Konica Minolta C300i - excessive toner consumption

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  • DiVallelunga_Makhymo
    Technician
    • May 2017
    • 10

    Konica Minolta C300i - excessive toner consumption

    hi, we have a Konica Minolta C300i under repair, the MFP has less than 30,000 pages and has already changed 6 black toners, 2 for each color and as many toner boxes. Do you have any idea why this excessive toner consumption?
    P.s I updated the sign to version G00-79.


    Thanks.
  • tsbservice
    Field tech

    Site Contributor
    5,000+ Posts
    • May 2007
    • 7635

    #2
    Re: Konica Minolta C300i - excessive toner consumption

    Never seen nor hear this.
    Drums erase led strips working? CQ problems?
    Obviously for some reason toner is going in WTB abnormally fast.
    Bad high voltage pcb also come in mind.
    Good luck and please definitely post outcome here.
    A tree is known by its fruit, a man by his deeds. A good deed is never lost, he who sows courtesy, reaps friendship, and he who plants kindness gathers love.
    Blessed are they who can laugh at themselves, for they shall never cease to be amused.

    Comment

    • Bix
      Service Manager

      1,000+ Posts
      • Apr 2018
      • 1421

      #3
      Re: Konica Minolta C300i - excessive toner consumption

      Hi, I advise you to view the voltage values within the Service Mode.

      Comment

      • emujo2
        Service Manager

        1,000+ Posts
        • Mar 2017
        • 1580

        #4
        Re: Konica Minolta C300i - excessive toner consumption

        you should be getting 28 k per bottle..based on 8x11 1 sided, 6% fill. Enable the coverage counter detail and run for some time period ..Check to see if your toner coverage is in excess of 30 -35%..E

        Comment

        • Haaland
          Technician
          • Mar 2009
          • 20

          #5
          Re: Konica Minolta C300i - excessive toner consumption

          Any solution on this one? customer of mine is reporting the same problem.

          Comment

          • Bix
            Service Manager

            1,000+ Posts
            • Apr 2018
            • 1421

            #6
            Re: Konica Minolta C300i - excessive toner consumption

            Originally posted by Haaland
            Any solution on this one? customer of mine is reporting the same problem.
            Hi, have you updated the firmware to G00-B6?
            At what level is the TCR?
            What have you already analyzed / replaced?

            Comment

            • Haaland
              Technician
              • Mar 2009
              • 20

              #7
              Re: Konica Minolta C300i - excessive toner consumption

              Just arrived, firmware is 7B, and will be updated now.
              TCR is between 4.7 and 4.8 at color and 6.03 at black.
              Manual is saying between 4 and 7% should be okay for black
              Table No. is also at spec.

              Comment

              • Bix
                Service Manager

                1,000+ Posts
                • Apr 2018
                • 1421

                #8
                Re: Konica Minolta C300i - excessive toner consumption

                There is something wrong with the TCR. It should be about 6%. If I'm not wrong, you can add toner in the service mode. In the technical course I was suggested to do an image stability initialization and to perform calibration until TCR rises to 6%.

                Comment

                • Haaland
                  Technician
                  • Mar 2009
                  • 20

                  #9
                  Re: Konica Minolta C300i - excessive toner consumption

                  I forgot to mention, unlike DiVallelunga_Makhymo, this machine is only having problem with black toner, so im not so worried about the colors.
                  but i will try do a image stability initialization, just in case.

                  Comment

                  • copier tech
                    Field Supervisor

                    5,000+ Posts
                    • Jan 2014
                    • 7931

                    #10
                    Re: Konica Minolta C300i - excessive toner consumption

                    Originally posted by Haaland
                    Any solution on this one? customer of mine is reporting the same problem.
                    There have been a few bulletins for this model, your issue may relate to the one below. Basically they've added a new toner agitation feature.

                    i series toner aggitation.pdf
                    Let us eat, drink, and be merry, because tomorrow we may die!

                    For all your firmware & service manual needs please visit us at:

                    www.copierfirmware.co.uk - www.printerfirmware.co.uk

                    ​

                    Comment

                    • tsbservice
                      Field tech

                      Site Contributor
                      5,000+ Posts
                      • May 2007
                      • 7635

                      #11
                      Re: Konica Minolta C300i - excessive toner consumption

                      Originally posted by copier tech
                      There have been a few bulletins for this model, your issue may relate to the one below. Basically they've added a new toner agitation feature.

