Black not fixed in Sharp 5141

[mikaeil]

Hi
I have a problem with not fixing the black color in 5141 and similar devices The original toner is used and the fusing unit has been replaced Even the black drum and double-door units have been replaced

[JLSam]

Hi
I have a problem with not fixing the black color in 5141 and similar devices The original toner is used and the fusing unit has been replaced Even the black drum and double-door units have been replaced

You replaced the black drum/ and fuser? Well if it's not a fuser, then it could be overtone.

Try replacing the black developer, and make sure you go through ALL the print/copy/halftone/gamma calibrations afterwards.

Good luck.

[Prints Charming]

Classic example of unfused toner stuck within the fuser (Most likely on belt separation plate or on web roller):

^ A recent job was run on heavy stock with plain paper setting. Unfused toner heavily contaminates the web roller, subsequently re-contaminating the lower heat roller & belt ongoing.
^ Check Fuser Pressure Springs. MX5141 should have the updated pressure springs, but confirm both are intact and not broken.
^ Check Fuser temperature settings.
^ Confirm correct media/tray settings.

If you remove the web cleaning unit and it is heavily contaminated, you can rotate this forward manually or in sim 43-31.
If this happens frequently, you can increase the speed of the web roller rotation during normal use in sim 43-32. Depending on values used, the web will finish slightly faster than specification, but not by very much and its not a big deal.

Talk to the users. Do they use heavy paper of any kind? If so, its almost a guarantee they've used heavy paper on plain paper setting. Unfused toner contaminates the next sheets exactly like your sample.

[copiertec]

To add, also check to make sure fuser settings are set to 23-28lbs as default. It can be found in system settings, device control.