Thanks Thanks:  0
Likes Likes:  0
Dislikes Dislikes:  0
Page 1 of 2 12 LastLast
Results 1 to 10 of 12
  1. #1
    Senior Tech 100+ Posts
    Bizhub c451 imaging unit printing faint

    Lasersupplies's Avatar
    Join Date
    Jul 2011
    Location
    UK
    Posts
    220
    Rep Power
    0

    Bizhub c451 imaging unit printing faint

    IMG_1244.jpg

    Hi All

    I have a bizhub c451 cyan imaging unit that is showing up as half full but the printouts are coming out faded I have printed a graduation test in the attached photo. Would anyone know why this is happening.

    This leads me to my second question can these imaging units be remanufactured and if so has anyone got instructions.

    Thanks

  2. #2
    Field Supervisor 500+ Posts Zeldaman's Avatar
    Join Date
    Mar 2011
    Location
    Stuttgart/Baden Wuerttemberg
    Posts
    942
    Rep Power
    47

    Re: Bizhub c451 imaging unit printing faint

    Hi there!
    Try to glue some patches of the spare-PH-cleaner pads on the black rubber(?) at the blue holding-lever (best on all blue levers), and look if some of the developer is on the base-plate over the ph-unit.Also clean the scorotron-grid.
    Sorry, but i donīt know if its possible to remanufacter them.
    Greetings...

  3. #3
    Senior Tech 100+ Posts
    Bizhub c451 imaging unit printing faint

    Lasersupplies's Avatar
    Join Date
    Jul 2011
    Location
    UK
    Posts
    220
    Rep Power
    0

    Re: Bizhub c451 imaging unit printing faint

    Thanks for the suggestion but it did not work, any other ideas? Thanks

  4. #4
    Trusted Tech 50+ Posts MAD0RAM's Avatar
    Join Date
    Oct 2012
    Location
    Delaware
    Posts
    82
    Rep Power
    24

    Re: Bizhub c451 imaging unit printing faint

    This looks to me like a failed IU At best you could try a toner add to see if it would fill the blanks but it will not last.

    The fix for this I am afraid is a new IU.

  5. #5
    Senior Tech 100+ Posts Dickie's Avatar
    Join Date
    Nov 2011
    Location
    Leicester
    Posts
    187
    Rep Power
    27

    Re: Bizhub c451 imaging unit printing faint

    IU has failed. It has either dumped or used the developer. Have seen a few of these and never found a cause on the machine, it is just down to a faulty IU

  6. #6
    Senior Tech 100+ Posts
    Bizhub c451 imaging unit printing faint

    Lasersupplies's Avatar
    Join Date
    Jul 2011
    Location
    UK
    Posts
    220
    Rep Power
    0

    Re: Bizhub c451 imaging unit printing faint

    THanks for your replies I had feared this but was hopin there was a work around, I am tired of year machines so expensive when a iu fails. What is the most economical yet hard working a3 colour machine about (at an affordable price obviously!) thanks

  7. #7
    Partner in crime 100+ Posts Avskrap's Avatar
    Join Date
    Jul 2011
    Location
    Stockholm
    Posts
    160
    Rep Power
    30

    Re: Bizhub c451 imaging unit printing faint

    Wear and tear. Nothing extraordinary. Replace the IU with a new one and you're good to go. They're not made to be rebuilt.

  8. #8
    Service Manager 5,000+ Posts
    Bizhub c451 imaging unit printing faint


    Join Date
    Jan 2006
    Location
    Las Vegas, NV
    Posts
    9,940
    Rep Power
    154

    Lightbulb Re: Bizhub c451 imaging unit printing faint

    This Parts & Service Manual can now be purchased for $12.77 and downloaded immediately after payment from:


    Just Manuals, The Internet's largest selection of manuals ~ Instant Downloads


    Paul@justmanuals.com

  9. #9
    Step aside, noob 1,000+ Posts EarthKmTech's Avatar
    Join Date
    May 2009
    Location
    Gigety
    Posts
    2,142
    Rep Power
    75

    Re: Bizhub c451 imaging unit printing faint

    Quote Originally Posted by Lasersupplies View Post
    IMG_1244.jpg

    Hi All

    I have a bizhub c451 cyan imaging unit that is showing up as half full but the printouts are coming out faded I have printed a graduation test in the attached photo. Would anyone know why this is happening.

    This leads me to my second question can these imaging units be remanufactured and if so has anyone got instructions.

    Thanks
    Theres a few reasons why colour imaging units fail on these machines.

    yellow usually fails if the transfer belt cleaning section is leaking or if the black imaging unit is tracking developer. Looking in under the IU into the charge section will reveal the cause of that one, brown filth contamination = transfer belt is the cause, black filth contamination = black imaging unit is the cause.

    on the other colour imaging units they can also be destroyed by the black imaging unit or imaging unit next to it on the left, but yellow is usually first. If its not contamination of the charge unit and subsequent over compensation by the machine and developer stripping, it will be developer pushing against the antiscatter mylar in the colour imaging unit and pushing it against the dev roller - it then scoops the developer off presenting the familiar gritty coloured lines on the pages, eventually depleting the developer and ruining the imaging unit.

    moral of the story, find the cause and fix it rarely do they fail with no reason, but when they do its usually the antiscatter mylar because its made of a crap material that develops a memory and comes too close to the developing roller.

    I've fixed my fair share of "failed" iu's when the customer doesnt have a new one to replace it with. I still tell them to replace the ones at fault when they come in.

  10. #10
    Technician Ray G.'s Avatar
    Join Date
    Sep 2008
    Location
    Grand Junction
    Posts
    22
    Rep Power
    32

    Re: Bizhub c451 imaging unit printing faint

    I'm presently battling a KM C650 with that same problem, but all colors are weak. I noted that the latent image on the X-fer belt is full, but cannot get all of image transfered to paper. I have replaced all IU's, X-fer belt and roller, PRCB, HVPS-2 and checked sontinuity on wire harness. At my witts end right now. Have absolutely no idea what's going on. Any new ideas?

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Get the Android App
click or scan for the Copytechnet Mobile App

-= -= -= -= -=


IDrive Remote Backup

Lunarpages Internet Solutions

Advertise on Copytechnet

Your Link Here