1/05
10-51
DocuColor 12/DCCS50
Overview, Main Motor
Principles of Operation
Reissue
Overview
The Start Power Chain comprises the Main Motor and Drum Motor, their control circuitry and
their mechanical drive systems. The Start Power Chain is activated when the user presses the
Start button on the User Interface with the machine powered.
Main Motor
The Main Motor is a multispeed motor whose speed is controlled by a clock signal from the IOT
CPU PWBA. As shown in Figure 1, the Main Motor drives the following machine elements:
• The Mag Roller, the Auger, and the Pickoff Roll (BPO) in the Developer Subsystem
• The Intermediate Belt Transfer (IBT) Cleaner Cam and the IBT Cleaner Auger
• The IBT Second Bias Transfer Roller (BTR)
• The Waste Toner Auger, the Waste Toner Bottle Entrance Auger and the Toner Bottle
• The Photoreceptor (PR) Drum Brush, the PR Drum Cleaner Auger Rear and t
he PR Drum
Cleaner Auger Front
Figure 1 Main Motor Location and Mechanical Drive System
The Main Motor operates at three speeds, depending on the type of blank media being pro-
cessed. Motor speed is controlled by the IOT CPUIOT
CPU PWBA which uses its address and
data buses to write control data to decoder circuitry on the IOT Drive PWBA.
Motor speed is controlled by the IOT CPU PWBA
which uses
its address and data buses to
write control data to decoder circuitry on the IOT Drive PWBA. As shown in Figure 2, the indi-
vidual outputs from the decoders are sent
th
rough drivers to the motor. Table 2 shows the Main
Motor operating states resulting from various combinations of control lines.
MAIN MOTOR
MAIN MOTOR DRIVE
BELT (1 OF 2)
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