DF 780 J 93 's

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  • FranM
    Junior Member
    • Dec 2013
    • 2
    #1

    DF 780 J 93 's

    I have a DF 780 finisher on a TaskAlpha250ci tha will pass one piece of paper and then the second will jam @ J 93
    entrance sesor (emitter and collector) have been replaced as well as the switchback motor
    Any thoughts?
    Tags: df 780, df780, j93
    • blackcat4866
      Master Of The Obvious

      Site Contributor
      10,000+ Posts
      • Jul 2007
      • 23008
      #2
      Re: DF 780 J 93 's

      I've seen this jam code on two occasions. The first time it was caused by glossy, heavy paper ... too heavy per DF-780 finisher specs. All other paper fed fine.

      The second time it was on a DF-730, which is a similar build. The flappers that pull the paper back in for stapling tray are specifically timed to miss the side registration guides. When the flappers turn too slowly, due to friction from the bronze oil impregnated bushings, the flappers either strike the side reg guide, or block the paper path because of late timing. I disassembled the mechanical drive, cleaned and oiled the bushings (just squirting oil around randomly doesn't fix anything). Don't make the same mistake I did: On the DF-730 the flappers are actuated by a solenoid. I had the bright idea to remove the sound damping pad. It took about a year for the actuator to magnetize, allowing the flappers to make a second rotation, also causing the same jamming. Either leave the sound damping pad there, or replace it with one that isn't made of foam, for example rubber or heavy adhesive backed mylar.

      =^..^=
      Last edited by blackcat4866; 03-27-2014, 10:02 PM.
      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

        • FranM
          Junior Member
          • Dec 2013
          • 2
          #3
          Re: DF 780 J 93 's

          YES!!!! I vaguely remember this......Thank You!!!!!



          Originally posted by blackcat4866
          I've seen this jam code on two occasions. The first time it was caused by glossy, heavy paper ... too heavy per DF-780 finisher specs. All other paper fed fine.

          The second time it was on a DF-730, which is a similar build. The flappers that pull the paper back in for stapling tray are specifically timed to miss the side registration guides. When the flappers turn too slowly, due to friction from the bronze oil impregnated bushings, the flappers either strike the side reg guide, or block the paper path because of late timing. I disassembled the mechanical drive, cleaned and oiled the bushings (just squirting oil around randomly doesn't fix anything). Don't make the same mistake I did: On the DF-730 the flappers are actuated by a solenoid. I had the bright idea to remove the sound damping pad. It took about a year for the actuator to magnetize, allowing the flappers to make a second rotation, also causing the same jamming. Either leave the sound damping pad there, or replace it with one that isn't made of foam, for example rubber or heavy adhesive backed mylar.

          =^..^=

            Comment

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