
CS
1
A[15]
A14
22
OE
14
27
GND
WE
+5V
+5VA
Vref
IC6
+5V
1
14
VDD
2
13
3
12
4
11
5
10
6
9
R39
7
8
VSS
75K
R38
C51
J220P
24K
+12V
6
C50
7
5
-2
IC8
K2200P
Vref
K1800P
C56
12K
R46
+12V
+24VA
C45
K0.1
R35
56K
2
8
1
3
4
IC8
-1
+5VA
FAX TX signal
FAX RX signal
+3.3V
+5V
Q2
Q3
Q4
J1
2.2K
R101
NC
R100
NC
+5V
Q1
Q11
C61
J150P
R53
+12V
100K
+24VA
C58
R49
2
8
1
68K
K0.1
3
IC9
4
-1
C59
R50
R51
C60
R131
6.8K
NC
NC
10K
K0.1
Q16
C63
R60
K0.1
5.6K
+12V
R59
390K
C64
J100P
10K
C62
6
7
K0.1
R57
5
IC9
-2
+5V
Vref
+5VA
DIGITAL BOARD SCHEMATIC DIAGRAM
+24V
+24VF
CN1
+5V
1 +24v
2 +24v
3 +24v
4 GND
5 GND
6 GND
7 +5V
8 PDET
TO POWER SUPPLY UNIT
+24VF
CN9
+5VA
+5V
R119
100
R120
1K
R112
100
R121
1K
10 LINERX
11 LINETX
R117
1K
12 HOOK
R113
1K
13 SPMUTE
R116
100
14 P_SHORT
C66
R62
15 H/STX
K0.1
39K
16 SPOUT
17 H/SRX
Q6
C65
K0.1
C67
K0.1
+24VA
+24VF
Q10
+12V
R89
10K
KX-F71LA-B
1 +24V
2 DG
3 +5VD
4 +5VA
5 AG
6 BELL
7 EXHOOK
8 RLY
9 PAPER
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