COPYRIGHT © 1999 CANON INC.
CANON ADF FOR iR600 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
2-31
CHAPTER 2 OPERATIONS
5.
Controlling the Pickup Motor (M3)
Figure 2-226 shows the circuit used to control the pickup motor (M3). The pickup motor is a 4-
phase stepping motor, and the circuit has the following functions:
Turning on and off the motor
Controlling the direction of motor rotation
Keeping the motor at rest
Figure 2-226
The CPU (Q1) on the ADF controller PCB causes the motor retention signal (PICKHOLD) to
go '0', and a24 R to the pickup motor for drive. At the same time, the CPU sends the phase
control signal (PICKA, PICKB) to the motor driver (Q24). In response, the motor driver controls the
output timing of the pulse signals to suit the phase control signal, thereby switching the rotation of
direction of the pickup motor.
In the absence of the phase control signal (PICKA, PICKB) from the CPU, the motor retention
signal goes '1', ap5 R to the pickup motor for retention, thereby holding the motor shaft from
rotating.
Q24
+5R
+24R
A
A*
B
B*
M3
+5v
Q53
Q52
Q1
CPU
J11
PICKHOLD
PICKA
PICKB
6
2
4
5
3
1
ADF controller PCB
Motor retention signal
Phase control signal
Phase control signal
Pickup motor
Motor
driver
Related Error Code
• Error in the pickup motor (M3)
• Error in the pickup roller height sensor (PI8)
• Error in the pickup roller height sensor (PI9)
• Error in the pickup roller home position sensor (PI7)
• Error in the ADF controller PCB
E410