Specifications

III – 24
Main PCB Circuit Diagram 1/5
1 SW1, hook switch sensor (microswitch)
2 SW2, cover switch sensor (microswitch)
3 SW3, paper empty sensor (microswitch)
4 Reset IC which turns on at the powering-on sequence and at any of the reset opera-
tions.
5 Connector for the control panel
6 FAX engine (ASIC) which integrates a CPU, digital portion of a MODEM and gate array
for managing the I/Os, memories, and drivers.
7 XT2, oscillator which oscillates at 16 MHz for the CPU.
8 XT1, oscillator which oscillates at 32.768 kHz for the calendar clock.
9 XT3, oscillator which oscillates at 57.6 MHz for the MODEM.
: Connector for the cutter HP sensor
PI O1
SEON( OD)
SPSL( SMC)
CI
TLOF
HOOK
STD
CML
DPS
PLS
L NCR( COMP)
TEL
RST
SOL ( OD)
SEN2
SEN3
SEN4
SEN5
SEN6
SEN7
SEN8
EXTL
XTL
IORD
IOWE
PI O2
EI T 1
AVDD
CP1 I
CP3 I
CP4 I
CPNN
RDA6
REF H
REF L
AVDD
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
VDD
VDD
VDD
VDD
VDD
VDD
PI O5
E2CS
RDAT
TG
DI F
CL 1
CL 2
RB
RDA6 1
ST1
ST2
HDC
DI N
DOUT
RM1
CTX D
LI GT( PWM)
PI O6
PI O4( OD)
PI O3( SRAM)
P03 ( OD)
PCLK
SDOUT
RAS0
BARMRD
RMRD
RMWE
ROMC
CRXD
CKS
TXD
RXD
CTS
PWON
RTCCON
RVDD
DMT
DMK
ADMD
AAMD
C0
C1
C2
AMUT
D0
D1
D2
D3
D4
D5
D6
D7
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
#8
T7D60
44
143
141
70
72
124
123
122
177
176
175
121
184
166
167
183
88
193
194
192
195
187
188
189
57
191
80
107
82
83
18
17
208
23
20
204
26
203
103
69
41
108
186
92
91
94
90
102
104
101
98
95
100
52
182
51
56
55
54
53
50
49
48
58
15
38
60
81
96
105
119
142
10
43
97
114
132
201
127
128
129
130
131
133
134
135
13
12
11
16
14
6
5
136
137
138
139
148
149
150
151
152
153
154
155
157
158
159
160
161
162
163
45
46
169
171
170
168
172
173
174
125
126
145
146
140
144
64
61
202
199
196
197
198
ABUS 26B, 34D
MOD EMT B US
48A, 58D
GND
GND
+5
AMUTE
DA1
DA2
DA3
DA4
DA5
DA6
DA7
DA8
DA9
D0 0
D0 1
D0 2
D0 3
D0 4
D0 5
D0 6
D0 7
TSTB
INT
BSRQ
BSAK
NMI
WA I T
RFS H
M1
IORQ
MRE Q
RD
WR
CK1 6
CK8 M
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
MA 1 6
MA 1 7
MA 1 8
TSTA
RVDD
46D RNGL
33C CLAMP
34C, 32A TG
32E ST1
32E ST2
33A LI GT
+E5
47E VOL3
33D CP3I
43A TELL
15B PCLK
42F TLOF2
12B COVER
42F EAT
42D OTO
53B CLSEL
25B LON
SPON
40
E1CS
106
42F CI
42F TLOF
XT2
CST16. 00MX
XT1
32. 768kHz
CL CI
ODP I O0
ODP I O1
ODP I O2
FCS2
178
179
180
37
RSTL 14A
CL RST
CL CK
CL TXS
23F SOL RM3
28
RM4
29
39
RI NG
R5 2
0
C4 0
104
C4 2
12P
(R82
NO PA TT RN)
(R85
PATTRN
SHORT)
L15
MMZR601A
C5 7
104
C6 2
104
C4 5
104
C5 3
104
89
PO1
VDD
147
VDD
165
