15. Stapler motor drive circuit
The control signal (STMA,B) from the expansion I/O expansion is
inputted through the driver TD62503F to the H driver circuit which
consists of a large-current driving transistors Q1
∼
4, thus driving the
staple motor which staples sheets.
The rotational direction (CW, CCW) of the staple motor is controlled
by signal logics STMA, STMB. The motor is braked to a stop at the
home position.
TD62503 (IC105) is a driver to drive Q1
∼
4. A delay circuit is com-
posed of peripheral resistors, capacitors, and diodes to prevent short
current from flowing into the H driver circuit which is formed by Q1
∼
4, when STMA and STMB are changed over.
The staple motor has a large rush current. It thus has a current limit
circuit consisting of a voltage comparator BA10393F (IC104) and
peripheral resistances and capacitors, to apply current limit at about
5.3A. To prevent the circuit from shorting or motor locking, a protec-
tive fuse (F2) is installed.
16. Stapler unit
The stapler unit (EH-524S: Max Co., Ltd.) staples up to 50 sheets of
80g/m
2
paper. The unit consists of a driving DC motor (STM), home
position sensor (STHP), non-needle sensor (LSTS), cartridge sensor
(NCTS), and self-priming sensor which detects the stapling position of
needles (READY).
Item
Specification
Outside dimensions
97(H)
×
80(W)
×
104(L) mm
Stapling capacity
52 g/m
2
sheets ~ 80 g /m
2
50 sheets,
below 5 mm thick
Stapling type
Bypass flat clinch
Stapling speed
400 msec or below
Needle cartridge
5000 needles
500
3K
2SB1431
Q04
150
5K
2SD1590
Q03
2.5A/125V
T1.6A/250V
F02
+24V
I/O
PE4
PE5
8 STMA
9 STMB
+5V
R168
R167
R165
R166
D08
D07
RN105
10K
10K
200
200
1K
1K
1SS133
1SS133
(IC03)
TD62503F
TD62503F
3
14
4
13
IC105
IC105
R176
C179
68000P
1K
IC105
IC105
TD62503F
TD62503F
15
2
1
16
R22
R23
2.4K(1/4W)
2.4K(1/4W)
R175
C180
68000P
C163
10000P
C164
10000P
500
3K
2SB1431
Q02
150
5K
2SD1590
Q01
D03 D04
STM+
STM-
STM
1SR124-400
2
1K
+5V
R138
+
-
100
C151
0.1U
C152
0.1U
R151
1.2K
R7
0.22
(1W)
R152
3.9K
+5V
+10V
+5V
R153
2.2K
BA10393F
C178
0.1U
8
1
3
2
4
IC104
5
12
11
6
TD62503F
TD62503F
IC105
RN105
STHP
STM
LSTS
NCTS
READY
+5V
GND
Finisher
main PWB
Stapler unit
AR-FN3
9 – 12
8/19/1999
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