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How to Identify and Fix Common Problems ?

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The message `Fuser Error` or `Self-Diagnostic` means either the fuser has reached the maximum temperature allowed or there has been an error in detection of the correct temperature during specific times of the printing process.
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 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.
The fuser unit or fuser is a critical part of any laser printer. Using pressure and heat, it fuses the toner powder onto the page to create a print, and without it, the printer cannot operate.
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.

A fuser unit is a pair of heated rollers within the printer that fuses the toner onto the paper being printed on. Toner particles are pulled to the paper to create the desired text and images as the paper passes the imaging drum.
This error might display if the fuser temperature becomes too hot. Follow these steps to turn off the printer and allow the fuser to cool before printing again. Press the Power button to turn off the printer. Disconnect the power cord from the rear of the printer.
The fuser unit or fuser assembly, is a critical component of your laser printer. Using pressure and heat, it fuses the toner powder onto the page to create a print, and without out it, your printer cannot operate.
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.

Fuser kits replace the heating element in Laser printers that fuses toner onto paper. These elements wear out from normal use, and many printers need a new fuser every 60,000 pages.
This error might display if the fuser temperature becomes too hot. Follow these steps to turn off the printer and allow the fuser to cool before printing again. Press the Power button to turn off the printer. Disconnect the power cord from the rear of the printer.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

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

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

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

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

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fuser
ANSWER : You can buy just the upper fuser roller that is the cause of your problem. The real problem is that there are no instructions for rebuilding the fuser. The Brother fusers are a bit difficult to take apart.

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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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Fuser burning labels
ANSWER : Make sure the labels are rated for a laser printer as the ones for inkjet printers cannot tolerate the heat produced by a laser printer and will tend to scorch. If the labels aren’t rated for a laser printer then there may be nothing wrong with printer.

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