47
AGND VSS
156
PO2
MONMDCK
MI O3
MI O1 1
MVSS
DA0
C1
C2
AAPDMD
ADPDMD
DPDMCK
DPDMDT
MI O0 ( P WM)
MI O1 ( P WM)
185
76
77
78
79
30
31
32
109
110
111
112
113
115
116
117
118
120
C3 0
104
C3 6
104
PANEL
P6
B5B- PH
WH I T E
GND GND
5
1
3
2
4
R95 470
C7 6
101
C7 4
104
#8
T7D60
E0V
C0
REXT
4
62
DABUS
26B, 26E
DA0
DA4
DA5
DA6
DA7
DA8
DA9
207
GND
XT3
57. 6MHz
R5 0
220
C4 3
5P
C4 3
5P
MT XL
206
MEXT L
GND
P5
NC
+5B
GND
Q6
RH5 VA4 3
VCC
OUT
GND
RSTL 16A, 36D,47B, 14B, 57E
DA3
DA2
DA1
R5 1
100
C117
104
C3 9
104
93
DBUS 25E, 36D
+5M
R143
R140
PBUS
17B
C5 1
104
R9 7
NC
+5
GND
43B TADH
43E PLS
C3 5
101
12B PE
GND
33C CLPWM
38E PWON
15B SDI N
36C RDAT
27
RM2
R101 470
C8 4
101
C8 2
102B
42F DAST
34C SMC
RXT
63
4 3D DAREC
R34 10K
19
MI O2 ( P WM)
36B REAR
52C CLBSY
17C HOOK
R6 3 NC
R69 10K
25D RAS0
BARMRD
+5
36D SEON
42E RDPS
CMLH
+5
L13
MMZR601A
CRXD
CKS
TXD
RXD
CTS
E5V
E0V
R3 9
75F
C3 2
104
R4 9
75F
R4 6
100F
CRXD
CTS
RXD
TXD
CKS
+5
GND
*P13
87180- X88
2
3
PCI
4
7
5
16B PBUS
1
8
6
32E HDC
32A RB
34 C SRAM
54A CTSEL
C7 9
101
164
200
VSS
VDD
190
AGND
59
C5
3
2
1
C4
C3
C5
C4
C3
42F RSTL
46E VOL1
15B SDOT
12B SDI N
12B PCLK
12B SDOUT
APDMDT
APDMCK
AMK
AMT
9
8
MUT E
7
MUT
R141
99
CL B
42F DASNO
R96 10K
22
MI O5
24
MI O1 2
GND
21
MI O4
46E SPON
45D HAFH
44D TXSL
37C FRNT
5 2D CLRX S
SDI N
14A RSTL
73
BAENB
66
CK3 2
68
BAKCLK
74
BAVDD
65
BAKSEL
25
MI O1 3
205
MV DD
+5
+5
MM3
SBUS 3 4D
MM2
MM1
MM2
MM3
MM4
84
85
86
87
WR
MM4
MX 0 V
TC74VHCU04FS
#9
4117
14
C3 8
104
+5
35
#9 TC74VHCU04FS
138912
R4 7 4. 7K
ODP I O3
181
ODP I O4
42
FDCL K
33
FDOUT
34
FDI N
35
FCS1
36
67
CK32ON
42F ADLC
E0V
R4 5
10K
C3 3
104
R6 0
22K
*R78 NC
R6 5 NC
VOL2 46E
MM1
IORQ
CK1 6
RD
MBUS 23C
MRE Q
R9 2
200
25B EPDO
C3 4
104
3 2E DOUT
34C E1CS
32E DI N
+5
GND
R144 10K
R142
+5
C4 9
104
+5V
R55 100
GND
C5 0
102B
+5B
45E RNGO
C3 7
104
C4 8
NC
GND
R6 6 NC
L16
300
2
1
3
R5 3
1. 5K
1
3
2
RA2
RA2
RA3
RA3
RA2
RA2
RA3
RA3
200( X4)
200( X4)
R146 200
R145 200
200
200
100
100
75
CAS25D CAS
71
BARMWEBARMWE
RA1
RA1
RA1
RA1
200( X4)
R139 100
RMRD
ROMC
R94 100K
R7 4 0
MX 0 V
EPCLK
* L11
*L7
* L10
*L5
*L2
*L9
*L6
*L8
+5
C118
NC
GND
+26V
R3 8
75K
+5
R102
1K
*C67
NC
GND
1
2
P12
B2B- PH
WH I T E
CUTTER
L4
N. C
GND F G
4
1
3
2
1
4
2
3
1
4
2
3
R103
4. 7K
R9
4. 7K
R2 7
4. 7K
+5
GND
SW3
SW2
SW1
SW- 162x3
16C HOOK
13D COVER
13D PE
*C80
0
+E5+5 +E5+5
GND
E0V
0
X8
GND
GND
+5
L20
0
*C27
0
33B VI D
L3
0
GND
C4 7
10P
1
12345678
21 345678
A
B
C
D
E
F
A
B
C
D
E
F
Not mounted.
1
2
3
5
4
7
8
6
9
:
FAX-270MC/290MC/520DT/520MC/MFC370MC/390MC