Drum Motor Control Circuit - Toshiba e-STUDIO2500c Service Manual

11.4.3

Drum motor control circuit

The drum motor is a stepping motor driven by the control signal output from the ASIC on the LGC board
and rotates the drum.
The drum motor is driven by the pulse signal (DRMA, DRMB, DRMC, DRMD) output from the motor
driver. These pulse signals are formed based on the reference clock (DMCK) and output only when the
enable signal (DMEN) is a high level. Also, the rotation speed or direction of the motor can be switched
by changing the output timing of each pulse signal.
LGC board
DMCK
DMEN
IC41
DMDIR
ASIC
DMRST
Control signal
Signal
DMCK Reference clock
DMEN Enable signal
DMDIR Rotation direction signal
DMRST Reset signal
* CW: Clockwise rotation, CCW: Counter clockwise rotation viewing from the axis
e-STUDIO2500c/3500c/3510c PROCESS UNIT RELATED SECTION
+5.1VB
IC28
Motor driver
SG
Fig. 11-5
Function
11 - 8
+24VD2 +24VD2
DRMA
DRMB
IC8
DRMC
DRMD
PG
Status
High level
---
ON
CCW
Normal operation
Drum motor
Low level
---
OFF
CW
Reset
May 2006 © TOSHIBA TEC