Page 1 of 2 12 LastLast
Results 1 to 10 of 13
  1. #1
    Senior Tech 100+ Posts
    Join Date
    Mar 2009
    Location
    Saint Louis, MO
    Posts
    241
    Rep Power
    40

    Yellow blotches from a MP C3003 revisited

    So I posted a couple of days ago and screwed up by ending the title in "print" and it screwed the whole thread up.

    For those that didn't see it, I had posted a question about trying to figure out why a MP C3003 might be putting yellow blotches on the paper across the center (paper feed direction). Developer is clearly on the paper as well and if you check, the yellow PCDU has developer sitting on top of it on the left hand side above the developer unit. The transport belt drags it across the other PCDU's as well. I have had this situation once and replaced the entire yellow PCDU which seemed to fix the issue. (That was over 6 months ago and have heard nothing from that machine). I had two do it in two days so I replaced the yellow PCDU again on both machines. Except it didn't fix it this time. Originally, I thought developer was spewing up on the top of the development unit through the slit where you pull the mylar out for a new developer unit so I taped across the middle of it. That has appeared to fix one of them as I have not heard back on it, but have not had a chance to go check it. In all cases, I had wound up replacing the yellow PCDU because the drum surface was just heavily worn and grooved.

    The last machine did the immediate blotching again. I did some other research including posting here and found a tid bit someplace about the transfer unit. Another tech and I went out to visit the machine and sure enough we found an issue with the ITB unit.

    The issue is the metal roller on the left hand side (the roller right before the yellow PCD) was totally seized up. When we turned the belt by hand, it would still turn however and the belt would just slip over the roller. The issue is that roller is on a pivot point like the transfer rollers above each PCDU. When you manually actuate the rollers to drop down for when a color print is made, they all work and this metal roller also drops down as well. The issue is that with it not turning and the belt sliding over the top, the belt forces it even lower. This causes the belt to drag across the top of the yellow PCDU and be in contact with the top of it. This is too close and the transfer roller is also too close above the yellow PCDU. This causes too much pull to the belt and apparently drags developer out of the PCDU instead of just drawing the toner across to the belt. We took the roller out, cleaned the bushings and lubed them and put it all back together. Machine ran fine after that.

    According to the person who posted the tidbit of information, they have had to do this a couple of times.

    At any rate, I apologize for the screw up on the other post and hopefully this information comes in handy for someone in the future.

  2. #2
    Retired 10,000+ Posts
    Yellow blotches from a MP C3003 revisited

    slimslob's Avatar
    Join Date
    May 2013
    Location
    Bakersfield, CA
    Posts
    34,131
    Rep Power
    989

    Re: Yellow blotches from a MP C3003 revisited

    Dirty charge roller. Excessive wear on the lube bar.

  3. #3
    Senior Tech 100+ Posts
    Join Date
    Mar 2009
    Location
    Saint Louis, MO
    Posts
    241
    Rep Power
    40

    Re: Yellow blotches from a MP C3003 revisited

    Quote Originally Posted by slimslob View Post
    Dirty charge roller. Excessive wear on the lube bar.
    Are you referring to why the yellow drum had heavy wear on it or other possible explanations behind the yellow blotching?

    The drum I replaced had 124K on it, which is nothing for a 3 series color drum. It also doesn't explain why the machine continued with the yellow blotching with developer on the paper even after I replaced the entire PCDU.

    What I need to do is get back and visit the other machine I was having issues with and check it out. When I ever get a chance to do that, I will and then also report my findings here as well.

  4. #4
    Senior Tech 100+ Posts
    Join Date
    Mar 2009
    Location
    Saint Louis, MO
    Posts
    241
    Rep Power
    40

    Re: Yellow blotches from a MP C3003 revisited

    Somewhat sorry for digging this thread up, but considering I have had a lot of ITB unit issues the last 2 weeks, maybe it is appropriate. Thanks Sandmanmac for the likes on this one to get my attention back to it.

