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  1. #1
    Service Manager 100+ Posts
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    Canon C1 drum question

    Its been a while, but having a image problem with the banding and rough 2" band.
    On the drums itself the side closest to the operator(knob)
    I cant remember,
    Is there supposed to be a 1/4" metal ring exposed near the edge ?

    You can see the area where the cleaner pads left & right wear on the drum
    Drum has 70K.

    What I have read here is that the drum is not discharging, causing the rough band across the
    image.
    this problem got worse very fast and the DEV units were restarted about 10K ago and work great.
    the drum surface looks fine and the image just prints with the banding issue.

    This has to be a discharge/charge problem
    No errors!
    thanks
    P

  2. #2
    Service Manager 10,000+ Posts
    Canon C1 drum question

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    Quote Originally Posted by Penvy View Post
    Its been a while, but having a image problem with the banding and rough 2" band.
    On the drums itself the side closest to the operator(knob)
    I cant remember,
    Is there supposed to be a 1/4" metal ring exposed near the edge ?

    You can see the area where the cleaner pads left & right wear on the drum
    Drum has 70K.

    What I have read here is that the drum is not discharging, causing the rough band across the
    image.
    this problem got worse very fast and the DEV units were restarted about 10K ago and work great.
    the drum surface looks fine and the image just prints with the banding issue.

    This has to be a discharge/charge problem
    No errors!
    thanks
    P
    so banding on that side runs in paper feed direction/ lead to trail edge,only in one area ?
    is it from all colors ?

    if u turn of Potential Control , will banding go away/ if so replace Drum

  3. #3
    Service Manager 100+ Posts
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    Banding runs across the page side to side, 2" wide rough area.
    drum will produce color image. some times a good image
    Banding can be multiable bands on just a few.
    Its like it has a grounding problem.
    this copier only has 70K.
    and drum was replaced now has 60K

  4. #4
    Technician
    Canon C1 drum question


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    If it's an intermittent crossfeed band and you can feel developer in the band it is usually the drum causing this. I have seen this twice now and in both instances the drum fixed it.

  5. #5
    Service Manager 100+ Posts
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    I posted pics a while back
    It first started out with just a color band
    but the Black was perfect.
    and sometimes the color image was fine.
    the drum question is the metal 1/4" exposed on the knob side.
    I cant remember if that was normal
    Customer is down on his luck and has to pay for everything.
    Just replacing expensive parts to find out is not an option.

    The drum surface is fine and the image ok but this just got worse
    overnight on the banding.
    and so far
    NO Errors!

    As I posted before the DEV units have been restarted and worked great for about 6K
    thanks for the response guys
    just trying to help out a friend in need!
    P

  6. #6
    Technician czing1's Avatar
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    tech pub

    See if this bulletin pertains to your problem
    Canon just released last week
    Attached Files Attached Files

  7. #7
    Service Manager 10,000+ Posts
    Canon C1 drum question

    teckat's Avatar
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    Quote Originally Posted by Penvy View Post
    I posted pics a while back
    It first started out with just a color band
    but the Black was perfect.
    and sometimes the color image was fine.
    the drum question is the metal 1/4" exposed on the knob side.
    I cant remember if that was normal
    Customer is down on his luck and has to pay for everything.
    Just replacing expensive parts to find out is not an option.

    The drum surface is fine and the image ok but this just got worse
    overnight on the banding.
    and so far
    NO Errors!

    As I posted before the DEV units have been restarted and worked great for about 6K
    thanks for the response guys
    just trying to help out a friend in need!
    P

    did u try to turn of potential control, like i posted ?? Try turning Potential Control off (COPIER>OPTION>BODY>PO-CNT to 0) Turning Potential Control off is for testing purposes only. If left off color accuracy will suffer and E061 will occur.

    these drums somehow become defective after a while.
    these banding issues have been an ongoing issue for a while/ read that posted pub/ rough toner surface

    is this your issue below/ you posted that issue was on op side/ now u say it is across drum ????
    2484_00111..jpg

    that pic is for lead edge to trail edge/ across drum or cross feed is something else !!!! like front to back !!

  8. #8
    Service Manager 100+ Posts
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    My Bad,
    I read my post about the banding
    Notice the Black & white on the left is ok
    The problem started like this and the band was moving all over the inage.
    then the image would print great and happen again.
    did a P5 with all of the colors and got solids a few times then this banding came back.

    then it was yellow only and now the black .

    then sometimes you would get a good copy!
    the drum would not "get better"
    theres an HV or transfer of the DEV to drum issue.

    Guys this C1 from the start has been a real nightmare.
    No wonder Canon gave up,
    but I cant if theres a chance I can track this down.

    For a start the DEV units have been restarted and clean.
    the drum and brush clean assy are good along with the cleaning blades.

    The itb belt assy has 70K and was cleaned and will be replaced as soon as we
    fix this problem.

    Right now I could spend over 3K in parts for a C1 that has less that 70K
    Drum,Dev units,ITB, and all of the cleaning brush assy.
    Hard to think that this is that bad,
    but the copier is VERY clean inside and out

    We do know of the DEV units failing too soon
    and the high Maint.
    but this is nutz.

    Thanks for helping out guys this is why I am here.
    Its a shame this has so many problems.
    when this thing works its really wonderful.
    P

    C1 banding B&W an&#100.jpg

  9. #9
    Service Manager 10,000+ Posts
    Canon C1 drum question

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    you have a band in the non-image area ,you have posted that before, paper feed location. POST SOME OF THE NEW PROBLEMS !!!!!!!
    THAT IS NOT A CROSS FEED BAND / if short side is the paper feed !!!!!!!!!!!!!!!

    are these prints or copies ?


    Tech Info:
    [B]As the Drum rotates against the Front Seal Plate [A] and the Rear Seal Plate abrasions begin to develop
    and will eventually wear through the Drum outer surface[C]. Once this occurs the Drum could possibly
    begin to leak its Potential Voltage through the worn areas; which leads to Drum failure.
    untitled..JPG
    dd..JPG
    Since the abrasions on the Drum are created by the pressure of the Front Seal Plate and the Rear Seal Plate,
    the material of the seals has been changed to reduce the amount of pressure at the point of contact. By
    minimizing the wear at the edges, the Drum Life should be extended.

    Install the new style Front Seal Plate and Rear Seal Plate at the time of Drum replacement.

    SEAL, PLATE, FRONT=FL2-2707-010
    SEAL, PLATE, REAR=FL2-2708-010
    D KIT ASSEMBLY:=FM2-2491-020
    iPR C1

    Attached Images Attached Images

  10. #10
    Service Manager 100+ Posts
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    You just confirmed what our CBS dealer would NOT!

    They just kept saying "its too soon for the drum to fail"
    The Wear points are just that,
    They didnt even replace the seal plates when they replaced the drum.
    I looked up the service ticket.
    There were no new seal plates or any kit assy that should of been replaced.

    The "metal ring" was the question I thought you would pick right up on.
    I was going to post the pic of the ring but you posted it first.

    Teckat,
    Your a first rate Tech!
    thanks for the confirmation
    Our local CBS dealer has caused so many problems for Canon.
    thanks
    P

    BTW,
    an old trick but good one is to use thin teflon tape wrapped c/ clockwise on the wear points to extend drum life.

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