Thanks Thanks:  0
Likes Likes:  0
Dislikes Dislikes:  0
Page 1 of 2 12 LastLast
Results 1 to 10 of 17
  1. #1
    Technician
    Join Date
    Nov 2012
    Posts
    14
    Rep Power
    10

    MPC-4500 Yellow printing only on 1/4 of the page

    From what I have read here, there might be a couple different possible problems:

    1) PCU
    2) Transfer Belt tension
    3) Dirty laser shield glass

    The PCU's in this one have been replaced with a generic model from a previous owner, so they are not color specific. And its not obvious to me that the transfer belt tension is way off (stepped through the service manual on this, but it seems set by a compression spring to determined tension)

    Before I swap the PCU - something else I should be trying first?


  2. #2
    The New Guy 1,000+ Posts ruben's Avatar
    Join Date
    Oct 2012
    Location
    Bristol, UK
    Posts
    1,184
    Rep Power
    42

    Re: MPC-4500 Yellow printing only on 1/4 of the page

    What happens if you print a sky-shot with background colour set to yellow? Does the colour just suddenly stop, does it gradient out or does it stop and start several times?


  3. #3
    AutoMajical Resolutionist 2,500+ Posts
    MPC-4500  Yellow printing only on 1/4 of the page

    Tonerbomb's Avatar
    Join Date
    Feb 2005
    Location
    Bugaha
    Posts
    2,584
    Rep Power
    77

    Re: MPC-4500 Yellow printing only on 1/4 of the page

    sounds like a charge roller may not be completely seated in the PCU.

    Mystic Crystal Revelations

  4. #4
    Field Supervisor 500+ Posts
    Join Date
    Apr 2010
    Location
    the west
    Posts
    541
    Rep Power
    23

    Re: MPC-4500 Yellow printing only on 1/4 of the page

    check the rollers on the ITB. last time i had this same issue, one of the rollers had popped out of it's bracket.


  5. #5
    Field Supervisor 1,000+ Posts Debs1964's Avatar
    Join Date
    Oct 2010
    Location
    Gravesend, Kent
    Posts
    1,499
    Rep Power
    52

    Re: MPC-4500 Yellow printing only on 1/4 of the page

    Quote Originally Posted by Tonerbomb View Post
    sounds like a charge roller may not be completely seated in the PCU.
    I'd have thought if the charge roller wasn't clipped in you'd get an SC code, or dark copies.
    Sounds like a dirty laser slit glass or contaminated doctor blade in the dev unit to me


  6. #6
    Ricoh tech 100+ Posts
    MPC-4500  Yellow printing only on 1/4 of the page

    collme's Avatar
    Join Date
    Apr 2010
    Location
    huddersfield
    Posts
    221
    Rep Power
    21

    Re: MPC-4500 Yellow printing only on 1/4 of the page

    Quote Originally Posted by jonhiker View Post
    check the rollers on the ITB. last time i had this same issue, one of the rollers had popped out of it's bracket.
    Quote Originally Posted by Debs1964 View Post
    I'd have thought if the charge roller wasn't clipped in you'd get an SC code, or dark copies.
    Sounds like a dirty laser slit glass or contaminated doctor blade in the dev unit to me
    I would agree with both of these solutions. if charge roller is not fully clipped into place you will get heavy background from that pcu as Debs says so either tension roller under itb belt for yellow pcu has dropped out of position or slit glass would be my first checks. both easy to check before going for 3rd option of dev unit doc blade.


  7. #7
    Technician
    Join Date
    Sep 2009
    Location
    Sheffield, Ma.
    Posts
    36
    Rep Power
    17

    Re: MPC-4500 Yellow printing only on 1/4 of the page

    If the problem only presents itself on yellow replaced PCU unit


  8. #8
    AutoMajical Resolutionist 2,500+ Posts
    MPC-4500  Yellow printing only on 1/4 of the page

    Tonerbomb's Avatar
    Join Date
    Feb 2005
    Location
    Bugaha
    Posts
    2,584
    Rep Power
    77

    Re: MPC-4500 Yellow printing only on 1/4 of the page

    Quote Originally Posted by Debs1964 View Post
    I'd have thought if the charge roller wasn't clipped in you'd get an SC code, or dark copies.
    Sounds like a dirty laser slit glass or contaminated doctor blade in the dev unit to me
    Sometimes you'll get the sc code sometimes you get solid toner coverage on 1 side. The dirty slit glass won't do this as the laser would have to wright the all dark image, and a dirty glass gives less laser light making the image lighter. Bad DV unit could also be the cause.

    Mystic Crystal Revelations

  9. #9
    Technician
    Join Date
    Sep 2009
    Location
    Sheffield, Ma.
    Posts
    36
    Rep Power
    17

    Re: MPC-4500 Yellow printing only on 1/4 of the page

    ​If you can make a good blacktop me you can make a good magenta copy and you can make a good cyan copy that is the yellow unit this is not rocket science


  10. #10
    Ricoh tech 100+ Posts
    MPC-4500  Yellow printing only on 1/4 of the page

    collme's Avatar
    Join Date
    Apr 2010
    Location
    huddersfield
    Posts
    221
    Rep Power
    21

    Re: MPC-4500 Yellow printing only on 1/4 of the page

    Quote Originally Posted by Phil the copy guy View Post
    ​If you can make a good blacktop me you can make a good magenta copy and you can make a good cyan copy that is the yellow unit this is not rocket science
    maybe not. the itb has 4 rollers inside that press the belt against the drums, these have dropped out at one end before giving part copies on 1 colour but good copies on the other 3. so check itb before buying and fitting a dev unit and/ or drum unit.


Tags for this Thread

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