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  1. #1
    Junior Member
    Join Date
    Oct 2016
    Location
    Bellingham
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    2
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    Unhappy e-Studio 3540C C970 error

    Unable to resolve C970 error.
    Have thoroughly examined all of the charge assemblies, replaced the grids and sawtooth - inspected the posts to make sure they're not broken
    - replaced HV unit
    - replaced all 4 drums
    - replaced transfer belt (it was well worn)
    - thoroughly cleaned the machine

    Still has C970 and a patch of toner on the black drum immediately after warmup
    Running out of ideas without stripping the machine and examining the wiring from the HV board

    Thoughts?

  2. #2
    Senior Tech 100+ Posts
    Join Date
    Jun 2016
    Posts
    116
    Rep Power
    17

    Re: e-Studio 3540C C970 error

    When dealing with C970, I often check the main charger unit, check any burn mark on the front & rear terminal, sometime the charger rod cleaner also will cause charging issue, where u can try to remove it for testing.

    Since u are having issue on k process unit only, what u can do is to swap the drum unit with 1 of the color process unit and see. If the C970 follow, then confirm is main charger issue. If not, then might be other issue...

  3. #3
    Junior Member
    Join Date
    Mar 2018
    Location
    Tinley Park
    Posts
    1
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    0

    Re: e-Studio 3540C C970 error

    replaced the main charge unit assy. Most likely it's arching somewhere.

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