rp3700 t01-521/ drum won't release

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  • reignbear
    Technician
    • Jun 2014
    • 16

    #1

    [Error Code] rp3700 t01-521/ drum won't release

    just when i thought things were starting to run well, I was hit with this one last night. It pops up whenever I try to do basically anything, I hit reset and it goes away and then pops up again when i try to do anything with the drum (print, make master, eject). My biggest concern at the moment is that I can't even eject the drum without getting the error. I was going to try and eject the drum manually from the test mode, but when I go to test mode 552 to get the drum into position-b to release it I'm again greeted with the error. Any thoughts would be greatly appreciated!
    Last edited by reignbear; 07-23-2014, 06:41 AM.
  • ddude
    General Troublemaker

    250+ Posts
    • Feb 2009
    • 473

    #2
    Re: rp3700 t01-521/ drum won't release

    Sounds like the machine is slightly out-of-time. Difficult for a non-tech to fix.
    2000 mockingbirds = 2 kilomockingbirds

    Comment

    • reignbear
      Technician
      • Jun 2014
      • 16

      #3
      Re: rp3700 t01-521/ drum won't release

      I think i found the culprit and hopefully the unit doesn't need to be re-timed. The machine was previously neglected for quite a while before i got it and it was covered in all kinds of dust and glitter (no joke!). a few weeks ago i was having some issues and decided to try and dust out a lot of the machine including the position-b sensor, at the time i noticed a piece of black electrical tape on the position-b detection plate that was coming loose, so i pushed it back down and finished cleaning the machine. tonight i wondered if that was possibly related to the problem here and removed the position-b sensor and the detection plate wasn't there... so i peeked behind the power supply with a flashlight and i could see that the detection plate was just to the left of the sensor and the tape was really falling off (it's been hot and muggy here) so I used the tip of an x-acto to reach in there and re-secure the tape. hooked everything back up and powered the machine on, my error was gone and I was able to remove the drum. my question now is what is the purpose of the tape on the position-b detection plate? should i remove it or replace it?

      tldr: there was a loose piece of electrical tape on my position-b detection plate. why is it there and should i replace it or just remove it?

      here's a photo for good measure.

      pos-b plate.jpg

      Comment

      • jermyth
        Riso dude

        250+ Posts
        • Mar 2011
        • 438

        #4
        Re: rp3700 t01-521/ drum won't release

        There shouldn't be any tape on the plate. My guess is the plate was either replaced and not the correct plate or the sensor is going bad and needs replaced.
        Good luck.

        Comment

        • laitang
          Senior Tech

          500+ Posts
          • Nov 2012
          • 627

          #5
          Re: rp3700 t01-521/ drum won't release

          T01-521:The position-A sensor does not go ON/OFF while the main motor is operating

          Press Reset Key and restart machine

          Comment

          • reignbear
            Technician
            • Jun 2014
            • 16

            #6
            Re: rp3700 t01-521/ drum won't release

            Thanks for the reply, once I got the tape situation on the position-b detection plate sorted out the errors went away.

            Comment

            • Danyjuli
              Junior Member
              • Feb 2022
              • 1

              #7
              Re: rp3700 t01-521/ drum won't release

              Originally posted by reignbear
              I think i found the culprit and hopefully the unit doesn't need to be re-timed. The machine was previously neglected for quite a while before i got it and it was covered in all kinds of dust and glitter (no joke!). a few weeks ago i was having some issues and decided to try and dust out a lot of the machine including the position-b sensor, at the time i noticed a piece of black electrical tape on the position-b detection plate that was coming loose, so i pushed it back down and finished cleaning the machine. tonight i wondered if that was possibly related to the problem here and removed the position-b sensor and the detection plate wasn't there... so i peeked behind the power supply with a flashlight and i could see that the detection plate was just to the left of the sensor and the tape was really falling off (it's been hot and muggy here) so I used the tip of an x-acto to reach in there and re-secure the tape. hooked everything back up and powered the machine on, my error was gone and I was able to remove the drum. my question now is what is the purpose of the tape on the position-b detection plate? should i remove it or replace it?

              tldr: there was a loose piece of electrical tape on my position-b detection plate. why is it there and should i replace it or just remove it?

              here's a photo for good measure.

              [ATTACH=CONFIG]25761[/ATTACH]
              Where is the sensor, can someone help me?

              Comment

              • ntbann
                Senior Tech

                500+ Posts
                • Jan 2012
                • 625

                #8
                Re: rp3700 t01-521/ drum won't release

                The sensor was removed in this picture

                Comment

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