Question about Konica Minolta bizhub 250 All-In-One Laser Printer

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Our bizhub-250 receives a C2557, need help with service mode

Yesterday I changed the drum and developer unit of the machine. The very last step involved performing an ATDC adjustment. For instructions I was refered to another manual which said I needed to go into Tech. Rep. Mode ((I believe that this may be the same as the service mode that people are refering to when discussing a C2557). For that I was refered to the service manual, which wasn't available anywhere. I decided to go right ahead and test the printer anyway, at which point I received a malfunctions-error C2557 and realized my error. If anyone knows where I can find a copy of the service manual or can tell me how to go into Tech. Rep. Mode or service mode I would be more than appreciative.

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  • DMenscha Jan 27, 2009

    My machine says


  • bengumay Feb 04, 2009

    atdc c2557 how to reset this problem, pls help

  • Anonymous Mar 28, 2014

    tech rep mode


6 Answers

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Utility/Counter -> Details -> [STOP][0][0][STOP][0][1]
Go to counter and clear the life of the developer and drums and then run F8 from functions.

Reset your Toners and Imaging units for Minolta Bizhub and CF series.

Posted on Sep 03, 2009

  • ozzie espinoza
    ozzie espinoza May 15, 2014

    This only works for the older models new models completeley different.


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I have the same problem with error code c 037 ( Konika Minolta Bizhaub 350 )

Posted on May 19, 2011

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You need to replace the drum and developer, then reset the drum and developer counters and f-8 the developer this is all done in the tech rep mode

Posted on Aug 26, 2009

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  • ejcm40 Aug 26, 2009

    1. press the Utlility/Counter key

    2. touch [check Details]

    3. press the following keys in this order


    4. enter the eight-digit code

    00000000 then touch end

    this puts you in the tech rep mode screen

  • John La Jul 19, 2012

    Is this the same method to enter the tech mode for the NEC IT2530D?

  • haseeb iqbal Apr 29, 2013

    toner problem 2557 error tcr ad


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I have the same problem with error code c-2557

Posted on Apr 06, 2010

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I have the same problem with error code c-2557 in Konica Minolta C353 laser color printer/copier. Please provide the solution. I have switched it off 3-4 times and on after 10 mins but still have the same problems.

Posted on Jan 06, 2010

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C2557 is ATDC sensor failture, first check the level history in service mode,
press utility/counter, stop-0-0-stop-0-1, press the password, "00000000"
and the press level history, normally, atdc sensor have around 5.0%-7.0%,
if less or more than the presentase, the machine will appear code C2557.
1. change the adtc sensor gain.
in the service mode, press tech.rep.choice-printer-atdc sensor gain, set the value around 0-255, with the persentase 5.0%-7.0%
2. if the panel warning please exchange pc drum, print dirty, blur or dirty better ur change the drum, developer and transfer roller one go.
before u change the drum, developer and transfer roller, make sure u reset the counter,
in service mode, press counter-special parts counter, select the pc life and the press key c. select maintenance counter and reset also.
after u change the spare parts, do f8 quickly, in service mode
press function-F8, the machine will automaticly run and adjust atdc sensor.
if all already finish, off the machine and wait 10 second and the on again.

i hope this can help u solve ur problem,
regards, ^^,

Posted on Oct 11, 2012

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