Fuser Motor Control Circuit - Toshiba e-STUDIO2330C Service Manual

16.5.2

Fuser motor control circuit

The fuser motor, which is a brush-less DC motor driven by control signals from the ASIC on the LGC
board, drives the pressure roller.
LGC board
IC48
ASIC
IC60
ASIC
Control signal
Signal
FSMON Motor ON signal
FSMDIR Rotation direction signal
FSMGA Speed switching signal
FSMCK Reference clock
FSMRDY Rotation lock detection signal
FSMSK Motor brake signal
* CW: Clockwise rotation, CCW: Counter clockwise rotation viewing from the axis
* FSMDIR signal is fixed at a high level and rotates only counter clockwise.
* When thick paper or OHP sheet is used, FSMGA signal moves to a low level to reduce the motor
speed in half and lower the paper transport speed so that the fusibility of toner is improved.
© 2008, 2009 TOSHIBA TEC CORPORATION All rights reserved
+24VD1
IC84
FSMCK
FSMBK
FSMGA
FSMDIR
IC79
FSMON
+5.1VB
FSMRDY
Fig. 16-6
Function
16 - 15
Fuser motor
Status
High level
OFF
CCW
High speed
---
Unlocked
(Rotating at a constant
speed)
OFF
e-STUDIO2330C/2820C/2830C/3520C/3530C/4520C
FUSER UNIT / PAPER EXIT SECTION
Low level
ON
CW
Low speed
---
Locked
ON
16