                      [ATTACH]47610[/ATTACH]
                      This isn't for C300i series. Anyway Haaland didn't mention machine model so we can only guess.
                      A tree is known by its fruit, a man by his deeds. A good deed is never lost, he who sows courtesy, reaps friendship, and he who plants kindness gathers love.
                      Blessed are they who can laugh at themselves, for they shall never cease to be amused.

                      Comment

                      • tsbservice
                        Field tech

                        Site Contributor
                        5,000+ Posts
                        • May 2007
                        • 7635

                        #12
                        Re: Konica Minolta C300i - excessive toner consumption

                        Originally posted by Haaland
                        Just arrived, firmware is 7B, and will be updated now.
                        TCR is between 4.7 and 4.8 at color and 6.03 at black.
                        Manual is saying between 4 and 7% should be okay for black
                        Table No. is also at spec.
                        What model? Those color TCRs are too low for C300i series.
                        Should be:
                        5.5% (black) 4.0%-7.0%
                        6.5% (magenta) 5.0%-8.0%
                        7.0% (cyan/yellow) 5.5%-8.5%

                        The only TCR value within specs is black.
                        ​Any anomalies on test prints?
                        A tree is known by its fruit, a man by his deeds. A good deed is never lost, he who sows courtesy, reaps friendship, and he who plants kindness gathers love.
                        Blessed are they who can laugh at themselves, for they shall never cease to be amused.

                        Comment

                        • Haaland
                          Technician
                          • Mar 2009
                          • 20

                          #13
                          Re: Konica Minolta C300i - excessive toner consumption

                          No issue with print quality, and yes, its a C300i-sieres, or a C250i to be specific.
                          What i did earlier today was to take out the HV-board and check all the connections, and also clean them with alcohol, as well as the connectors between the machine and drums.
                          I know there has been some issues similar on the C3350i and most of the time on that model it was enough to clean connectors.
                          Customer is informed and will contact me if they need a new toner after short time, too bad they just replaced the black toner, so it might take a while.
                          My plan B i to replace the HV-board.
                          I will also compare the TCR with another machine tomorrow morning, i have a feeling that this is HV-related and not TCR, but i cant know for sure.

                          EDIT:
                          Machine is also connected to CSRC, today the counter was at 6600 copies, i will probably check the counter in csrc after a while and then visit them and check the toner, if the toner is only half full after 1000 copies, i know the issue is not solved.

                          Comment

                          • tsbservice
                            Field tech

                            Site Contributor
                            5,000+ Posts
                            • May 2007
                            • 7635

                            #14
                            Re: Konica Minolta C300i - excessive toner consumption

                            Originally posted by Haaland
                            No issue with print quality, and yes, its a C300i-sieres, or a C250i to be specific.
                            What i did earlier today was to take out the HV-board and check all the connections, and also clean them with alcohol, as well as the connectors between the machine and drums.
                            I know there has been some issues similar on the C3350i and most of the time on that model it was enough to clean connectors.
                            Customer is informed and will contact me if they need a new toner after short time, too bad they just replaced the black toner, so it might take a while.
                            My plan B i to replace the HV-board.
                            I will also compare the TCR with another machine tomorrow morning, i have a feeling that this is HV-related and not TCR, but i cant know for sure.

                            EDIT:
                            Machine is also connected to CSRC, today the counter was at 6600 copies, i will probably check the counter in csrc after a while and then visit them and check the toner, if the toner is only half full after 1000 copies, i know the issue is not solved.
                            Have them to save "empty" toners. Are they really empty or machine has another problem and just false report toner empty and tricks customers to change over and over full cartridges.
                            Print MML list and upload here. What about WTB? This quantity toner cannot disappear just like that. It must be in WTB or in 'empty' cartridges.
                            A tree is known by its fruit, a man by his deeds. A good deed is never lost, he who sows courtesy, reaps friendship, and he who plants kindness gathers love.
                            Blessed are they who can laugh at themselves, for they shall never cease to be amused.

                            Comment

                            • Haaland
                              Technician
                              • Mar 2009
                              • 20

                              #15
                              Re: Konica Minolta C300i - excessive toner consumption

                              I did export the MML to usb before i left, i can check when i get back to the office tomorrow.
                              Most of the time toner is ordered by the machine it self via csrc, i can also check how many toner and WTB that we have sent them.

                              Comment

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