Drive Circuit Of Tray-Up Motor - Toshiba e-STUDIO350 Service Manual

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.
Thermal shutdown
over-current
protection circuit
Control logic
1
IN1
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
November 2003 © TOSHIBA TEC
2 3
IN2 M(+) GND
Fig. 9-301
Input
IN2 M (+)
H H
L H
H L
OFF
L L (high
impedance)
9 - 9
4 5 6
M(-) N.C.
Output
State
M (–)
L L Brake
L H CCW
H L CW
Stop
e-STUDIO350/450 PAPER FEEDING SYSTEM
7
VCC
9