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  1. #1
    SanDiegoCopierRepair.com 500+ Posts
    Konica BH 222 C2557 code

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    Konica BH 222 C2557 code

    Customer purchased drum unit and starter but not dv unit. Installed items and copier worked fine for a few months but then got the 2557 code.
    Replaced the drum unit and dv unit and starter as a set and ran F8. Copier worked fine for a couple of days, then coded c2557 again.
    Adjusted ATDC gain from 172 to 182 and machine started working again. Printed over a ream of paper with no issues.
    Then checked
    ATDC set 182
    ATDC Current 7.5%
    Vg Current -640v
    Vb Current -540v


    If code returns maybe itís an issue with the machine not adding enough toner. No mylar blocking toner hole in hopper an everthing looks lined up correctly. At least itís working for now and got through an entire ream. Comments appreciated.
    Anything can be made to work if you fiddle with it long enough- San Diego Copier Repair.com

  2. #2
    Senior Tech 250+ Posts ck1's Avatar
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    Re: Konica BH 222 C2557 code

    Quote Originally Posted by blazebusiness View Post
    Customer purchased drum unit and starter but not dv unit. Installed items and copier worked fine for a few months but then got the 2557 code.
    Replaced the drum unit and dv unit and starter as a set and ran F8. Copier worked fine for a couple of days, then coded c2557 again.
    Adjusted ATDC gain from 172 to 182 and machine started working again. Printed over a ream of paper with no issues.
    Then checked
    ATDC set 182
    ATDC Current 7.5%
    Vg Current -640v
    Vb Current -540v


    If code returns maybe itís an issue with the machine not adding enough toner. No mylar blocking toner hole in hopper an everthing looks lined up correctly. At least itís working for now and got through an entire ream. Comments appreciated.
    ATDC too high . try step by step adjust drop to 160 . need take time to adjust and print more copies

  3. #3
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    Re: Konica BH 222 C2557 code

    Toner is not getting into developer I have seen this issue several times years ago working on this series you need to remove toner hopper unit from belly of copier couple of hidden screws accessed from back of machine vacuum out sub hopper clean or replace sensor or magnet switch if still available. Its a big job to get to it . May need to replace the developer powder again to recover from code be sure toner bottle is full it will take time to refill hopper.

  4. #4
    SanDiegoCopierRepair.com 500+ Posts
    Konica BH 222 C2557 code

    blazebusiness's Avatar
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    Re: Konica BH 222 C2557 code

    Quote Originally Posted by Bliki BZ View Post
    Toner is not getting into developer I have seen this issue several times years ago working on this series you need to remove toner hopper unit from belly of copier couple of hidden screws accessed from back of machine vacuum out sub hopper clean or replace sensor or magnet switch if still available. Its a big job to get to it . May need to replace the developer powder again to recover from code be sure toner bottle is full it will take time to refill hopper.
    Sounds like the right advice............I suspected this was a toner supply issue. Thanks to all for the replies.
    Anything can be made to work if you fiddle with it long enough- San Diego Copier Repair.com

  5. #5
    Service Manager 1,000+ Posts
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    Re: Konica BH 222 C2557 code

    Toner bottle solenoid not firing or sticking.

  6. #6
    Field Supervisor 500+ Posts Woxner's Avatar
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    Re: Konica BH 222 C2557 code

    did you reset the drum and dev counts before you ran f8? also at this age the foam on the toner solinoids are gummy.never seen a sub hopper problem in all my years. but can happen

  7. #7
    KonicaMinolta Senior Tech 100+ Posts srvctec's Avatar
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    Re: Konica BH 222 C2557 code

    My guess is that it's the stupid sponge KM put on the solenoids in the toner hopper add assy. The sponge on each of the 2 solenoids will fail and all that's left is the sticky adhesive, causing the machine to add toner all the time, which is why increasing the ATDC value temporarily fixes it. Remove the toner hopper/bottle drive assy and clean off the sponges of each solenoid. Pro tip- put some mylar, 2 or 3 layers thick on where the sponges were, otherwise the solenoid flapper will magnetically stick to the solenoid frame. Ask me how I know. Been fixing 350 series and later like this for many years.
    Started in the copier service business in the fall of 1988 and have worked at the same company since then, now a senior tech, since 2006.

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