Risograph RP 3700 A16-525 Master Probl.

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  • inuit
    Technician
    • May 2013
    • 14
    #1

    [Error Code] Risograph RP 3700 A16-525 Master Probl.

    Hi,

    It's me...again...(I'm not a lucky Risoguy).
    I recently got another Riso RP 3700 in not-so-great conditions. After so (much) time I've cleaned all the machine and changed some parts (some rollers, screws, rubber belts etc..).
    Well:
    • The machine starts, makes all the correct riso-mechanical-adjustment noises
    • the scan works well
    • the paper tray detect if there's paper or not
    • if there's a drum inside with master on the machine do as many copies as you want
    • if you tell it to make a master, it unrolls and burn the master correctly

    BUT:
    It gives this kind of ERROR CODE: A16-525 (Master remains on print drum) even if there's no master on the drum.
    So you'll find the new master (with the image perfectly burned on it) all shrunken in the master disposal box.

    What I tried manually:
    • searched a lot on google/forums but found nothing helpful
    • power ON/OFF the machine multiple times
    • removed and changed (with a functioning one) the Master Loading Sensor(C)+Master Positioning Sensor(D)+MasterMaking Unit Sensor(E) [Fig A attached]
    • removed and changed the Sensor Bracket (B) [Fig B attached]
    • Removed and changed the Position-B Sensor Ass'y [Fig. C attached]


    What I tried in Test Mode:



    So: the machine able to see if there's a master on a drum (and consequently can print perfectly) BUT if there's no master on the drum it say there is one (so produces a new master but is unable to put it on the drum).
    Hope what I've written can help you to help me.
    Thank you,


    Marco

    A -Riso MasterLoadingSensor.jpgB - Riso SensorBracket.jpgC- Riso PositionBSensorAssy.jpg
    Tags: code, error, image, paper, parts, print, scan, test, time, unit
    • jermyth
      Riso dude

      250+ Posts
      • Mar 2011
      • 437
      #2
      Re: Risograph RP 3700 A16-525 Master Probl.

      Open the unit (scanner up), cheat the safety switches, punch in to do a confidental master, watch what it does. Does the clamp open and eject the old master? Does it error after that? Does it put the new master on and then remove it? Good luck.

        Comment

        • Iowatech
          Not a service manager

          2,500+ Posts
          • Dec 2009
          • 3930
          #3
          Re: Risograph RP 3700 A16-525 Master Probl.

          Just clockwise from the master clamp, there is a black area on the drum. Make sure that is in good shape, as that is where the machine looks to see if the master removing process has completed properly.

            Comment

            • RRodgers
              Service Manager

              1,000+ Posts
              • Jun 2009
              • 1947
              #4
              Re: Risograph RP 3700 A16-525 Master Probl.

              Be sure your clamp is working properly as well. Shouldn't be any ink under it at all. This will cause it to stick.
              Color is not 4 times harder... it's 65,000 times harder. They call it "TECH MODE" for a reason. I have manual's and firmware for ya, course... you are going to have to earn it.

                Comment

                • jermyth
                  Riso dude

                  250+ Posts
                  • Mar 2011
                  • 437
                  #5
                  Re: Risograph RP 3700 A16-525 Master Probl.

                  And I forgot to mention, check the white rollers on the clamp. No cracks or broken off.

                    Comment

                    • Riso Tecky
                      #6
                      Re: Risograph RP 3700 A16-525 Master Probl.

                      On the the drum its self there is a black felt part# 030-16241-104 light absorber sheet if that is missing the Riso will think that the master sheet is still on the drum, check to see if that's there they sometimes fall off the drum.

                        Comment

                        • Iowatech
                          Not a service manager

                          2,500+ Posts
                          • Dec 2009
                          • 3930
                          #7
                          Re: Risograph RP 3700 A16-525 Master Probl.

                          Originally posted by Riso Tecky
                          On the the drum its self there is a black felt part# 030-16241-104 light absorber sheet if that is missing the Riso will think that the master sheet is still on the drum, check to see if that's there they sometimes fall off the drum.
                          Yeah, like I said earlier. Still, good call on the part number.

                            Comment

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