C2801 bizhub 750 - Konica Minolta Konica 600/750 Mount Kit For Konika Fk-502 Fax Kits - Lk

Please explain as per documentation what is C2801 error code I can help you

Which password the admin or the individual passwords Default admin 12345678 or 00000000
Go to:
Admin setting- Security setting -admin password

When was the last time the developer was replaced in the developer unit? If has been replaced then you might have a bad ATDC (Automatic Toner Density Control) sensor Located at the rear of the drum and below. (Remove drum to see, has a white cover on it attached to a control board, needs cleaning,2nd replace. If the developer was replaced when it was done was a vacuum cleaner used? IF so the static electricity from the vacuum clear destroyed the sensor, NEVER USE a VACUUM cleaner to remove the developer. Also when the developer was replaced, was counter cleared to tell the copier developer was replaced, the copier use the counters to determine certain voltages for certain assemblies, if not image problems and codes can appear. Finally was the F8 run after the developer was installed before any prints or copies made? If not buy new developer and start over, counter is to be cleared first, then developer replaced, then F8 run.

Might want to have the developer replaced and drum/cleaning blade normally done all together, then run the F8 procedure and make sure the counters where cleared. Did you recently replace the drum and the developer if so did you clear the counters for the drum and developer, FIRST? IF not then the copier thinks the new drum and new developer are old. The copier works on the counters that is how it knows it got a new drum and developer. Get new developer and a new drum and have it installed correctly. Counters are clear before the unit is yanked out of the machine, then you remove the image unit/drum unit replace the developer/drum and cleaning blade. (DO NOT USE A VACUUM CLEANER WHEN REPLACING THE DEVELOPER static electricity can destroy the sensor located below the developer unit. Then reinstall and RUN F8. Make sure the fax line and Ethernet cable is removed can't print anything until the F8 is run. Or you will start all over again with new developer and a new drum.

actually code c28xx have 7 variant. for example, c2801, c2802, c2803 (error 3,4,5,6) and c2804. if follow the code code c28xx is TCR output abnormality.
ok, first you clean T/S block, do servicing and cleaning all parts.
second, if still same, do toner auto supply.
third, trouble reset. off your machine first, press and hold utility/counter and on machine, until trouble reset appear. press it and off/on again. ^^,

Maximum density correction problem.Clean the AIDC sensor located under OPC drum.

see discharge corona

In my experience you have to change the developer and the machine will be ok.Also there is a chance that you have to clean the two toner sensor that are located in the end of the toner bottle,sometimes there is the problem.please let me know.

bizhub 600/750 warming up and error 2801
please help

whY?