Page 1
Maintaining the Machine
Cleaning the Components as Needed
Dirt or dust g ather in the mac hine and can ca use t he ma chi ne to pr int
incorrectly. The following lists the parts to clean and how the dirt can
affect the print quality.
• Contacts— These groups of contacts are located under the
• Metering Blade— The Metering Bade is located above the black
• Document Scanner— The Document Scanner is located on the
• Scanner Rollers and Retard Pad— The Scanner Rollers and
Developer Assembly. Dirt or dust on the contacts causes the
printer to blur characters.
toner roller on the Developer Assembly. Dirt between the magnet
roller and the metering blade causes the machine to print vertical
lines.
underside of the Control Panel.
the Retard Pad are parts of the automatic document feeder inside
the scanner.
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Page 2
Maintaining the Machine
Use the following procedure to clean the additional components:
1. Grasp the Top Cover Open Lever and open the Top Cover.
WARNING
Do not touch the fuser housing inside the machine. The fuser
housing is extremely hot while the machine is operating.
Top Cover
Top Cover
Open Lever
023
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Page 3
Maintaining the Machine
2. Remove the Developer Assembly from the machine. The
CAUTION
Always hold the Developer Assembly by the green
handles. Do not touch the green drum area or the
black roller. Do not leave the Drum Unit out of the
machine for an extended period.
Touching the drum or exposing the Drum Unit to l igh t
could lower the print quality.
following figure shows how to remove the Developer Assembly.
Developer Assembly
065
3. Place the Developer Assembly on a level surface.
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Page 4
Maintaining the Machine
4. Separate the Drum Unit from the Developer Assembly. The
following figure shows the Drum Unit and the Develo per
Assembly.
Drum Unit
098
Developer Assembly
5. Place the Drum Unit on a level surface. Cover the Drum Unit with
a clean cloth to protect the unit from exposure to light.
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Page 5
Maintaining the Machine
To clean Contacts
6. Use a cotton swab to clean the silver contacts in the machine.
Contacts are located inside the chassis in the front, on the right,
and in the rear. The following figure shows the locations of the
contacts.
086
Front
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084
Right Side
Page 6
Maintaining the Machine
Rear
To clean the Metering Blade
7. Use the Mylar Scraper to scrape off the toner between the
metering blade and the black toner roller on the Developer
Assembly. The following figure shows how to clean the Metering
Blade.
085
Metering Blade
Mylar Scraper
098
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Page 7
Maintaining the Machine
8. Position the Drum Unit with the green drum surface facing the
black toner roller on the Developer Assembly. Without touching
the green drum surface, hook the Drum Unit to the Developer
Assembly. The following figure shows how to join the Drum Unit
and the Developer Assembly.
Drum Unit
026
Developer Assembly
9. Holding the Developer Assembly by the green handles, align the
three shaft s on the Devel oper Assemb ly sides wit h the slot s in the
machine frame. Lower the assembly into the machine.
Developer Assembly
027
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Page 8
Maintaining the Machine
The following figure shows how the shafts on the Developer
Assembly align with the slots.
028
Document WorkCentre Pro 635, 645, 657 14-45
Page 9
Maintaining the Machine
10. Press firmly on the green squares on the Drum Unit until the
11. Close the Top Cover. Press down the Top Cover until a "click" is
Drum Unit clicks into place. The following figure shows how to
press the Drum Unit into place.
Drum Unit
029
heard to ensure the cover is closed.
Top Cover
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101
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