MP3500 Thermistors

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  • Ricoh-ono
    Technician

    250+ Posts
    • Feb 2008
    • 338
    #1

    MP3500 Thermistors

    I recently rebuilt a fusing unit on a MP3500 and noticed the thermistors (AW100111 & AW100112) were thinner and didn't accumulate as much toner as with previous models. I can see where this thermistor could improve hot roller life on other machines.

    Has anyone had success using these on the Aficio 3035's or previous models?
    Do what you can, with what you have, where you are. ~Theodore Roosevelt
    Tags: aficio 3035, fusing unit, life, mp3500, occur, tested, thermistors
    • Ollie1981
      Toner Monkey

      250+ Posts
      • Mar 2008
      • 418
      #2
      You might get away with these thermistors on a 3035/3045 due to them sharing the same hot roller.

      But I wouldn't recommend it..

        Comment

        • cobiray
          Passing Duplication Xpert

          1,000+ Posts
          • Mar 2008
          • 1199
          #3
          They would have to have the same resistive characteristics as the ones you replace. You would need to measure the resistance of them both at room temperature and at the operating temperature of the hot roller. If they end up measuring the same at both temperatures and the fusers operate at the same temperatures, you might be able to interchange them. Chances are, they are not the same. If they were updates and the same, the number would likely be changed in the parts manual.
          the savin2535 is displaying well bet the hiter lamp is not shining and the lamp had been tested o.k.please kindly help.
          Samir: No, not again. I... why does it say paper jam when there is no paper jam? I swear to God, one of these days, I just kick this piece of shit out the window.
          Michael Bolton: You and me both, man. That thing is lucky I'm not armed.

            Comment

            • MFPGUY
              Technician
              • Oct 2008
              • 25
              #4
              MP3500 Thermistors

              Originally posted by Ricoh-ono
              I recently rebuilt a fusing unit on a MP3500 and noticed the thermistors (AW100111 & AW100112) were thinner and didn't accumulate as much toner as with previous models. I can see where this thermistor could improve hot roller life on other machines.

              Has anyone had success using these on the Aficio 3035's or previous models?

              Very good observation, Im a tech and work in this and the older models and notice the same desgin improvement. Your observation is correct and I have done a test when servicing the old machines and replacing the thermistors with this new ones and had no problem yet. Tested on one model to see if any calls related to thermistor errors would occur and nothing yet.

              In reference to the comment that an update in the manual would have been made, well they would not as they never have in the past because they want to clients to upgrade to newer models.

              If you need parts for any ricoh or lanier search for me MFPGUY.

                Comment

                • rthonpm
                  Field Supervisor

                  2,500+ Posts
                  • Aug 2007
                  • 2856
                  #5
                  Changing the thermistors is just one of Ricoh's many tricks. The MP 3500 thermistors will work back to the AF 2035 with no issues since they all use the same fuser. I've been using them for awhile now and they make the heat tube last a lot longer since there's no chance to get toner scars on the heat tube.
                  Essentially, the AW100052/AW100053, AW100085/AW100086 and AW100111 and AW100112 thermistors are all interchangeable depending on the model. I have yet to try the 111 or 112 on a 22 or 25 series machine yet, though the 85 or 86 (whichever is the shorter one) will work just fine all the way back to a 1022.

                    Comment

                    • cobiray
                      Passing Duplication Xpert

                      1,000+ Posts
                      • Mar 2008
                      • 1199
                      #6
                      Originally posted by MFPGUY
                      In reference to the comment that an update in the manual would have been made, well they would not as they never have in the past because they want to clients to upgrade to newer models.

                      I'm not trying to split hairs, but the parts catalogs are updated. I won't say they are always updated, but if a part is superseded by another, they do update the manuals (eventually). I just downloaded the new MPC3500/4500 and it has the new part numbers for the transfer belt unit and the cleaning unit. Also the part number references the TSB that denoted the change.

                      I am glad to know that the new thermistors work in the previous model machines. Thanks for that bit of knowledge.
                      the savin2535 is displaying well bet the hiter lamp is not shining and the lamp had been tested o.k.please kindly help.
                      Samir: No, not again. I... why does it say paper jam when there is no paper jam? I swear to God, one of these days, I just kick this piece of shit out the window.
                      Michael Bolton: You and me both, man. That thing is lucky I'm not armed.

                        Comment

                        • MFPGUY
                          Technician
                          • Oct 2008
                          • 25
                          #7
                          Originally posted by cobiray
                          I'm not trying to split hairs, but the parts catalogs are updated. I won't say they are always updated, but if a part is superseded by another, they do update the manuals (eventually). I just downloaded the new MPC3500/4500 and it has the new part numbers for the transfer belt unit and the cleaning unit. Also the part number references the TSB that denoted the change.

                          I am glad to know that the new thermistors work in the previous model machines. Thanks for that bit of knowledge.

                          The parts do get updated but from experience they generally change them when changing manufacturers or suppliers. When a major improvement is incorporated into a newer model, is rare that they update the catalog. This has been known by the techs for a long time. Is like pointed above, these thermistors reduce or eliminate scratches on the heat tube. Now, if the techs send feedback about the findings, I don't know if they will implemented. Is all about how long they want the machine in circulation, specially the sales people. The see a machine with a high counter and they want to upgrade for commission. We see the machine as a good machine until hard to replace parts are getting worn out. As long as a good pm makes the machine work, that machine is good for me. Try the thermistor trick and you will wao! your self.

                            Comment

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