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  1. #11
    Retired 25 years exp. Dave's Avatar
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    Re: Lexmarl C748DE No Red at all

    Thanks for your reply. Last week was crazy in the office so I didn't get to check in. I have separated the belt section from the cleaner unit, cleaned and inspected it and put it back together. I will put it back in the machine tomorrow and do the "Print Quality Pages".



    Quote Originally Posted by Lance15 View Post
    Turn off the printer
    Hold down the 3 & 6 keys while turning the printer on
    Release the buttons when the splash screen shows (you will also probably hear a beep)
    Scroll down to PRINT TESTS
    Scroll down to Print Quality Pages


    Sounds like your making a big deal out of a simple issue. If you have no color of one color, focus on that. It seems you've already determined the TONER CARTRIDGE is fine. The toner cartridge alone doesn't put the print onto the belt. If that [toner] seems fine, focus on the DRUM and/or BELT.

  2. #12
    Retired 25 years exp. Dave's Avatar
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    Some Print Quality pgs

    The 1st Print quality page indicates no magenta toner when there is clearly magenta toner in the cartridge. I can see magenta toner in the window on the back of the cartridge.IMG_2322 (1).jpg I have not tried doing the sensor test, I will do it tomorrow.



    1st of Print Quality.jpg2nd Print Quality.jpg3rd Print Quality.jpg

  3. #13
    Retired 25 years exp. Dave's Avatar
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    Better image of cartridge info

    Better image of cartridge info

    zoom print quality.jpg

  4. #14
    Master Of The Obvious 10,000+ Posts
    Lexmarl C748DE No Red at all

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    Re: Lexmarl C748DE No Red at all

    Do you really think that the only factor in magenta color reproduction is the presence of magenta toner in the cartridge? If that's truly the case you definitely need to hire somebody with skills. =^..^=
    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 =^..^=

  5. #15
    Retired 25 years exp. Dave's Avatar
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    Re: Lexmarl C748DE No Red at all

    Nope, that's not the case. i know enough about digital boxes. Am I a Lexmark tech, no. I got my nose dirty on Sharps for 20 years and Canon, Minolta and Mita for 5 years before that... Last machine I was factory trained on was a sharp MX-M1100. I retired from the copier business in 2010. I now work in an office the scans 4 million documents a year on 3 Kodak i1860 scanners. My boss was gonna send this Lexmark machine to surplus but I asked for it because I know in time I can fix it. Jus looking for some Lexmark tips here, that's all.


    Quote Originally Posted by blackcat4866 View Post
    Do you really think that the only factor in magenta color reproduction is the presence of magenta toner in the cartridge? If that's truly the case you definitely need to hire somebody with skills. =^..^=

  6. #16
    Service Manager 1,000+ Posts
    Lexmarl C748DE No Red at all


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    Re: Lexmarl C748DE No Red at all

    Photoconductor Unit

    Start with that. More than likely the problem.

  7. #17
    Retired 25 years exp. Dave's Avatar
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    Re: Lexmarl C748DE No Red at all

    Did that, no change.

  8. #18
    Service Manager 1,000+ Posts
    Lexmarl C748DE No Red at all


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    Re: Lexmarl C748DE No Red at all

    40X6401, 40X5096, 40X8307 - Lexmark C734 Transfer Module, IT Item Inc.


    Transfer Belt (ITU). Possible faulty charge roll under the belt for magenta.

  9. #19
    Retired 25 years exp. Dave's Avatar
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    Re: Lexmarl C748DE No Red at all

    Very plausible. I will swap the roller.



    Quote Originally Posted by Lance15 View Post
    40X6401, 40X5096, 40X8307 - Lexmark C734 Transfer Module, IT Item Inc.


    Transfer Belt (ITU). Possible faulty charge roll under the belt for magenta.

  10. #20
    Service Manager 10,000+ Posts
    Lexmarl C748DE No Red at all

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    Re: Lexmarl C748DE No Red at all

    Quote Originally Posted by Dave View Post
    I am quite sure the toner is new, have you seen issues like this with these magenta toner units right out of the box? Just to clarify, there is toner on the mag roller. When I wipe a small area on the mag roller with a clean, lint free cloth, it goes away when the motor turns on after the door is shut. The machine runs, no trouble codes. I have the transfer belt unit out of the machine and am going to go over the magenta transfer roller and connections with a fine tooth comb. If I do get to the point where I replace the toner I'll probably just send the machine to surplus. Also, what is the procedure for printing out the "quality page"?
    Thanks!!
    ARE THESE OEM or compatible toners?

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