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  1. #1
    Service Manager 1,000+ Posts
    Mpc4502 no toner magenta

    mrfuser's Avatar
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    Mpc4502 no toner magenta

    Ok, machine was having magenta toner issues, tried new cartridge with same result, then replaced toner pump. Immediately fixed, or so I thought. After replaced the pump it showed full toner and everything was fine with td levels and my test prints. Left and after about an hour the client called back that again magenta was out! Eh??

    any ideas? Maybe bad developer unit because toner pump wasnít working? But if so why did it work fine for a little bit?

  2. #2
    Field Supervisor 500+ Posts
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    Re: Mpc4502 no toner magenta

    PM count on unit? Is dev unit turning? Dev on roller? Is it calling for toner, did you change tube.

  3. #3
    Retired 5,000+ Posts slimslob's Avatar
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    Re: Mpc4502 no toner magenta

    Damaged contacts on the toner bottle detection board or the back end of the bottle. Usually caused by the user slamming the bottle in rather than sliding it in gently. Could also be a bad chip on the bottle.

  4. #4
    Service Manager 1,000+ Posts fshead's Avatar
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    Re: Mpc4502 no toner magenta

    OEM TONER?
    is the bottle empty???????
    Is unit overtoned?????????????
    did you ck the waste unit and is it top heavy wth magenta?

  5. #5
    How'd ya manage that? 500+ Posts zed255's Avatar
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    Re: Mpc4502 no toner magenta

    Quote Originally Posted by davel View Post
    ... Is it calling for toner, did you change tube.
    +1 to this. Seen lazy guys replace the pumps and not bother to install the tube that comes with the pump, only to have the same issue shortly thereafter.
    Zed
    One out of four people is mentally unbalanced.
    Think of your three closest friends...
    If they seem okay, then You're The One.

  6. #6
    Senior Tech 1,000+ Posts
    Mpc4502 no toner magenta

    mikadonovan's Avatar
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    Re: Mpc4502 no toner magenta

    Quote Originally Posted by zed255 View Post
    +1 to this. Seen lazy guys replace the pumps and not bother to install the tube that comes with the pump, only to have the same issue shortly thereafter.
    +2
    NEVER ASSUME ANYTHING

  7. #7
    Service Manager 1,000+ Posts fshead's Avatar
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    Re: Mpc4502 no toner magenta

    is it called a tube or a hose???????????
    I pull them out and the spring loaded piece and shoot air outside and as long as they are not torn or hard resuse them.,
    I hate swapping the danm yellow one as my fat hands dont fit and getting the danm connector back on always gives me
    fits..
    I keep meaning to make a jig but never the free time...

  8. #8
    Service Manager 1,000+ Posts fshead's Avatar
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    Re: Mpc4502 no toner magenta

    Quote Originally Posted by mrfuser View Post
    Ok, machine was having magenta toner issues, tried new cartridge with same result, then replaced toner pump. Immediately fixed, or so I thought. After replaced the pump it showed full toner and everything was fine with td levels and my test prints. Left and after about an hour the client called back that again magenta was out! Eh??

    any ideas? Maybe bad developer unit because toner pump wasnít working? But if so why did it work fine for a little bit?

    >>any ideas? Maybe bad developer unit because toner pump wasnít working?
    might as well swap out all drums,devELOPER units,ITB unit and fuser and hope you hit paydirt.......

  9. #9
    Service Manager 1,000+ Posts
    Mpc4502 no toner magenta

    mrfuser's Avatar
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    Re: Mpc4502 no toner magenta

    Rf contact on back was completely coated. Cleaned and came to ready. Only issue is for magenta only it does not show how much is in it just shows a blank column

  10. #10
    Senior Tech 250+ Posts Zaxxon's Avatar
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    Re: Mpc4502 no toner magenta

    Quote Originally Posted by zed255 View Post
    +1 to this. Seen lazy guys replace the pumps and not bother to install the tube that comes with the pump, only to have the same issue shortly thereafter.
    Iím one of the lazy guys, always just vacuum the hose, works every time.

    1. Remove old pump.
    2. Suck the hose from the toner hopper side (my sucker i rather long).
    3. Install new pump.

    Remember to close vertical cover on paper banks, got lot of theses...
    Please start you post with brand, model, problem.

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