Toshiba e-STUDIO350 - Drive Circuit of Tray-Up Motor

November 2003 © TOSHIBA TEC 9 - 9 e-STUDIO350/450 PAPER FEEDING SYSTEM
9
9.3 Drive Circuit of Tray-up Motor
The tray-up motor (T-UP-MTR) is driven by the LGC board IC1 (LGC: TA8428). The block diagram of
TA8428 is shown below.
IN1 and IN2 are input terminals to receive the signals from the tray-up motor. The control logic based on
the signals from the tray-up motor, controls ON/OFF of the rotation direction.
IN1
H
L
H
L
IN2
H
H
L
L
M (+)
L
L
H
OFF
(high
impedance)
M (–)
L
H
L
State
Brake
CCW
CW
Stop
Input Output
Fig. 9-301
1 2 3 4 5 6 7
IN1 IN2 M(+) GND M(-) N.C. VCC
Thermal shutdown
over-current
protection circuit
Control logic