Drum Switching Motor Control Circuit - Toshiba e-STUDIO2500c Service Manual

11.4.4

Drum switching motor control circuit

The drum switching motor is a DC brush motor driven by the control signal output from the ASIC on the
LGC board and moves the guide to engage/disengage the gear which transmits the driving force of the
drum motor.
The motor driver outputs the drive signal (CKMMA-0A, CKMMB-1A) to the motor based on the control
signal (CKMMA-0C, CKMMB-1C) output from the ASIC. The motor operates the rotation, stop or brake
according to the status of these drive signals.
LGC board
CKMMA-0C
IC56
ASIC
CKMMB-1C
Control signal
ASIC output
CKMMA-0C CKMMB-1C
L
L
H
H
* CW: Clockwise rotation, CCW: Counter clockwise rotation viewing from the axis
May 2006 © TOSHIBA TEC
+24VD3
IC49
IC10
Motor driver
PG
Fig. 11-6
Signal
Motor driver output
CKMMA-0A
L OFF (high impedance)
H L
L H
H H
11 - 9
F4
CKMMA-0A
CKMMB-1A
CKMMB-1A
Stop
H CW (Gear engaged)
L CCW (Gear disengaged)
H Brake
e-STUDIO2500c/3500c/3510c PROCESS UNIT RELATED SECTION
Drum switching
motor
Motor status
11