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11. Elevator motor drive circuit
The elevator motor control signal (EMA, B) from the expansion I/O is
inputted through the driver TD62503F (IC103) to the H driver
STA457C (IC5), to drive the elevator motor which adjusts the tray
height according to the paper volume stored in the off-set tray (tray
3). EMA,B signal logic controls the rotational direction of the motor
(CW/CCW) to move up and down the tray.
The motor is braked to improve the stopping accuracy of the tray.
+5V
RN105
10K
4 EMA
PE0
RN105
10K
5 EMB
PE1
I/O
(IC11)
EMB
EMA
0
0
0
1
1
0
1
1
12. Off-set motor drive circuit
The off-set motor control signal (OFMA,B) from the CPU is input to
the H driver TA7291S (IC2), to drive the off-set motor which moves
the tray sideways against the paper discharge direction, in order to
sort the sheets discharged to the off-set tray (tray 3) by the number of
sheets specified.
P44
P45
CPU
(IC03)
OFMB
OFMA
0
0
0
1
1
0
1
1
R150
D06
200
1SS133
R149
1
1K
R147
D05
TD62503F
1SS133
200
R148
2
1K
TD62503F
C149
C150
10000P
10000P
IC103
3
14
TD62503F
IC103
4
13
TD62503F
Rotational
Working direction
direction
Brake
Brake
CW
Elevation
CCW
Descent
Stop
Stop
+5V
23 OFMA
24 OFMB
R128
R127
47K
47K
Rotational
Working direction
direction
Stop
Stop
CCW
Not used
CW
Off-set operation
Brake
Brake
TD62503 (IC103) is a driver for driving STA457C, consists of
peripheral resistors, capacitors, and diodes, which forms a delay cir-
cuit to prevent short electric current from flowing inside the H driver
when EMA and B are changed over.
To protect the circuit from shorting and motor locking, a protective
fuse (F3) is installed.
F03
1.15A/125V
T1.0A/250V
2
7
2
7
IC103
3
R13
3
1
16
1
8
2.4K(1/4W)
8
IC5
4
IC103
4
R14
6
15
9
6
9
2.4K(1/4W)
5
10
STA457C
5
10
+5V
R161
1K
R160
1K
C160
C159
68000P
68000P
The rotational direction of the motor is crank controlled in one direc-
tion (CW) and braked to a stop at the off-set home position.
To protect the circuit from shorting and motor locking, a protective
fuse (F1) is installed.
+24V3
F01
0.315A/125V
T0.2A/250V
IC02
C03
2
6
Vcc
VS
10U/35V
9
8
IN1
VREF
1
7
IN2
OUT1
5
3
GND
OUT2
TA7291S
9 – 10
+24V3
EVM+
EVM
EVM-
D02 D01
1SR124-400 2
OFM+
OFM
OFM-
AR-FN3
8/19/1999
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