Canon DADF-M1 Service Manual page 59

- turning on/off the motor
- controlling the speed of motor rotation
ADF driver PCB
IC9 on the ADF driver PCB receives data (command) from the host machine on printing mode (magnification,
operation mode, timing); in response, it generates drive pulses to drive the lock motor.
The lock motor (M4) is a stepping motor, and the direction and speed of its rotation are changed by changing the
order and frequency of drive pulses (A, A*, B, B*).
MOT-A
MOT-B
MOT-CUT
+5V
IC9
CPU
MOT-REF
REF
MOT-REF
J9
B*
6
IC2
B
5
Motor
Driver
A*
4
A
3
3
F-2-30
Chapter 2
M4
2-33