Page 1 of 2 12 LastLast
Results 1 to 10 of 14
  1. #1
    Technician AKSturb01's Avatar
    Join Date
    Jul 2009
    Location
    Massachusetts, USA
    Posts
    27
    Rep Power
    30

    Konica Minolta Bizhub 363 B/W Image Vertical Banding Smudging

    Hello everyone,

    I have a Bizhub 363 black and white machine and I'm having an image issue. If you view the attached photos, what is happening is that narrow vertical "smudge" bands are appearing on almost every print. The the font in the scans is 12 point and you can see the banding is restricted to about 1.5 character widths. Then it goes away for a while...the paper advances...and a a new band shows up.

    They seem to be RANDOMLY spaced. Every so often a page will not have them, but most of them do. The horizontal spacing across the page, but they are always top to bottom in a single tight line. Sometimes they're less than an inch apart, sometimes 5 to 6 inches or more (see photo 2). The toner seems to be "bunching up" in those areas, as though maybe the paper isn't feeding evenly through the imaging section? You can see that the white space areas between the lines of text are not affected.

    I got this machine from a client who didn't need it any longer and they hadn't used it in about six months, but it appears to be in very good condition and it prints very well otherwise. I just don't know what to make of the vertical banding. It isn't throwing any codes or making any strange noises.

    I'd be very grateful to anyone who can point me in the right direction.

    Thank you!KONICA_363_IMAGE_DEFECT.jpgKONICA_363_IMAGE_DEFEFCT_PHOTO2.jpg

  2. #2
    Service Manager 5,000+ Posts tsbservice's Avatar
    Join Date
    May 2007
    Posts
    7,077
    Rep Power
    344

    Re: Konica Minolta Bizhub 363 B/W Image Vertical Banding Smudging

    Good samples. Looks like your developer unit spacers/roll guides may have been worn-out.
    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.

  3. #3
    Master Of The Obvious 10,000+ Posts
    Konica Minolta Bizhub 363 B/W Image Vertical Banding Smudging

    blackcat4866's Avatar
    Join Date
    Jul 2007
    Location
    Lapeer, Michigan
    Posts
    22,434
    Rep Power
    462

    Re: Konica Minolta Bizhub 363 B/W Image Vertical Banding Smudging

    Definitely compressions. The image is slightly compressed in those areas as though the paper was moving slower than the drum momentarily. IIRC this machine is from the bizhub 223/423 family.

    So what do we have driving the paper in that area?:
    Vertical path clutch: maybe slipping, dragging the paper momentarily
    Registration clutch: maybe slipping, slowing the paper momentarily
    Registration rollers/bushings/bearings: worn reg reg roller or seizing bushings/bearings

    Let's assume for the moment that the drum is not rotating too fast (that would be really hard to explain).
    =^..^=
    If you'd like a serious answer to your request:
    1) demonstrate that you've read the manual
    2) demonstrate that you made some attempt to fix it.
    3) if you're going to ask about jams include the jam code.
    4) if you're going to ask about an error code include the error code.
    5) You are the person onsite. Only you can make observations.

    blackcat: Master Of The Obvious =^..^=

  4. #4
    Aging Tech 10,000+ Posts
    Konica Minolta Bizhub 363 B/W Image Vertical Banding Smudging

    copier addict's Avatar
    Join Date
    Jul 2013
    Location
    Diamond
    Posts
    11,902
    Rep Power
    322

    Re: Konica Minolta Bizhub 363 B/W Image Vertical Banding Smudging

    I agree with tsbservice. The dev spacer rollers are a weak spot on this series of machines. I replace them every time I replace drum and dev.

  5. #5
    RTFM!! 5,000+ Posts allan's Avatar
    Join Date
    Apr 2010
    Location
    Centurion
    Posts
    5,372
    Rep Power
    151

    Re: Konica Minolta Bizhub 363 B/W Image Vertical Banding Smudging

    So that is LEF, must be right?
    J3003 comes to mind. Reg clutch?? The only clutch if the vertical from tray1. By that time the feed clutches should be deactivated and the one way clutches should wheel free.
    So i agree with BC.

