Laserjet 2100 fuser – more detailed analysis

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.

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.

50.2 error indicates that the printer is not heating up fast enough. This can be caused by a bad heating element in the fuser but can also be caused when the printer does not have adequate power due to overloaded circuits or being plugged into a power strip or surge bar that limits current flow.

When a 50.4F. 00 error is displayed on the control panel, it indicates that there is an issue with the fuser or the power outlet where the printer is connected. Turn the printer off, and then back on to clear the error. Ensure that the power outlet, to which the printer is connected, is in good working condition.

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 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.

Issue Description: 50.7F00 is displayed on the control panel and printer may also experience frequent or constant paper jams in the fuser. Remove the fuser. On the right side of the fuser near where the fuser engages the fuser drive assembly, check if the alienation flag is broken (see the two examples below).

Description: This error is primarily caused by a transfer alienation failure in which the ITB is stuck and unable to rotate, the SR9 sensor (the primary transfer roller disengagement sensor) has gone bad or the fuser drive assembly has failed.

Laser printer fusers adhere toner powder to a page using a combination of heat and pressure. Error 50.5 occurs when the fuser fitted physically but the printer has specifically identified it as wrong.