Appendix
Schematic diagram
Appendix Contents
Power supply/motor driver board circuit diagram.....................................................................................A-3
Controller board circuit diagram ............................................................................................................... A-4
Controller board interface to options ........................................................................................................ A-5
Power supply/motor driver board circuit diagram
Feed
motor
2
1
J8
C8
Q5
2SD1193
C6
0.1
R10
D7
R11
470
IC3
0.1
2k
LB1650
Q6
2SC1815
16151413121110
IN4
Vcc2
INH1
IN1
1234567
*R12D8
*R13
8.2k
GND
OUT4
OUT1
GND
GND
GND
R9
R14
*R15
4.7k
*R16
4.7k
IN3
OUT3
OUT2
IN2
5 (5W)
2k
9
INH2
Vcc1
8
*Q8
2SC1815
*Q7
2SC1815
+24V
R1
D1
*: Not installed
R2
C1
6800
+
0.3 (5W)
+
RS602
~
F2
T3A 250V
T3.15A 250V
2.2k (2W)
35V
-
~
IC1
D2
+5V
OUT
7805
IN
RS102
F3
C4
C3
470
+
C2
2200
+
+
~
1.6A 125V
0.1
16V
GND
25V
-
~
T1.6A 250V
141212111098
C5
0.1
IC2
74LS04
1234567
RA
4.7k x3
GND
Vcc
GND
+24V
123456789
J1
Controller
SPEED1
board
FEEDON
SPEED2
J10
+24V
+24V
1
2
switch
Interlock
J16
TJ1
(TJ1)
GND
+5VOP
1
2
Remote
F1
J12
T1.6A 250V
T0.8A 250V
5
1
6
4
HOT
1
2
COOL
345
AC input
Transformer
23456789
1
J11
TJ2
2
3
(TJ2)
A-3
ST-20
Controller board circuit diagram
board
driver
motor
suplly/
Power
J1
7
FEEDON
5
6
SPEED1
SPEED2
4
GND
1
2
3
Vcc
GND
+24V
J2
Indicator
2
3
READY
POWER
panel
1
Vcc
Duplexer
J3
3
solenoid
selection
1
2
+24V
DPSON
full sensor
Paper tray
J4
8
9
GND
R4
R3
22k
NSIN
22k
exit sensor
Paper tray
1
2
3
4
5
6
7
Va
GND
Va
STX
SRX
GND
NSBF
330
P51
P32
330
IC2 (2/2)
35
8
P52
74LS07
34
P53
P30
9
D1
R5
Q1
*D10
0.1
C4
28
29
30
31
32
33
10
P71
P70
P63
P62
P61
P00
SCK
SO
SI
P80
P81
11
15
14
13
12
4.7k
2SC1815
9
11
10
12
13
14
15
16
1
27
16
I3
I4
O3
O4
COM
O1
Vcc
3
2
25
26
P72
P12
18
17
Vcc
GND
GND
Vcc
O2
I2
GND
GND
I1
8
7
6
5
4
22
23
24
P23
P22
P21
P20
P11
19
C2
0.1
VDD
NC
P10
21
20
R9
180
R7
4.7k
R6
4.7k
8
9
11
10
12
13
14
C5
0.1
7
6
5
4
3
2
1
16
17
18
19
20
O3
O2
O1
COM
IC7
TD62383
I3
I2
I1
Vcc2
5
4
3
2
1
IC4
O4
I4
15
6
R8
R18
74HC14
14
O5
I6
I5
7
Q3
1k
2SB927
1k
*: Not installed
11
12
13
O8
O7
O6
Vcc1
0.1
C60
GND
I8
I7
9
8
10
+
C1
4.7/50V
*Q4
*R20
*R19
14
C3
0.1
2
1
4.7k x8
RA (1/2)
42
VSS
IC1
µPD75004
1
3
41
2
X1
4
40
P41
P40
RES
3
4.19MHz
R1
R3
7
6
5
36
37
38
39
P50
P43
P42
P33
X2
X1
7
6
5
4
ST-20
R12
M51943A
IC5
DS1
8
9
10
11
12
13
14
0.1
C7
5
4.
3
2
1
4.7k x8
RA (2/2)
180
R11
GND
SOIN
Va
4
3
2
1
J5
Inlet
sensor
74HC14
IC6
7
6
2
1
Q2
2SA1015
10k
R16
R15
2.2k
R14
GND
+5VOP
2
1
J6
Remote
4.7k
R13
4.7k
8
9
11
10
12
13
14
74LS07
IC2 (2/2)
R17
4.7k
2.2k
D4
7
D5
D6
RB
1.5k x5
D7
D8
D9
SEl1
SEL0
READY
+5VOP
SCKD
+24VOP
6
5
4
3
2
1
J7
CA
100p x5
D2
D3
1µ
C10
1µ
C9
GND
SOD
SID
SEL
9
8
7
10
Option
A-4
Controller board interface to options
AC
AC
LS07
LS07
TD62383
TD62383
TD62383
TD62383
LS07
AC
+24V+24V+24V
+5 V B
+5 V A
+5 V A
1.5k
2.7k
1.5k
+5 V B
100p
+5 V A
+5 V A
1.5k
µPD75004
100p
1.5k
M66008
2.7k
M66008
+5 V B
1.5k
100p
100p
+5 V A
+5 V A
+5 V B
100p
µPD75004
+5 V A
1.5k
M66008
2.7k2.7k
+5 V A
M66008
1.5k
µPD75004
100p
1.5k
HC138HC138
2.7k
+5 V B
1.5k
100p
100p
+5 V A
+5 V A
100p
µPD75004
1.5k
HC138
2.7k
HC138
100p
+5 V A
µPD75004
HC138
HC138
HC01
µPD75004
+5 V A
+5 V A
M6608 M6608
+5 V A
+5 V A
4.7k
MB62299
READY*
+5 V A
4.7k
LS367
SID
Printer PF-20/PF-21 PF-20/PF-21 DU-20/DU-21 ST-20
2.7k
2.7k
+5 V A
+5 V A
+24 V A
+5 V A
LS07
LS07
SOD
SCKD*
LS07
+5 V A
SEL2
2.7k
LS07
SEL1
2.7k
+5 V A
+5 V A
LS07
SEL0
ST-20
A-5
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