PrinterSpecialists.org

What This Error Means

Error code 077.900 on Lexmark printers typically indicates an issue with the fuser web, often signaling it has reached its end-of-life or has become jammed.

Detailed Explanation

The Lexmark error 077.900 specifically points to a problem with the fuser web, which is a critical component within the fuser assembly. The fuser web is a consumable part, usually a thin, heat-resistant film or roller, designed to clean the fuser roller and prevent toner from building up. Over time and with extensive use, this web can become worn out, torn, or simply reach its operational limit, triggering this error code. When the printer detects that the fuser web is no longer functioning correctly, or that it has run out of its usable length, it will halt operations and display this error. This error can also occur if the fuser web is improperly installed, or if debris or a paper jam interferes with its movement. The fuser's role is to melt toner onto the paper, and a malfunctioning fuser web can lead to poor print quality, toner smudging, or even damage to the fuser roller itself if not addressed. While it's primarily an end-of-life indicator, it's worth checking for simple obstructions before assuming a replacement is necessary.

DIY Troubleshooting Steps

Try these steps before calling a specialist

1
Turn off the printer completely and unplug it from the power source to ensure safety.
2
Open the printer's front or side cover to access the fuser unit. Consult your printer's manual for the exact location and removal procedure.
3
Carefully remove the fuser assembly from the printer. It will likely be hot if the printer was recently in use, so allow it to cool or wear protective gloves.
4
Inspect the fuser web area for any visible paper fragments, toner buildup, or foreign objects that might be obstructing its movement. Gently remove any debris.
5
Check the fuser web itself for any tears, wrinkles, or signs of excessive wear. If it appears damaged, it will need replacement.
6
If no obvious damage or obstruction is found, try reinstalling the fuser assembly, ensuring it's seated correctly and all latches are secured.
7
Close all printer covers, plug the printer back in, and power it on. Observe if the error clears.
8
If the error persists, the fuser web has likely reached its end-of-life and the fuser assembly (or just the web, if replaceable separately) will need to be replaced.
9
Consider performing a fuser web reset through the printer's service menu, if available for your model, after replacement or inspection (consult your service manual for specific steps, as incorrect resets can cause issues).

When to Call a Specialist

You should call a specialist if you have followed all the DIY steps and the error persists, indicating a definite need for fuser web replacement. While replacing the fuser assembly is often a user-serviceable part, some models may require more intricate disassembly or specialized tools. If you're uncomfortable handling internal components, or if the error code returns immediately after replacing the fuser web/assembly, it suggests a deeper electronic or sensor issue that warrants professional diagnosis. Additionally, if you find any other damage within the printer during your inspection, such as damaged gears or wiring, a technician should be called.

Find a certified printer specialist near you →

LEXMARK Error Code 077.900