The error code appearing on our bizhub250 is c2557

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

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

Internal power supply need checkup to insure satisfactory power and stability

C2557 ATDC Sensor Failure
• The scanning value of the ATDC Sensor is less
than 7 % while the IU Motor is turning.
• The scanning value of the ATDC Sensor is more than 19 % while the IU Motor is turning.

This is form the service manual, The meaning is developer material or the worst case you should change the entire ATDC sensor.

Error code c2557 means "ATDC Sensor abnormality".

It appears due to following reasons,

1-Imaging unit (Drum unit) parts life is expired,

2-Developer's life is expired,.

3-Developer tank is hard, gears of the unit are not moving

.

For best results and smooth functioning of machine, simply call your technical services representative and he will help you in this matter.

OR

if you want to do it yourself, you have to do this.

1-Press "UTILITY/COUNTER' button on the machine's panel.

2-Now press "check details" button. (appeared on the lcd screen)

3-Now press these buttons,

STOP+0+0+STOP+0+1

4-now press "Tech representative choice" button on LCD screen.

5-now press "PRINTER" button.

6-press "ATDC GAIN"

7-Now press the "c" button to clear the value, after clearing the value enter new value by using numeric pad.

Enter new value by adding 10 to the previous value. For example if the previous value was 150 you have to enter 160 now or 165.

8-Enter the new value and press the End button on the LCD screen and exit.

9-Now restart the machine..

ADTC sensor failure

hi U can see trouble list [utility +meter counter +stop 00 stop 01 +counter+trouble] U see all error

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.