Brother DCP 9020CDW
Hi there,

Experienced technical support provide their insights in answering this question :
Should be in the service manual. http://www.manualslib.com/products/Brother-Dcp-9020cdw-3385466.html

How to Identify and Fix Common printer Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced technical support :

The fuser unit is a consumable item that requires periodic replacement. After you have printed approximately 100,000 pages (letter or A4 size paper), the message `Replace Fuser` will appear on the LCD display. NOTE: The actual number of printed pages will vary depending on the print jobs and paper you use.
The fuser unit must be replaced every 100,000 pages, usually along with the transfer belt and feed rollers as part of a maintenance kit. The error code 010-351 indicates that the fuser has reached 100,000 pages and should be replaced immediately. The printer will not operate until the fuser unit is replaced.
Streaking, smudging, black lines, and double images are all symptoms of a bad fuser. When you notice these printing defects and experience problems, such as paper jams or wrinkles, this is a good sign to replace the fuser kit.
The Fuser is the piece that fixes the toner on the paper. This, like any other consumable part, wears out with the regular use of prints, since it is one of the components that suffers the most due to its mechanical wear and overheating of its components, due to the high temperatures it must withstand.
Fuser Units

The coating wears off and causes the toner to not fuse properly. There are replacement rollers and sleeves on the market that you can replace and turn a non-functional fuser into a good working one. Rebuilding fuser assemblies is not a new thing.

The fuser unit is a heated roller that melts the toner particles onto the page as it passes through. This seals the toner to the page so it`s no longer in powder form and makes sure that the toner doesn`t smudge of fall off the paper when it comes out of the printer.
Most fusers last between 50,000 and 200,000 pages, depending on the design. Smaller cheap printers tend to have short fuser lives, while fusers used in larger office printers tend to be long-lasting and easily replaced.
The message “Fuser Kit Low” or “Fuser Kit Very Low” on your HP Color LaserJet M553 series printer is a warning that you have reached the recommended number of prints for your fuser assembly. (The fuser assembly is the consumable part in your printer which heats up and bonds toner to the paper.
A fuser unit is made up of two rollers; one to apply heat and one to apply pressure. The heat roller is a hollow (usually metal) tube that is heated by a radiant heat lamp suspended in its centre (so the tube is heated uniformly), while the pressure roller is a backing roller made of rubber.
– Preprinted paper must use ink that can withstand the temperature of the machine`s fusing process 392 degrees Fahrenheit (200 degrees Centigrade).
The following are the top reasons why paper jams occur:

unsupported paper/media is used. incorrect paper settings in the tray and/or the print driver. paper loaded incorrectly and/or paper edge guides not adjusted properly in the tray.

Most fusers last between 50,000 and 200,000 pages, depending on the design. Smaller cheap printers tend to have short fuser lives, while fusers used in larger office printers tend to be long-lasting and easily replaced.
As print quality goes down over time, this will be a reason to replace the color printer. We find a black and white printer can sometimes last 10 years or more and most color laser printers are replaced every 3 to 5 years.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Fuser Flag Sensor Spring has fallen out
ANSWER : Should be in the service manual. http://www.manualslib.com/products/Brother-Dcp-9020cdw-3385466.html

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Brother DCP 9020CDW

REMOVE FUSER UNIT
ANSWER : It looks real easy. https://www.youtube.com/watch?v=fbilywC620A

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Brother DCP 9020CDW

fuser bushings
ANSWER : Kind of vague. Are you asking how to install fuser bushings?

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Brother DCP 9020CDW

spring with wheel.what is it called
ANSWER : So we are supposed to know what you are talking about when we have no idea what printer you have and can’t see the part.

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Brother DCP 9020CDW

FUSER JAM
ANSWER : I have the same problem. please help

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Brother DCP 9020CDW

pair of springs left over
ANSWER : I’m going to go with the separation pad. It has 3 springs. Just look at it and see if it has just the one spring in the center. I guess that must be enough to raise it into position. Easy enough to re-install the 2 that are left over. Just be careful not to lose 1.

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Brother DCP 9020CDW

HP Laserjet 4200 50.2 Fuser error
ANSWER : if you are using a good fuser the next part to try would be low voltage power supply

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Brother DCP 9020CDW

HP 4250 13.06.00 Fuser output paper stop !
ANSWER : pick up solenoid

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Brother DCP 9020CDW