Controlling The Laser Scanner Motor; Outline - Canon iR5000 Service Manual

4. Controlling the Laser Scanner Motor

4.1 Outline

The following signals are used to control the laser scanner motor:
[1] Laser scanner motor drive signal. When '1', the laser scanner motor is turned on (i.e.,
turning on/off the motor).
[2] Laser scanner motor speed switch signal. When '0', the motor is rotated at full speed;
when '1', in-wait rotation (i.e., switching the speed).
[3] Laser scanner motor ready signal. When '0', the laser scanner motor is rotated at a con-
stant speed (constant speed rotation control).
DC controller
PCB
E110
It is indicated under the following conditions:
[1] If the laser scanner motor ready signal (LMRDY*) goes '1' when the
motor is rotating.
[2] If the laser scanner motor ready signal (LMRDY*) does not go '0'
within a specific period of time.
COPYRIGHT © 2000 CANON INC.
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J116
J2511 (J1)
LMSPSEL [2]
1
*
LMRDY [3]
2
LMON [1]
3
+24V
4
GND
5
F03-401-01 Functional Block Diagram
2000 2000 2000 2000 CANON iR5000/iR6000 REV.0 JULY 2000
CHAPTER 3 LASER EXPOSURE SYSTEM
5 Speed
Motor
control
4
driver
3 circuit
2
1
Reference
pulse generation
circuit
M15
Laser scanner
motor
3-9 P