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  1. #1
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    mpc 4502 black color quality


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    mpc 4502 black color quality

    hello everybody .I have an mpc 4502 which has problem with black.Toner is not evenly distributed on the paper and i have white or more blacked areas.Please see atachment for details.black pcu has 75k.Thank you all in advance for your help.
    Attached Files Attached Files

  2. #2
    Service Manager 1,000+ Posts
    mpc 4502 black color quality

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    Re: mpc 4502 black color quality

    What's the count on Development unit? Count on Transfer/ Sep. Roller? Have you cleaned the laser glasses? All the colors look a little grainy.

  3. #3
    Service Manager 1,000+ Posts fshead's Avatar
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    Re: mpc 4502 black color quality

    it looks very undertoned.
    maybe from sitting for a long time?
    has the machine been used?

  4. #4
    Senior Tech 250+ Posts
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    Re: mpc 4502 black color quality

    A worn out heat sleeve will give copy quality issues like this.

  5. #5
    Service Manager 1,000+ Posts fshead's Avatar
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    Re: mpc 4502 black color quality

    i had a sleeve do that too but it also gave me small smudges......
    DO A SKY shot and stop it before fuser unit

  6. #6
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    mpc 4502 black color quality


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    Re: mpc 4502 black color quality

    Quote Originally Posted by FrohnB View Post
    What's the count on Development unit? Count on Transfer/ Sep. Roller? Have you cleaned the laser glasses? All the colors look a little grainy.
    117k black developer and transfer/sep.That's the total copy count .Yes i have cleaned the laser housing by removing it.Black is very grainy .Magenda has some grains also but not that much.

  7. #7
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    mpc 4502 black color quality


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    Re: mpc 4502 black color quality

    Quote Originally Posted by fshead View Post
    it looks very undertoned.
    maybe from sitting for a long time?
    has the machine been used?
    Yes the machine has been sitting for a long time but i made some....200 copies.nothing has changed.Did forced toner supply,several process controls,and cleaned laser housing as well as black unit.

  8. #8
    Technician
    mpc 4502 black color quality


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    Re: mpc 4502 black color quality

    Quote Originally Posted by fshead View Post
    i had a sleeve do that too but it also gave me small smudges......
    DO A SKY shot and stop it before fuser unit
    I did a skyshot and...indeed.Unfused areas are ok.I cannot believe it.I will replace them and let everybody know the result.

  9. #9
    Service Manager 1,000+ Posts
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    Re: mpc 4502 black color quality

    what are the total counters?

  10. #10
    Senior Tech 100+ Posts
    mpc 4502 black color quality

    JDYAL's Avatar
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    Re: mpc 4502 black color quality

    Since the machine has been sitting for a while I would pull the pcdu's apart and clean the charge rollers. A good cleaning after a machine has been sitting for a while usually takes care of a lot of issues.

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