Thanks Thanks:  0
Likes Likes:  0
Dislikes Dislikes:  0
Results 1 to 7 of 7
  1. #1
    Technician
    Join Date
    May 2013
    Location
    Seoul, Seoul
    Posts
    17
    Rep Power
    0

    KM 1050. White Dot in Backside problem.

    Hi, everyone.

    I have KM 1050.

    I have a White Dot problem in Backside.
    Front Page is OK. But Rear Side is problem.

    A4 size is little bit problem. but A4R or B5 is serious.

    I changed Drum, Developer, all Wires, Grid, and adjust Transfer voltages.
    But Problem is still remains.


    Attached PDF contains some sample pages (Test Pattern 7)
    1Page- Back
    2Page- Back
    3Page- Front

    1050TP7_.pdf



    Thank you for help.

  2. #2
    Senior Tech 100+ Posts
    Join Date
    Jun 2008
    Posts
    192
    Rep Power
    34

    Re: KM 1050. White Dot in Backside problem.

    Hi there.

    I would say that transfer/separation is improper.
    But from your explanation if the back side is with the problem. Then may be paper gets too much curl in the fuser.
    Try lowering the temp or better first try with good quality paper to see if it improves.
    Good look.

  3. #3
    Senior Tech 100+ Posts inutelkamo's Avatar
    Join Date
    Jul 2011
    Location
    somewhere esle
    Posts
    143
    Rep Power
    27

    Re: KM 1050. White Dot in Backside problem.

    hello..

    have you tried printing it on other types of paper?
    or did you did printing it in auto duplex mode??
    or try printing one side 1st then put back for other sides?

    as i can see, you have change all major components for imaging..
    that problem is a big no way cause by a faulty electrical components.

    maybe the problem is in the paper..
    Moisture as we call it..
    1st side is okey, then upon fixing it,
    at hot temperature, water from paper evaporates,
    causing a poor image transfer for back side..

    try to print it on a normal paper,
    or maybe put your paper under the sun for 1 hour before printing on it..

    One more, try printing 2 sided back 2 back blank page,
    then print you test pattern on it...
    if 2 sides has white spots, confirm, its moisture...

    Hope it helps..

  4. #4
    Technician
    Join Date
    May 2013
    Location
    Seoul, Seoul
    Posts
    17
    Rep Power
    0

    Re: KM 1050. White Dot in Backside problem.

    Thank you for your opinion.

    I tried some kind of papers.
    But problem is same.
    so, I think this is not paper or moisture problem.

    and I replaced all Electric parts.
    Like a Drum, Developer, Grid, all Wires but problem is still remains.


    What can I do, next?



    Quote Originally Posted by inutelkamo View Post
    hello..

    have you tried printing it on other types of paper?
    or did you did printing it in auto duplex mode??
    or try printing one side 1st then put back for other sides?

    as i can see, you have change all major components for imaging..
    that problem is a big no way cause by a faulty electrical components.

    maybe the problem is in the paper..
    Moisture as we call it..
    1st side is okey, then upon fixing it,
    at hot temperature, water from paper evaporates,
    causing a poor image transfer for back side..

    try to print it on a normal paper,
    or maybe put your paper under the sun for 1 hour before printing on it..

    One more, try printing 2 sided back 2 back blank page,
    then print you test pattern on it...
    if 2 sides has white spots, confirm, its moisture...

    Hope it helps..

  5. #5
    Technician
    Join Date
    Jul 2011
    Posts
    37
    Rep Power
    26

    Re: KM 1050. White Dot in Backside problem.

    Quote Originally Posted by 600k View Post
    Hi, everyone.

    I have KM 1050.

    I have a White Dot problem in Backside.
    Front Page is OK. But Rear Side is problem.

    A4 size is little bit problem. but A4R or B5 is serious.

    I changed Drum, Developer, all Wires, Grid, and adjust Transfer voltages.
    But Problem is still remains.


    Attached PDF contains some sample pages (Test Pattern 7)
    1Page- Back
    2Page- Back
    3Page- Front

    1050TP7_.pdf



    Thank you for help.
    Hi,

    Check the fuser unit belt and the fuser roller that comes into contact with the paper. It could be scratched.

  6. #6
    Senior Tech 250+ Posts Mick01's Avatar
    Join Date
    Nov 2012
    Location
    Werribee Victoria
    Posts
    362
    Rep Power
    31

    Re: KM 1050. White Dot in Backside problem.

    Your issue is most likely paper curl on second side. The 1050 uses a T&S corona unit for transferring toner onto the paper. It is extremely low maintenance but struggles with toner transfer with curled paper. There is a transfer assist plate that helps with this (this is the main reason why A4 portrait looks better). The transfer assist cannot work with A4R as it will scratch the drum surface. You can purchase an A4R T&S corona unit that has the smaller transfer assist guide. This will make your prints better with A4R paper.
    This is old technology now, the new B&W machines use a transfer belt which is much better at toner transfer onto the second side. The samples you provided look about as good as you will probably get on a 1050.

  7. #7
    Field Supervisor 500+ Posts
    KM 1050. White Dot in Backside problem.


    Join Date
    Dec 2008
    Location
    Baltimore, Maryland
    Posts
    912
    Rep Power
    42

    Re: KM 1050. White Dot in Backside problem.

    DID YOU CLEAN THE GLASS? I HAVE SEEN THE DV UNIT BLOW DV/TONER ON THE GLASS DURING A IMPROPER CLOSING.

    then you get this on copies and prints.

    clean or pull the slit glass, then copy again.

    not 100% sure but happens sometimes.

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