Tray-Up Motor Drive Circuit - Toshiba DP1600 Service Manual

9.6 Tray-up Motor Drive Circuit

Tray-up motor : Driven by IC4 (PWA-F-RLY : TA8428K)
The block diagram of TA8428K is shown below.
Overheat
protection
circuit
Overcurrent
protection
circuit
Control logic
1
IN1
IN1 and IN2 are input terminals for the signals from the I/O port GA-1. In the control section, the motor is
controlled (ON and OFF) based on the signals from the I/O port GA-1. For the control, refer to the table
below.
IN1
December 2000 © TOSHIBA TEC
2 3
IN2 M(+)
Input
IN2 M (+)
H H
L H
H L
L L OFF (high impedance) STOP
4 5
GND M(–)
Output
Description
M (-)
L L BRAKE
L H CCW (upward)
H L CW (downward)
9 - 9 1600/2000/2500 PAPER FEEDING SYSTEM
6 7
N.C. V
CC