Feed/Transport Motor Control Circuit - Toshiba e-STUDIO2500c Service Manual

10.5.3

Feed/Transport motor control circuit

The feed/transport motor, which is a brush-less DC motor driven by control signals from the ASIC on
the LGC board, drives the feed roller, pickup roller and transport roller in each drawer and the bypass
unit.
LGC board
IC41
ASIC
IC56
ASIC
Control signal
Signal
FDMON Motor ON signal
FDMDIR Rotation direction signal
FDMGA Speed switching signal
FDMCK Reference clock
FDMRDY Rotation lock detection signal
* CW: Clockwise rotation, CCW: Counter clockwise rotation viewing from the axis
* FDMDIR signal is fixed at a high level and rotates only counter clockwise.
* When thick paper or OHP sheet is used, the clock frequency of FDMCK signal is changed to reduce
the motor speed in half and lower the paper transport speed so that the fusibility of toner is
improved.
* When the rotation speed of the motor is set to a low speed, FDMGA signal is changed to a low level
to suppress the rotation fluctuation of the motor.
May 2006 © TOSHIBA TEC
+24VD1
IC19
FDMCK
FDMGA
+5.1VB
FDMDIR
IC57
FDMON
+5.1VB
FDMRDY
Fig. 10-8
Function
10 - 13
Feed/transport
motor
Status
High level
OFF
CCW CW (unused)
High speed
---
Unlocked
(Rotating at a constant
speed)
e-STUDIO2500c/3500c/3510c PAPER FEEDING SYSTEM
Low level
ON
Low speed
---
Locked
10