Controlling The Main Motor (M1) - Canon NP6512 Service Manual

D.

Controlling the Main Motor (M1)

1. Outline
Table 2-102 shows the functions of the main motor control circuit, and Figure 2-104 is a block
diagram of the circuit.
Item
Power supply
Drive signal
Moving/drive parts
Control
Error detection
DC
controller
PCB
J103
-7
J104
-1
COPYRIGHT © 1999 CANON INC.
24 VDC from the composite power supply.
Signal (MMD) from the DC controller PCB.
Photosensitive drum, primary charging roller, developing assembly,
transfer charging roller, pickup roller, vertical path roller, registration
roller, feeding assembly, fixing assembly, delivery roller, heat exhaust
fan
Executes on/off control.
Executes constant speed rotation control.
Issues 'E010'.
Table 2-102
+24V
J205
-4
-3 GND
J203
-2 MMD
-3
J204
-7 -1 MLOCK
Composite
power
supply
PCB
Figure 2-104
CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 2 BASIC OPERATION
Description
J901
24V -1
Phase
control
-2
drive
circuit
-3
-4
Reference signal
Clock pulse
generator
Drive
current
Main motor
(M1)
Hall IC output
MMCLK
Main motor drive PCB
2-5