sharp ar m276

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  • suffer_fly
    Technician
    • Jan 2010
    • 15
    #1

    sharp ar m276

    need help here..
    power supply unit middle fuse blow..
    but when i disconnect heater lamp connector -> fuse ok...
    is it bcouse thermostat is faulty..



    ricoh technician
    Tags: heater, lamp, middle, nec, sharp, supply, tech, technician, thermostat, unit
    • blackcat4866
      Master Of The Obvious

      Site Contributor
      10,000+ Posts
      • Jul 2007
      • 22927
      #2
      Re: sharp ar m276

      Have you metered out the various components of the fuser? This is a very simple fuser. The heat lamp should read 4 or 5 ohms. The thermal switch should be closed, 0 ohms, and the thermistor should read in the 100M ohm range when at room temperature.

      Also check that none of these components is shorted to frame ground. That's what would cause blown fuses. =^..^=
      If you'd like a serious answer to your request:
      1) demonstrate that you've read the manual
      2) demonstrate that you made some attempt to fix it.
      3) if you're going to ask about jams include the jam code.
      4) if you're going to ask about an error code include the error code.
      5) You are the person onsite. Only you can make observations.

      blackcat: Master Of The Obvious =^..^=

        Comment

        • suffer_fly
          Technician
          • Jan 2010
          • 15
          #3
          Re: sharp ar m276

          Originally posted by blackcat4866
          Have you metered out the various components of the fuser? This is a very simple fuser. The heat lamp should read 4 or 5 ohms. The thermal switch should be closed, 0 ohms, and the thermistor should read in the 100M ohm range when at room temperature.

          Also check that none of these components is shorted to frame ground. That's what would cause blown fuses. =^..^=
          nop im not metered it but confirm no components is shorted to ground..

            Comment

            • blackcat4866
              Master Of The Obvious

              Site Contributor
              10,000+ Posts
              • Jul 2007
              • 22927
              #4
              Re: sharp ar m276

              Originally posted by suffer_fly
              nop im not metered it but confirm no components is shorted to ground..
              If you have not metered out the components, exactly how did you determine whether any of them are shorted to ground? =^..^=
              If you'd like a serious answer to your request:
              1) demonstrate that you've read the manual
              2) demonstrate that you made some attempt to fix it.
              3) if you're going to ask about jams include the jam code.
              4) if you're going to ask about an error code include the error code.
              5) You are the person onsite. Only you can make observations.

              blackcat: Master Of The Obvious =^..^=

                Comment

                • Dark Helmet
                  Senior Tech

                  Site Contributor
                  500+ Posts
                  • May 2009
                  • 830
                  #5
                  Re: sharp ar m276

                  Put your meter on diode check so it makes a beeping noise. Put one lead on the frame of the copier and the other on the fuse that keeps blowing. (make sure it's a good fuse and the copier is unplugged). If your meter starts beeping start unplugging things until the beeping stops. What ever you unplugged has a short.
                  Evil will always triumph because good is dumb.

                    Comment

                    • JustManuals
                      Field Supervisor

                      5,000+ Posts
                      • Jan 2006
                      • 9838
                      #6
                      Re: sharp ar m276

                      This Parts & Service manual can be purchased for $12.77 and downloaded immediately after payment from

                      http://www.justmanuals.com


                      Paul@justmanuals.com

                        Comment

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