    The second machine was fixed by cleaning and lubing the idler roller bushings.

    I have had this issue crop up a fair amount this past year with these ITB units as they get older. The symptoms can be quite broad and yet the issue is the same with the idler roller to the left of the yellow transfer roller. Machines will exhibit some of the symptoms below in addition to the blotching mentioned above with the original issue, but it can vary from machine to machine and also depend on if the roller is totally locked up or just hard to turn.

    Intermittently noisy (squeeks from the left side), be noisy most of the time, have a yellow haze across the print or yellow blotches in certain parts of the print, go through a bottle of yellow toner every 5 days, etc. If you pull the ITB unit out and look at the tops of the PCU's and have yellow going across them, then that roller is suspect.

  5. #5
    Copier Technician 1,000+ Posts
    Yellow blotches from a MP C3003 revisited

    mga's Avatar
    Join Date
    Dec 2010
    Location
    london
    Posts
    1,393
    Rep Power
    135

    Re: Yellow blotches from a MP C3003 revisited

    Quote Originally Posted by Klydon View Post
    Somewhat sorry for digging this thread up, but considering I have had a lot of ITB unit issues the last 2 weeks, maybe it is appropriate. Thanks Sandmanmac for the likes on this one to get my attention back to it.

    The second machine was fixed by cleaning and lubing the idler roller bushings.

    I have had this issue crop up a fair amount this past year with these ITB units as they get older. The symptoms can be quite broad and yet the issue is the same with the idler roller to the left of the yellow transfer roller. Machines will exhibit some of the symptoms below in addition to the blotching mentioned above with the original issue, but it can vary from machine to machine and also depend on if the roller is totally locked up or just hard to turn.

    Intermittently noisy (squeeks from the left side), be noisy most of the time, have a yellow haze across the print or yellow blotches in certain parts of the print, go through a bottle of yellow toner every 5 days, etc. If you pull the ITB unit out and look at the tops of the PCU's and have yellow going across them, then that roller is suspect.
    replace with NEW dev assy
    Regards Mark

    FOR TRADE AND END USER SERVICE CALLS PLEASE VISIT WEB SITE FOR CONTACT DETAILS. COVERING GREATER LONDON {UK} AND ALL SURROUNDING COUNTIES.

    RICOH, CANON, KYOCERA, KONICA, SHARP, HP/SAMSUNG BROTHER, LEXMARK.

    https://copierservices.simdif.com

  6. #6
    Service Manager 2,500+ Posts
    Yellow blotches from a MP C3003 revisited

    sandmanmac's Avatar
    Join Date
    Feb 2009
    Location
    Toronto, ON
    Posts
    3,885
    Rep Power
    159

    Re: Yellow blotches from a MP C3003 revisited

    Quote Originally Posted by Klydon View Post
    Somewhat sorry for digging this thread up, but considering I have had a lot of ITB unit issues the last 2 weeks, maybe it is appropriate. Thanks Sandmanmac for the likes on this one to get my attention back to it.
    You're welcome! Thank you for posting it in the first place.
    Customer showed me a couple of samples a few days ago, but machine was working fine when arrived, so I told them to let me know if/when it came back, which it did a couple of days later.
    I'd never seen an issue quite like it before, and had no idea what would cause it at the time.
    I did a quick google search, and your post couldn't have described the symptoms of their issue any better.
    Sure enough, the roller was seized up completely to where I could just barely turn it.
    Saved a bunch of time (and money) for both me and the customer!

  7. #7
    Service Manager 1,000+ Posts fshead's Avatar
    Join Date
    Jan 2009
    Location
    nyc
    Posts
    2,339
    Rep Power
    80

    Re: Yellow blotches from a MP C3003 revisited

    Quote Originally Posted by Klydon View Post
    Somewhat sorry for digging this thread up, but considering I have had a lot of ITB unit issues the last 2 weeks, maybe it is appropriate. Thanks Sandmanmac for the likes on this one to get my attention back to it.

    The second machine was fixed by cleaning and lubing the idler roller bushings.

