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  1. #1
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    bizhub c250i annoying noises from the power supply

    I wanted to ask if anyone else has the same problem with the power supplies. After the device switches to standby, the power supply makes really annoying noises.
    I just unboxed 3 new c250i and the same on all of them.

  2. #2
    Service Manager 2,500+ Posts
    bizhub c250i annoying noises from the power supply


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    Re: bizhub c250i annoying noises from the power supply

    Buzzing from the power supply has been an on going issue since the C220 series. It's from the fuser lamp turning on and off. This is one of those issues that Kon/Min never fixed. Add it to their noisey fusers, etc that are carried over from old models to the new models, year after year!
    Not sure with the newer models but there were bulletins about this issue. Really didn't help much. Might be able to change energy save settings, etc to quiet down?

  3. #3
    Senior Tech 250+ Posts jotunn's Avatar
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    Re: bizhub c250i annoying noises from the power supply

    Yes, today we've met such machine.

    Unfortuantely, the old way to deal with annoying PSU noises (Heater Control Level setting) won't work in those machines anymore.
    In earlier machine models such as the C308 this setting was set by factory to "Level 2" so you could rise this setting to reduce noises, but now this setting is already set to "Level 4" and there is no place for further changes.

  4. #4
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    Re: bizhub c250i annoying noises from the power supply

    The buzzing humming noise from the c220/224/258 wasn't constantly audible but this high-frequency, permanent up and down modulating tone is permanent 24/7.

    I have attached a sound sample. There's a concert in the showroom when I leave all three devices running. It's louder live than on the video.


    I can't imagine that your customers would accept this if the device was nearby in the office.
    Last spring I received a delivery containing 2-3 devices out of 20 pieces. I replaced the PSU and after that I couldn't hear any more noise. I thought these were isolated cases. But now... I opened a ticket...

  5. #5
    Service Manager 5,000+ Posts tsbservice's Avatar
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    Re: bizhub c250i annoying noises from the power supply

    This is so brutal can't believe anyone would accept it. Chinese must be dead drunk making that batch of power supplies. Claim them all.
    A tree is known by its fruit, a man by his deeds. A good deed is never lost, he who sows courtesy, reaps friendship, and he who plants kindness gathers love.

    Blessed are they who can laugh at themselves, for they shall never cease to be amused.

    I don't reply to private messages from end users.

  6. #6
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    bizhub c250i annoying noises from the power supply


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    Re: bizhub c250i annoying noises from the power supply

    If you set Power Consumption in sleep mode to DISABLED does it help?

  7. #7
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    Re: bizhub c250i annoying noises from the power supply

    Quote Originally Posted by rrrohan View Post
    If you set Power Consumption in sleep mode to DISABLED does it help?
    No it does not help, I have already tested it because I configure all devices with this setting.

    I have now ordered 3 PSUs. I replaced 2 of them and the devices are now completely silent and one PSU is defective because the machine does not start.
    This shows the quality of these components.

  8. #8
    Service Manager 1,000+ Posts
    bizhub c250i annoying noises from the power supply


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    Re: bizhub c250i annoying noises from the power supply

    ive had graphics cards do capacitor whine.

    often adding hot glue to the offending cap has helped

  9. #9
    Service Manager 1,000+ Posts
    bizhub c250i annoying noises from the power supply


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    Re: bizhub c250i annoying noises from the power supply

    or just disable sleep mode via service mode. i used to do that on 4 series when the resuming from sleep bug was a thing

  10. #10
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    bizhub c250i annoying noises from the power supply


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    Re: bizhub c250i annoying noises from the power supply

    Quote Originally Posted by occus View Post
    No it does not help, I have already tested it because I configure all devices with this setting.

    I have now ordered 3 PSUs. I replaced 2 of them and the devices are now completely silent and one PSU is defective because the machine does not start.
    This shows the quality of these components.
    Ouch! Not very reassuring about these new Kon Min "i" models. They are going down hill fast! This is exactly why I will sell off lease "8" series as long as available.

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