Konica Minolta C70HC - toner not sticking on one edge

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  • diwakar
    Technician
    • Aug 2019
    • 37
    #1

    Konica Minolta C70HC - toner not sticking on one edge

    hello everyone !

    we are using konica c70hc and the toner is not sticking properly on one side only. This issue is coming with dark colours - like black and dark blue only. Lighter colours are coming out fine.

    Specs:

    Sheet - Magno Sappi 12x18 inches, Matte
    GSM: 285
    Tray: Bypass

    In the fuser unit, we have recently replaced upper, lower rollers, belt, thermostat, pressure assembly but nothing worked

    Please refer to the images uploaded. Any advice / help will be highly appreciated.
    Stay safe and a great time ahead !

    WhatsApp Image 2023-01-31 at 13.20.24 (1).jpgWhatsApp Image 2023-01-31 at 13.20.24.jpgWhatsApp Image 2023-01-31 at 13.20.25 (1).jpgWhatsApp Image 2023-01-31 at 13.20.25.jpgWhatsApp Image 2023-01-31 at 13.20.26.jpg
    Tags: c70hc, colours, coming, dark, konica
    • tulintron
      Senior Tech

      Site Contributor
      500+ Posts
      • Jul 2014
      • 664
      #2
      Re: Konica Minolta C70HC - toner not sticking on one edge

      Originally posted by diwakar
      hello everyone !

      we are using konica c70hc and the toner is not sticking properly on one side only. This issue is coming with dark colours - like black and dark blue only. Lighter colours are coming out fine.

      Specs:

      Sheet - Magno Sappi 12x18 inches, Matte
      GSM: 285
      Tray: Bypass

      In the fuser unit, we have recently replaced upper, lower rollers, belt, thermostat, pressure assembly but nothing worked

      Please refer to the images uploaded. Any advice / help will be highly appreciated.
      Stay safe and a great time ahead !

      [ATTACH=CONFIG]56582[/ATTACH][ATTACH=CONFIG]56583[/ATTACH][ATTACH=CONFIG]56584[/ATTACH][ATTACH=CONFIG]56585[/ATTACH][ATTACH=CONFIG]56586[/ATTACH]
      Did the rollers you changed come with the bearings and collars?

      Pay attention to the useful life of the lamp. It can light with low power and not maintain the temperature.
      https://www.copytechnet.com/images/smilies/cool.pngNada como dia após diahttps://www.copytechnet.com/images/smilies/cool.png

        Comment

        • diwakar
          Technician
          • Aug 2019
          • 37
          #3
          Re: Konica Minolta C70HC - toner not sticking on one edge

          Originally posted by tulintron
          Did the rollers you changed come with the bearings and collars?

          Pay attention to the useful life of the lamp. It can light with low power and not maintain the temperature.

          Yes, the collars and heating lamps were changed as well. Can this be related to high humidity ? Machine is at 46% but paper might have retained some humidity because the usual relative humidity is 74%

            Comment

            • diwakar
              Technician
              • Aug 2019
              • 37
              #4
              Re: Konica Minolta C70HC - toner not sticking on one edge

              Originally posted by tulintron
              Did the rollers you changed come with the bearings and collars?

              Pay attention to the useful life of the lamp. It can light with low power and not maintain the temperature.
              Hi, if the lamps won't be able to maintain temperature, the machine will shown error code / or will come in Warming Up stage ?

                Comment

                • Toxic
                  Senior Tech

                  500+ Posts
                  • Dec 2009
                  • 691
                  #5
                  Re: Konica Minolta C70HC - toner not sticking on one edge

                  High humidity can cause this.
                  Toner is OEM or some replacement?
                  Did you try to increase fusing temperature?

                    Comment

                    • diwakar
                      Technician
                      • Aug 2019
                      • 37
                      #6
                      Re: Konica Minolta C70HC - toner not sticking on one edge

                      Humidity is 35% and temperature is 25 deg.
                      Also, the collars were replaced as well. I have attached the images of fuser unit and tray setting.

                      fuser.jpgbypass tray specs.jpg

                        Comment

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