    I have had this issue crop up a fair amount this past year with these ITB units as they get older. The symptoms can be quite broad and yet the issue is the same with the idler roller to the left of the yellow transfer roller. Machines will exhibit some of the symptoms below in addition to the blotching mentioned above with the original issue, but it can vary from machine to machine and also depend on if the roller is totally locked up or just hard to turn.

    Intermittently noisy (squeeks from the left side), be noisy most of the time, have a yellow haze across the print or yellow blotches in certain parts of the print, go through a bottle of yellow toner every 5 days, etc. If you pull the ITB unit out and look at the tops of the PCU's and have yellow going across them, then that roller is suspect.
    AS a rule when i get any dirty 03 units even with low count i pull drums,ITB unit and pull the cleaning unit too.
    It is amazing the crap that you will find,dog/cat hair,small pieces of paper and just dirt..
    When doing that i always blow out and clean/separate that foam roller and ck all bearings etc..
    If i think cleaning unit is beat up i just pop in a new one..too much to lose with a dirty beat up unit...
    still think these are a SOLID BOX..

  8. #8
    Trusted Tech
    Yellow blotches from a MP C3003 revisited

    cadillac2's Avatar
    Join Date
    Oct 2015
    Posts
    42
    Rep Power
    19

    Re: Yellow blotches from a MP C3003 revisited

    Quote Originally Posted by sandmanmac View Post
    You're welcome! Thank you for posting it in the first place.
    Customer showed me a couple of samples a few days ago, but machine was working fine when arrived, so I told them to let me know if/when it came back, which it did a couple of days later.
    I'd never seen an issue quite like it before, and had no idea what would cause it at the time.
    I did a quick google search, and your post couldn't have described the symptoms of their issue any better.
    Sure enough, the roller was seized up completely to where I could just barely turn it.
    Saved a bunch of time (and money) for both me and the customer!
    could it be that the seizing of the idler roller is somehow caused by a worn out ITB cleaning units? They are good for 300k, but as you know, changing them is a little more involved on the 03's, compared to older models - so maybe they are getting skipped here and there?

  9. #9
    Senior Tech 100+ Posts
    Join Date
    Mar 2009
    Location
    Saint Louis, MO
    Posts
    241
    Rep Power
    40

    Re: Yellow blotches from a MP C3003 revisited

    Quote Originally Posted by cadillac2 View Post
    could it be that the seizing of the idler roller is somehow caused by a worn out ITB cleaning units? They are good for 300k, but as you know, changing them is a little more involved on the 03's, compared to older models - so maybe they are getting skipped here and there?
    I don't believe the age/count of the cleaning unit matters in terms of this particular roller having issues.

    The bushings are rusted a lot of times and there isn't really any lube/grease that I see in there on the ones I have taken out and fixed. I do clean them out and the early ones I was using a thin lube, but I am of a mind now that a grease may work better long term. Either way, they need some form of lube. The copy count on all of them varied from a lot (500K plus and more) to not very much (200K, but is 4+ years old, etc).

    All these machines I have had issues with are in fairly good environments (offices, etc).

    As far as the cleaning unit life goes, it is rare I change them out. Clean them out is another matter, especially on machines that do a lot of color fill. That is one of the things I try to check on most every calls on my machines that have a lot of fill. (you can do this by seeing how hard it is to turn the auger shaft on the cleaning unit. If it is harder to turn, then that means it is packed and needs to be cleaned out). I have cleaning units that have gone double yield easy with no issues and not had the roller issue either.

  10. #10
    Service Manager 1,000+ Posts Polarbear's Avatar
    Join Date
    Feb 2012
    Location
    Cape Town
    Posts
    1,070
    Rep Power
    45

    Re: Yellow blotches from a MP C3003 revisited

    Hi all

    you guys are lucky that the seized roller shaft did not cause the belt to snap. I have had that before.

    We could not understand what broke the belt until i discovered the seized shaft...
    Press the GREEN button!!

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