50.3 fuser error Related to Overheat – HP Laserjet 4000, 4050, 4100
50.3 fuser error Related to Overheat  – HP Laserjet 4000, 4050, 4100
The 50.3 fuser error  HP Laserjet  4000, 4050, and 4100 machines is a high temperature error.  The nice thing about these machines is that HP is getting more specific in detail about what the errors mean so you can better troubleshoot these problems and hopefully get your machine back up in running in as little time as possible. In this article about  the 50.3 Fuser Error  in the HP 4000, 4050, and 4100 I will discuss, troubleshooting the error,  removal and replacement of the fuser, and provide you with a link to buy a new fuser if needed.
HP 4000/4050 Fuser Assembly RG5-2661-000
HP Fuser for LaserJet 4100
Troubleshooting The HP Laserjet 4000, 4050, and 4100 50.3 Fuser Error
First thing to try in troubleshooting the HP Laserjet 4000, 4050, and 4100 50.3 Fuser Error  message is just turning the machine off and let it  sit 10 to 20 minutes to allow the fuser  to cool of then turn it back on and see what happens. HP recommends this  in the service manual and is what any tech or service company would say if you were to call and ask for some advice. Second, is to check that it has proper ventilation. You should allow at least a 3 to 4 inches on all sides for proper cooling. Third thing to check for  is your print jobs. If you are printing off a huge report or other job with lots of pages is to break the job up into smaller portions allowing the machine to periodically cool down. Last thing to check with the 50.3 fuser  error on the HP 4000, 4050, and 4100 is the  type of paper that you are using. In some cases if you are using a heavy paper type the machine heats up the fuser to a  higher temperature  so it can properly bond the toner to the paper. If you run the machine like this for an extended amount of time it can overheat the fuser resulting in the 50.3 fuser error.
Advanced Troubleshooting for the HP Laserjet 50.3 Fuser Error in a 4000, 4050, and 4100
1. If the message persists, reseat  the Fuser. If that does not work, replace the Fuser.
2. To check the Fuser, turn the printer off and remove the Fuser. Measure the resistance between the Fuser  connectors J132-1  and J132-2. If it is not within the range of 200k Ω  to 500kΩ, replace the Fuser.
3. If there is no continuity between the Fuser  connectors J143F  (neutral) and J142F  (hot) with the Fuser  removed, replace the Fuser.
HP 4000/4050 Fuser Assembly RG5-2661-000
HP Fuser for LaserJet 4100
4. If the problem is not related to the Fuser, replace the Engine Controller Board
Conclusion About the HP Laserjet 4000, 4050, and 4100 50.3 Fuser Error Message
Above, I listed  the ways to check out the fusing assembly from a technical point of view for all you people or technicians  intent on finding out as much as possible about your machine. For all you other people reading the information and thinking OK I’m not going to go that far in try to figure this problem out your probably better off. 99% percent of the time your just going to end up replacing the fuser  anyway. So below, I’ve listed the instructions on how to remove the fuser  from the various models and put links up to purchase a new fuser  to fix your 50.3 fuser error in your HP laserjet 4000, 4050, and 4100.
HP Laserjet  4000, 4050, and 4100 Fuser Removal
Note: Unplug power and communication cables and allow at least 10 minutes for cool down before fuser removal.
1a. 4100 – Facing the rear of the printer, press the left side (formatter side) of the rear output bin and release the hinge from the slot.
1b. 4000 – Facing the rear of the printer, pinch the right side of the Rear Output Bin and release the hinge from the slot.
1c. 4000 – remove the Left and Right Duplex Access Covers from the rear of the printer by pulling each from the bottom.
2. Rotate the output bin away from the printer until the right hinge pin is released, and then remove the output bin.
3a. 4000 and 4050 remove the two screws
3b. 4100 Rotate the two blue levers on the fuser assembly up to the unlocked position.
4. Pull the fuser straight back and out of the printer.
Hopefully, this article has helped you troubleshoot the 50.3 fuser error in your HP laserjet 4000, 4050, and 4100.
HP 4000/4050 Fuser Assembly RG5-2661-000
HP Fuser for LaserJet 4100
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