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

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Konica/Minolta biz 350 C2557 after replacing DV unit and drum F8

I replaced DV unit and drum for konica/monolta bizhub 350 ran F8 and when finished made a copy it jammed at fuser and came up with error C2557 and so I pulled out jam turned machine off and on and the error came up before warm up, but when I put the old DV unit and drum back in copier the error goes away and it makes copies just fine. I also put in the new DV unit and drum in another machine and the error code persists in the other copier as well.  any suggestios?...

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  • gmatthews_la Apr 22, 2009

    this is the 3rd dv unit i've gone thru.

  • Rawl Coulton
    Rawl Coulton Jul 29, 2015

    Problem is not DV unit. Toner supply solenoid is stuck. Disassemble toner drive unit and service/replace both bottle and feed solenoid. Warning: this is no easy job. You will have to manually replenish toner hopper then "help" the machine to recapture the gain setting.

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  • Konica Minolta Expert
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Tha minolta di3510 developer unit looks the same as the unit for the konica minolta bizhub 350 but the toner sensor in the minolta unit uses a different voltage range for the toner sensor and it will throw this code make sure you have the correct unit for this machine also you can try this
go back into tech rep mode and change these settings:
select tech rep choice mode
select printer tab
select atdc sensor gain
set the value to about 165
then back all the way out to the ready screen and power the machine off then back on and replenish toner in the user management screen.

Posted on Nov 05, 2011

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  • Contributor
  • 628 Answers

Obviously the dv unit is defective. Can you return it to the store for another?

Posted on Apr 22, 2009

  • Joe Fine Apr 22, 2009

    Are you sure you have the correct dv unit? It's odd that your machine and the others reject it.The other machine you mentioned--is it the same model?

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SOURCE: Solution for error code c2557 konica minolta bizhub 250 machine

ADTC sensor failure

Posted on Aug 07, 2010

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