10. Pusher, reversion, staple unit moving
motor drive circuit
The pusher motor control signal (PMA, A/, B, B/), reversion motor
control signal (RMA, A/, B, B/) and staple unit movement motor con-
trol signal (STUMA, A/, B, B/) from the CPU (IC3) are inputted to the
stepping motor driver IC SLA7024M (IC4, 8, 10), to drive the following
motors: the pusher motor which elevates the paper inside the staple
tray to the stapling position and paper discharge position; the rever-
sion motor which reverses the paper; and the staple unit moving
motor which moves the staple unit to the stapling position.
The driving method is a unipolar, 2-phase (pusher and tray 3 paper
discharge motor), 1-2 phase (staple unit motor), constant-current
chopper driving method.
•
Push motor drive pattern
•
Tray 3 paper discharge motor drive pattern
•
Staple unit moving motor drive pattern
PMA
PMB
PMA/
PMB/
Up
Stop
Energized
Down
Tray 3 paper discharge
direction
Stop
T3OMA
T3OMB
T3OMA/
T3OMB/
STUMA
STUMB
STUMA/
STUMB/
Front direction
Stop
Rear direction
Pusher motor drive circuit
Staple unit moving motor drive circuit
Tray 3 paper discharge motor drive circuit
CPU
PB0
PB3
(IC03)
2
5
4
3
PB2
PB1
T30MA
T30MA/
T3M0B
T3M0B/
3
14
10
6
REFA
5
16
17
REFB
RSB
IN A
IN/A
IN B
IN/B
IC08
SLA7024MT
OUT A
OUT/A
OUT B
OUT/B
GA
GB
VSA
7
1
8
11
18
4
15
T30MA
T30MA/
T30MB
T30MB/
+24V
12
VSB
2
9
13
TDA
TDB
RSA
R146
47K
C139
470P
C135
470P
+5V
C07 47U/35V
T30M
+24V
+24V
R141
47K
C137
2200P
R10
1(1W)
R142
2.4K
R11
1(1W)
R144
2.4K
C138
2200P
R143
0.1U
C136
60
R145
910
+5V
PB4
PB7
58
9
8
7
PB6
PB5
PMA
PMA/
PMB
PMB/
3
14
10
6
REFA
5
16
17
REFB
RSB
IN A
IN/A
IN B
IN/B
IC04
SLA7024MT
OUT A
OUT/A
OUT B
OUT/B
GA
GB
VSA
7
1
8
11
18
4
15
PSMA
PSMA/
PSMB
PSMB/
+24V
12
VSB
2
9
13
TDA
TDB
RSA
R121
47K
C126
470P
C122
470P
+5V
C05 47U/35V
PSM
+24V
+24V
R116
47K
C124
2200P
R5
1(2W)
R118
2.4K
R6
1(2W)
R120
2.4K
C125
2200P
R119
0.1U
C123
200
R117
910
+5V
IC102
TD62504F
12
5
P40
P43
18
21
20
19
P42
P41
STUMA
STUMA/
STUMB
STUMB/
3
14
10
6
REFA
5
16
17
REFB
RSB
IN A
IN/A
IN B
IN/B
IC10
SLA7024MT
OUT A
OUT/A
OUT B
OUT/B
GA
GB
VSA
7
1
8
11
18
4
15
STUMA
STUMA/
STUMB
STUMB/
+24V
12
VSB
2
9
13
TDA
TDB
RSA
R159
47K
C158
470P
C154
470P
+5V
C06 47U/35V
STUM
+24V
+24V
R154
47K
C156
2200P
R19
1(1W)
R155
2.4K
R20
1(1W)
R157
2.4K
C157
2200P
R156
0.1U
C155
160
R158
910
+5V
6
P60
PMPD
R131
200
IC102
TD62504F
10
7
60
P62
R140
270
T3MPD
AR-FN3
8/19/1999
9 – 9
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