Error C2557 What cause this error and how to fix it ?

What is error code c2557 on Konica c220?

Check the toner bottle to ensure that it is feeding toner into the sub hopper unit under the bottle. Sometimes users will insert the bottle incorrectly and not lock it properly in place...the lever on the front of the toner hopper for that bottle is moved down to the left to remove and insert the bottle.
Dec 28, 2010

Error code C2557 - Konica Minolta - Copytechnet

Replace Drum Unit and Developing Unit.
if still, then look for c2557 troubleshooting.
i have already explained on this portal

What is the model number? Ball park! replace the black developer unit and black drum

Hi
I found your error code and suggested remedies here:
Error Codes Konica Minolta bizhub 250 Code C2557
This site is very useful as by changing the drop down menus along the top of the page you can view other errors for your machine and for other models and makes. You can also use the link to get a pdf format Service Manual for your machine.
Hope this is helpful, if so would you please register that with Fixya
Cheers

in utility you have somthing like "check counter" try to get inside and then stop00stop01

Error c2557 means ATDC sensor abnormality.Most probably the developer is very low or weak in such condition.Check the developer.You can also increase ATDC GAIN in technical representative mode in order to get rid of this problem.
Also check the PC life/consumables life in "Counter"---"Special Parts life counter".Check if the life of PC Drum is 100% or near to 100 ten clear its value by pressing "C" button.Clear all counters to zero value.Now restart the machine and run F8.It will run smoothly.If you are replacing new developer then there would be no problem with it.

Hello,
C2557 - Abnormally toner detected black tcr sensor.

Reinstall image unit black
Reinstall toner cartridge
Change Image unit
Change toner carridge.

This code happens if you replace drum without replacing developer. Both must be replaced at same time.

Reset it, start it with the right door open, go to service mode, clear the counters for drum and developer and go to functions menu. Close the right door and start immediately the F8 function. It should work.

I can even reach the "service mode".
The screen shows the error (c2557) and I can not access to anyother function.