Read Sharp AR-651 (serv.man12) Service Manual online
AR-651/810 PAPER FEEDING SECTION 9 - 10
9. 4. Drive Circuit for Tray-up Motor
Cassette tray-up motor (MOT)
: Driven by IC72 (tray-up motor 1) and IC36 (tray-up motor 2)
(LGC: TA8428)
Block diagram of TA8428
1
2
3
4
5
6
7
IN1
IN2
M(+)
GND
M(–)
N.C.
V
CC
IN1 and IN2 are input terminals to receive the signals from the microcomputer. The control logic, based on
the signals from the microcomputer, controls the rotation direction and ON/OFF of the motor.
Input
Output
IN1
IN2
M (+)
M (–)
Remarks
H
H
L
L
BRAKE
L
H
L
H
CW
H
L
H
L
CCW
L
L
OFF (high impedance) STOP
Control logic
Thermal shut-
down over-
current protec-
tion circuit
down over-
current protec-
tion circuit
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