F. Drum Motor/Pick-Up Motor/
Fixing Motor Control Circuit
1. Outline
The NP6085 derives its drive from the follow-
ing three motors:
Table 3-101
Figure 3-120 is a block diagram showing the
control circuit of each motor, and the circuits have
the following functions for their respective motors:
q
Turns ON/OFF the motor.
w
Switches the speed of the motor.
e
Controls the motor to a specific speed.
Each motor is a DC motor with a built-in clock
pulse generator, generating clock pulses
(DMCLK/PMCLK/FMCLK) according to the revo-
lution of the motor.
Each motor controller PCB on the other hand
uses these clock pulses to stabilize the speed of
the motor.
The clock pulses (DMCLK/PMCLK/FMCLK) is
frequency divided to 1/4 and are sent to the DC con-
troller PCB as clock pulses (DMFG/PMFG/FMPL)
for sequence control.
3. OPERATIONS AND TIMING
COPYRIGHT © 1996 CANON INC.
CANON NP6085 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
3-21
Provides drive to the photosensitive
drum/developing assembly.
Provides drive to the paper
deck and front tray.
Provides drive to the fixing
assembly, reversing assembly,
duplexing assembly, and buf-
fer assembly.
Drum motor
Pick-up motor
Fixing motor
Motor drive circuit
Frequency
comparison
Switching
circuit
Phase
comparison
signal
V
Reference
signal
generator
Frequency
division
Mixing
Q158
Master
1/4
frequency
division
Frequency
comparison signal
Q115
Slave
DC
controller
PCB
Amplification
and wave
rectification
FMPL
PMFG/
DHFG/
FMD
PMD/
DMD/
FMFS
PMFS/
DMFS/
U
W
Drum/
Pick-up/
Fixing motor
Rotor
Hall IC
DMCLK/PMCLK/
FMCLK
Drum/pick-up/fixing motor control PCB
Phase
comparison
Figure 3-120
Содержание NP6085
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Страница 498: ...COPYRIGHT 1996 CANON INC CANON NP6085 REV 0 JULY 1996 PRINTED IN JAPAN IMPRIME AU JAPON A 5 ...
Страница 502: ...PRINTED IN JAPAN IMPRIME AU JAPON 0697AB0 6 3 This publication is printed on 70 reprocessed paper ...