Xerox WorkCentre Pro 657 Manuale utente

Maintaining the Machine

14-38 Document WorkCentre Pro 635, 645, 657

Cleaning the Components as Needed

Dirt or dust gather in the machine and can cause the machine to print

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

Developer Assembly. Dirt or dust on the contacts causes the

printer to blur characters.

•Metering Blade— The Metering Bade is located above the black

toner roller on the Developer Assembly. Dirt between the magnet

roller and the metering blade causes the machine to print vertical

lines.

•Document Scanner— The Document Scanner is located on the

underside of the Control Panel.

•Scanner Rollers and Retard Pad— The Scanner Rollers and

the Retard Pad are parts of the automatic document feeder inside

the scanner.

Maintaining the Machine

Document WorkCentre Pro 635, 645, 657 14-39

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

Open Lever

Top Cover

023

Maintaining the Machine

14-40 Document WorkCentre Pro 635, 645, 657

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 light

could lower the print quality.

2. Remove the Developer Assembly from the machine. The

following figure shows how to remove the Developer Assembly.

3. Place the Developer Assembly on a level surface.

Developer Assembly

065

Maintaining the Machine

Document WorkCentre Pro 635, 645, 657 14-41

4. Separate the Drum Unit from the Developer Assembly. The

following figure shows the Drum Unit and the 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.

Drum Unit

Developer Assembly

098

Maintaining the Machine

14-42 Document WorkCentre Pro 635, 645, 657

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

084

Right Side

Maintaining the Machine

Document WorkCentre Pro 635, 645, 657 14-43

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

Rear

Mylar Scraper

Metering Blade

098

Maintaining the Machine

14-44 Document WorkCentre Pro 635, 645, 657

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.

9. Holding the Developer Assembly by the green handles, align the

three shafts on the Developer Assembly sides with the slots in the

machine frame. Lower the assembly into the machine.

Drum Unit

Developer Assembly

026

Developer Assembly

027

Maintaining the Machine

Document WorkCentre Pro 635, 645, 657 14-45

The following figure shows how the shafts on the Developer

Assembly align with the slots.

028

Maintaining the Machine

14-46 Document WorkCentre Pro 635, 645, 657

10. Press firmly on the green squares on the Drum Unit until the

Drum Unit clicks into place. The following figure shows how to

press the Drum Unit into place.

11. Close the Top Cover. Press down the Top Cover until a "click" is

heard to ensure the cover is closed.

Drum Unit

029

Top Cover

101

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