Controlling The Belt Motor (M2) - Canon DU7-1101-000 Service Manual

2.

Controlling the Belt Motor (M2)

Figure 2-230 shows the circuit to control the belt motor (M2). The belt 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.
• Controlling the speed of motor rotation.
J7
6
1
2
3
Q1
4
CPU
5
9
10
11
7
8
12
13
14
J12
3
ADF controller PCB
The CPU (Q1) on the ADF controller PCB sends the appropriate motor control signal to the belt
motor driver PCB. The belt motor driver PCB, in response, controls each specific motor according to the
signal.
Signal
REF-CLK
MO1
MO2
CW/CCW
B-Vref
BTCLK
Related Error Code
E402
COPYRIGHT © 1999 CANON INC.
J71
+5R
9
REF-CLK
14
MO1
13
MO2
12
CW/CCW
Q601
11
B-Vref
10
+24R
6
5
4
8
7
3
2
Belt motor driver
1
PCB
Figure 2-230
Description
Serves as reference clock pulses.
Sets motor operation mode.
Sets motor operation mode.
Sets direction of rotation.
Sets motor torque.
Monitors motor operation, Sets belt stop position.
Table 2-213
• Error in the belt motor (M2)
• Error in the belt motor clock sensor (PI1)
• Error in the ADF controller PCB
CANON ADF FOR iR600 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 2 OPERATIONS
+24R
J72
A
3
1
A*
4
B
5
2
B*
6
BTCLK
M2
PI 1
2-35