Bizhub 421 says replenish paper after one copy

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  • Meeley
    Junior Member
    • May 2025
    • 5

    #1

    Bizhub 421 says replenish paper after one copy

    Hello, machine says replenish paper after one copy at tray1. I changed casette feed unit motor unit both boards and nothing changes. Any suggestions?
  • Synthohol
    Certified Konica Expert

    Site Contributor
    5,000+ Posts
    • Mar 2016
    • 5876

    #2
    try pushing the tray in during a multicopy, check the tray full actuator & ps in the assy. #30
    30.jpg
    We know a thing or two because we've seen a thing or two.
    The medication helps though...

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    • kingarthur
      Service Manager

      1,000+ Posts
      • Feb 2008
      • 1383

      #3
      Originally posted by Synthohol
      try pushing the tray in during a multicopy, check the tray full actuator & ps in the assy. #30
      30.jpg
      reading this has brought back a distant memory, was this the model that the cassettes used to crack, and not be held in properly, for which there were various mods.....
      Tip for the day; Treat every problem as your dog would.....If you cant eat it or f*ck it....then p*ss on it & walk away...

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      • Synthohol
        Certified Konica Expert

        Site Contributor
        5,000+ Posts
        • Mar 2016
        • 5876

        #4
        HA! i plastic-welded so many cracked trays in the day. soldering iron and a cd jewel case fragment for support.
        for the others that needed a shim in the back for the arm id drill a hole and thread a zip-tie through it to "extend" the tray and push the arm in better. shims fall off
        thats why i first suggested pushing the tray in for multipages!
        We know a thing or two because we've seen a thing or two.
        The medication helps though...

        Comment

        • Meeley
          Junior Member
          • May 2025
          • 5

          #5
          Originally posted by Synthohol
          try pushing the tray in during a multicopy, check the tray full actuator & ps in the assy. #30
          30.jpg
          Thank you I'll look that tomorrow

          Comment

          • copyman
            Owner / Technician

            Site Contributor
            2,500+ Posts
            • Sep 2005
            • 4745

            #6
            Ha-ha, some here are showing their age knowing what a Biz 421 is ...... Including me! I still have one of these in service. This customer had it since new. Only one time replaced drum , dev, PF rollers. Oh yea the toner btl assembly which was a common problem.

            Comment

            • femaster
              Service Manager

              1,000+ Posts
              • May 2011
              • 1516

              #7
              Originally posted by copyman
              Ha-ha, some here are showing their age knowing what a Biz 421 is ...... Including me! I still have one of these in service. This customer had it since new. Only one time replaced drum , dev, PF rollers. Oh yea the toner btl assembly which was a common problem.
              Our last 421 "came out of the field" about 9 months ago. They just wouldn't get rid of it, and I guess I know why now. They ended up getting bought out by a Private Equity Firm, and then they filed for bankruptcy shortly after that. That was the end of that machine (and a number of other models) thankfully.
              A Ricoh Service Tech for 7 year. A Konica Minolta Service Tech for 7 years. Now, KM service manager for 4 years.
              My Ricoh knowledge is slowly dwindling away at this point. Many things have been lost to time...

              Comment

              • copyman
                Owner / Technician

                Site Contributor
                2,500+ Posts
                • Sep 2005
                • 4745

                #8
                Originally posted by femaster

                Our last 421 "came out of the field" about 9 months ago. They just wouldn't get rid of it, and I guess I know why now. They ended up getting bought out by a Private Equity Firm, and then they filed for bankruptcy shortly after that. That was the end of that machine (and a number of other models) thankfully.
                Thank goodness they didn't owe you money. Fortunately I've only been beat for money 2 times in all the years I've been in business. I had a lawyer once tell me if someone owes you money offer to take half and call it even, if they tell you " Thanks for offer but I want to pay you everything I owe you" , you will never see a cent from them! Turns out it is true because with both of these customers I offered to take half of what they owed me, funny both said exactly what the laywer said and I never got paid a cent

                Comment

                • Synthohol
                  Certified Konica Expert

                  Site Contributor
                  5,000+ Posts
                  • Mar 2016
                  • 5876

                  #9
                  totally off topic but Copyman reminded me of a time long ago that when certain customers were really late on payments id do a courtesy call and unplug the fuser, get a C500 error a restart wont fix so the machine is dead and needs "parts" we required them to satisfy their debt before ordering parts. worked 8\10 times.
                  We know a thing or two because we've seen a thing or two.
                  The medication helps though...

                  Comment

                  • kingarthur
                    Service Manager

                    1,000+ Posts
                    • Feb 2008
                    • 1383

                    #10
                    Originally posted by Synthohol
                    totally off topic but Copyman reminded me of a time long ago that when certain customers were really late on payments id do a courtesy call and unplug the fuser, get a C500 error a restart wont fix so the machine is dead and needs "parts" we required them to satisfy their debt before ordering parts. worked 8\10 times.
                    still off topic, we had a customer who never paid, their device was set to stop everytime it needed anything, so we had to go and start it again, and collect the money they owed
                    Tip for the day; Treat every problem as your dog would.....If you cant eat it or f*ck it....then p*ss on it & walk away...

                    Comment

                    • ThisPete
                      Too old to care

                      Site Contributor
                      100+ Posts
                      • Jun 2014
                      • 232

                      #11
                      Still off topic, we use Kyocera's remoting in ability to put the machines into coin-op mode.. that focuses the accounts dept. ability to pay...

                      Comment

                      • copyman
                        Owner / Technician

                        Site Contributor
                        2,500+ Posts
                        • Sep 2005
                        • 4745

                        #12
                        Reminded me of when I worked for the big companies, when a customer owed money the tech would show up at customers office to do a "courtesy call", break a corona wire (showing my age again) and walk out the door

                        Comment

                        • ThisPete
                          Too old to care

                          Site Contributor
                          100+ Posts
                          • Jun 2014
                          • 232

                          #13
                          Originally posted by copyman
                          Reminded me of when I worked for the big companies, when a customer owed money the tech would show up at customers office to do a "courtesy call", break a corona wire (showing my age again) and walk out the door
                          What's a corona wire Dad?.... 😉

                          Comment

                          • copyman
                            Owner / Technician

                            Site Contributor
                            2,500+ Posts
                            • Sep 2005
                            • 4745

                            #14
                            Originally posted by ThisPete

                            What's a corona wire Dad?.... 😉
                            Ha-ha, Pete my long lost son. I didn't want you to follow in my footsteps with copiers. I wanted you to be a doctor!

                            Comment

                            • kingarthur
                              Service Manager

                              1,000+ Posts
                              • Feb 2008
                              • 1383

                              #15
                              Originally posted by ThisPete

                              What's a corona wire Dad?.... 😉
                              ha ha, reminds me of when I was showing the apprentice how to swap over a DV unit, i told him how easy he had it, where he just had to swap it over, years ago we had to rebuild them, and use a feeler gauge to adjust the doctor blade...."what's a feeler gauge?" he asked
                              Tip for the day; Treat every problem as your dog would.....If you cant eat it or f*ck it....then p*ss on it & walk away...

                              Comment

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