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Error code 2557 - Konica Minolta bizhub C250 All-In-One Laser Printer

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Replace the black image unit

Posted on Jan 10, 2016

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C 2557 - ATDC sensor error.You need to replace the developer in imaging unit.

Jan 03, 2014 | Konica Minolta Office Equipment & Supplies

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I have an error code C-2557 on this Biz 350 with the finisher, without the the finisher m/c works fine

C-2557 ATDC sensor malfunction.Enter in the service mode press following keys:
Utility-Metercount-Details-STOP-0-0-Stop-0-1-press 00000000 press Enter in Tech. mode select Printer than select ATDC gain and read the ATDC current value.If the value is situate 150-160 increase the value to 164-174 (to change the value press C and entering the new value)return in the copy mode turn OFF the copier open the rigy door than close and turn ON the copier and make a few copies.If the error persist discrease the ATDC value and make some copies.If the code persist change the developer .Before change the developer reset the special parts counter I/U counter,developer.After change the developer perform F8 and verify the new value to ATDC gain and notice.

Feb 19, 2013 | Konica Minolta bizhub 350 All-In-One Laser...

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Error code 2557

C-2557 Abnormally low toner density detected black TCR sensor.The TC ratio in the developing machine wich is determined by toner replenishing amount control mechanism is 5% or less for a given number of times consecutively.
Relevant electrical parts:imaging unit K,toner supply motor C/K ,mechanical control board or MFP control board.
Perform image troubleshooting procedure if image density is low.
Clean the TCR sensor window on the underside of the imaging unit if dirty.
Check the toner supply motor operation.
Remove and reinstall imaging unit K. or change the imaging unit.
Last solution turn ON the copier open the front door ,enter in service mode,select sistem1 or 2 ,select IuU Unit,select Unit K ,select new release press start and after job is completed close the front door,turn OFF the power,wait 2 minutes and turn ON.

Feb 11, 2013 | Konica Minolta Bizhub C220 Color Copier

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Error code c25507

error code 2557 is ATDC Sensor Failure, low density

Jun 08, 2010 | Konica Minolta bizhub 350 All-In-One Laser...

4 Answers

I have a C-2557 code on a bizhub C450

interesting... this information is covered in detail in this post

Mar 13, 2010 | Konica Minolta bizhub C450P Laser Printer

1 Answer


Yes, open and close front door. And or power off both power switches. Wait ten seconds then turn it on again. The code is for the black image unit lack of toner. Check the image unit, and ensure toner is installed. Model type? would also be welcome

Jul 29, 2009 | Office Equipment & Supplies

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I ran out of toner and recieved code c 2557. I have replaced the toner and I am still getting this code?

this due to less toner in developer try to off and on several times if it happen again need to replace developer

May 29, 2009 | Konica Minolta bizhub C250 All-In-One...

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Konica minolta is getting error c2557, before this it was saying

c-2557 code has to do with you black toner bottle.
how handy are you?

Mar 17, 2009 | Sharp AL 800 Copier

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