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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.
+5V
RN105
10K
PE4
8 STMA
RN105
10K
PE5
9 STMB
I/O
(IC03)
16. Stapler unit
The stapler unit (EH-524S: Max Co., Ltd.) staples up to 50 sheets of
2
80g/m
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
97(H) × 80(W) × 104(L) mm
Outside dimensions
2
Stapling capacity
52 g/m
below 5 mm thick
Stapling type
Bypass flat clinch
Stapling speed
400 msec or below
Needle cartridge
5000 needles
R168
D08
200
1SS133
IC105
R167
1
16
1K
R165
D07
TD62503F
200
1SS133
IC105
R166
2
15
1K
TD62503F
C163
C164
10000P
10000P
+5V
R176
IC105
1K
3
14
TD62503F
IC105
4
13
TD62503F
C179
68000P
+5V
+10V
IC105
12
5
R153
2.2K
TD62503F
BA10393F
8
11
6
1
4
C178
TD62503F
0.1U
Specification
2
sheets ~ 80 g /m
50 sheets,
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.
Q04
Q02
500
500
3K
R22
2.4K(1/4W)
2SB1431
R23
2.4K(1/4W)
Q03
Q01
5K
150
150
R175
1K
2SD1590
2SD1590
C180
68000P
+5V
R152
3.9K
IC104
R138
3
+
100
2
-
C151
C152
R151
R7
0.1U
0.1U
1.2K
0.22
(1W)
Finisher
main PWB
9 – 12
F02
+24V
2.5A/125V
T1.6A/250V
3K
2SB1431
STM+
STM
STM-
D03 D04
1SR124-400 2
5K
STM
STHP
LSTS
NCTS
READY
+5V
GND
Stapler unit
AR-FN3
8/19/1999
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