User manual

95.08.23.11.29
Color LaserWriter 12/600 PS Basics & Theory 1–29
Main Motor
(M2)
The main motor is a DC brushless motor. It is controlled by the CPU
on the mechanical controller board and provides mechanical drive to
the following parts:
• Fuser assembly
–Upper and lower fuser rollers
–Fuser delivery roller
–Oil-applying roller
–Oil pump
• Paper delivery assembly
• Transfer drum peripherals
–Attraction roller press cam
–Transfer drum press cam
–Cleaning brush press cam
–Discharge roller press cam
• Waste toner screw inside the photoconductor cartridge
The main motor itself is not a part of the printer drive assembly but is
available separately as P/N 922-1370.
Toner
Carousel Motor
(M3)
The toner carousel motor is a two-phase stepping motor controlled by
the toner carousel motor driver (Q2003) on the mechanical controller
board. This motor is part of the printer drive assembly and provides
mechanical drive to the toner carousel.
Drum Motor
(M4)
The drum motor is a two-phase stepping motor controlled by the drum
motor driver (Q2002) on the mechanical controller board. The drum
motor is part of the printer drive assembly. It provides mechanical
drive to the photosensitive drum and to the transfer drum.
Cleaning
Brush Motor
(M5)
The cleaning brush motor is a DC motor. It is controlled by the CPU on
the mechanical controller board and provides the mechanical drive that
rotates the transfer drum cleaning brush.
Scanner Motor The scanner motor is a three-phase, eight-pole DC brushless motor with
a built-in hall element. The scanner motor rotates a six-sided mirror that
in turn scans the laser beam, which has been emitted from the laser
diode, in the horizontal scanning direction.
Toner Carousel
Motor M3
Drum Motor M4
Position of
Main Motor M2