Canon imageRUNNER 330 Service Manual page 52

a. Turning Off and On the Main Motor
When the main motor drive signal goes '1', the control circuit on the main motor driver PCB
turns on to generate drive current, thereby starting the main motor.
When the drive signal goes '0', on the other hand, the output of the control signal stops, and the
absence of drive current stops the main motor.
b. Controlling the Main Motor to a Specific Speed
The machine's main motor is subjected to constant speed control, ensuring that it rotates at a
specific speed.
The driver PCB controls the motor in such a way that the frequency of the clock pulses
occurring as a result of the rotation of the motor and that of the reference pulse signal from the main
motor PCB will match. While in control, the motor sends a signal (M1LCK=1) to the DC controller
PCB to indicate that it is rotating at a specific speed.
c. Detecting Errors (E010)
If a fluctuation occurs in the rotation of the main motor for some reason, the signal used to
indicate rotation at a specific speed (M1LCK) goes '0'; the condition will be identified as a main
motor error and, as a result, all operations will be stopped and 'E010' will be indicated on the
control panel.
COPYRIGHT © 1999 CANON INC. CANON imageRUNNER 400/330 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 2 BASIC OPERATION PROVIDES
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