Xerox DocuColor 12/DCCS50, Service Manual

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10-128 DocuColor 12/DCCS50
Cleaning Systems
Reissue
Principles of Operation
– Photoreceptor Scraping Blade
– Flicker Bar
– Bead Pick-off Roll (BPO)
– Pre-Clean Corotron
– Photoreceptor Waste Auger
• IBT cleaning components -
–
IBT Scraping Blade (cammed)
– IBT Waste Auger
– Film Blade (thin Mylar seal)
The Toner Recovery Auger rotation is monitored by an Auger Sensor. A semi-circle flag
attached to the end of the Auger rotates through the Sensor as the Auger rotates. The Sensor
is sampled 10 times (0.1 sec. cycle) every 2 seconds while the Drum Motor rotates. An Auger
“caution” (09-424) is indicated at the User Interface when the Sensor does not detect move-
ment (high/low status of rotating flag) 4 times continuously.
An Auger Broken “fail” status (09-358) is indicated when the number of copies reaches a spec-
ified value after the “caution” status is activated and remains.
Figure 2 Junction Assembly for Waste Toner Disposal
Figure 3 shows part of the Waste Toner Auger Junction Assembly which is located in the back
of the machine. This system uses separate jointed augers to acquire waste toner from the Pho-
toreceptor Drum and the IBT. These augers transport the waste toner the Slanting Auger,
which transports the toner to the Bottle Auger. The Bottle Auger transports the waste toner into
Waste Toner Bottle.
The Waste Toner Bottle is a CRU with the capacity to hold 2600cc of toner residue with full vol-
ume at 80% (expected bottle life to full at 40Kpv). As shown in
Figure 1 , two augers are used to
fill the bottle:
• Bottle Auger - This feeds the waste toner into the bottle and is a part of the Auger Junction
Assembly.
• Coil Auger - This is inside the bottle and is part of it. It helps distribute and pack the waste
toner within the bottle.
The Main Motor drives the jointed augers, the Slanting Auger the Bottle Auger and the Coil
Auger. This motor is energized at the start of a copying or printing job.
The Waste Toner Sensor is a photoelectric sensor that checks for the presence of the Waste
Toner Bottle. This is done when the machine is powered on and the Front Interlock Switch is
closed. A No Waste Bottle failure (09-374) is indicated when the sensor does not see the Bot-
tle.
The Waste Toner Bottle Full Sensor is monitored 3 times a second while the Drum Motor
rotates. When the sensor detects a full status continuously for 3 seconds, then a near full “cau-
tion” (09-420) is indicated at the User Interface.
After the “caution” status, the machine counter monitors and compares to an NVM value the
following cycles to determine a Waste Bottle Full status“fail” (09-376):
• Toner Dispense Motor run time
• Number of copies
The “near full” and “full” status for the Waste Toner Bottle is reset by using the same bottle
sampling method, and the bottle is sensed empty 2 or more times per second.
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