    Those clutches if the let go due to strain or wear they will not take again. Bad wiring to your clutch?

    Those bushings are terrible.
    The DS rolls dont last.
    And the drum gear breaks teeth that ends up every where in the main drive that makes a racket and visible jitters .

    Tip: Trim the corners of the drum drive gear to eliminate the shearing force. Do that on every drum installation. Also remove 2 turns from the spring that press the transfer roller against the drum. As mentioned change the DS rolls every dev change and the transfer roller every drum change if it shows heavy wear.
    Whatever

  6. #6
    Service Manager 2,500+ Posts
    Konica Minolta Bizhub 363 B/W Image Vertical Banding Smudging

    Hansoon's Avatar
    Join Date
    Sep 2007
    Posts
    3,187
    Rep Power
    94

    Re: Konica Minolta Bizhub 363 B/W Image Vertical Banding Smudging

    Drum spacer collars cracked. See my avatar.

    Hans
    " Sent from my Intel 80286 using MS-DOS 2.0 "

  7. #7
    Technician AKSturb01's Avatar
    Join Date
    Jul 2009
    Location
    Massachusetts, USA
    Posts
    27
    Rep Power
    30

    Re: Konica Minolta Bizhub 363 B/W Image Vertical Banding Smudging

    Thank you everyone for all the ideas and the help. Obviously I have several things to investigate and learn. Full disclosure department - I am not a technician by profession. I found this website many years ago and could tell that the signal/noise ratio was very high, which I appreciate. You also seem to have a sense of humor, which is perfect when it comes to faceplanting n00bs like myself asking questions that are above their pay grade, because you can tell already that this is gonna be fun! So thank you again.

    I run a small printing and mailing company and we do our best to repair our own machines. Much of the time we're successful, some of the time we're not. If I cannot make any headway for a reasonable amount of money and time, I will have to decide whether to sell it to someone who can hopefully make better use of it. It seems a shame to scrap something that's working well otherwise.

    My next steps are to get the service manuals and dig in.

    Is it still possible to get the parts I need, including the drum spacer collars? Are there any recommended suppliers I can buy from?

    Best regards.

  8. #8
    Technician AKSturb01's Avatar
    Join Date
    Jul 2009
    Location
    Massachusetts, USA
    Posts
    27
    Rep Power
    30

    Re: Konica Minolta Bizhub 363 B/W Image Vertical Banding Smudging

    Quote Originally Posted by Hansoon View Post
    Drum spacer collars cracked. See my avatar.

    Hans
    Now, of course, I have to find out!

    Amazing you answered. Before I wrote my post yesterday, I did some searching to at least try and see whether anyone had a similar problem and I saw your avatar in a different thread and thought: "Hmmm. I wonder if it's a worn or out-of-round bushing or bearing or something like that."

  9. #9
    RTFM!! 5,000+ Posts allan's Avatar
    Join Date
    Apr 2010
    Location
    Centurion
    Posts
    5,372
    Rep Power
    151

    Re: Konica Minolta Bizhub 363 B/W Image Vertical Banding Smudging

    Yea you will still find plenty parts around.
    You guys still did not figure out a maintenance contract is cheaper and more convenient??
    Whatever

  10. #10
    Technician AKSturb01's Avatar
    Join Date
    Jul 2009
    Location
    Massachusetts, USA
    Posts
    27
    Rep Power
    30

    Re: Konica Minolta Bizhub 363 B/W Image Vertical Banding Smudging

    Quote Originally Posted by allan View Post
    So that is LEF, must be right?
    J3003 comes to mind. Reg clutch?? The only clutch if the vertical from tray1. Those bushings are terrible. The DS rolls dont last. And the drum gear breaks teeth that ends up every where in the main drive that makes a racket and visible jitters. Tip: Trim the corners...
    Thank you for the tip. Now for the faceplanting n00b question - LEF? All that comes to my mind is "Lubricate Every Fortnight."

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