Question about Fellowes DM8C Cross-Cut Shredder

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Fellows paper shredder

I have a shredder that will work in reverse but not forward
It does not have a paper feed switch
It has a led receiver in the paper feed slot
Can i replace that or does the whole board need to be replaced
Please help if you can
It has been a good machine but I am comfortable to buy a new one
Thanks again
greg

Posted by on

  • Anonymous Jun 11, 2008

    My fellowes DM8C paper shredder will not except any paper. It will work in reverse only. I have cleaned all paper out of the cutting blades. Please help.



    Harold Alport

    alpo29@sbcglobal.net

  • dave314usa Aug 02, 2008

    Equipment: Fellowes DM8C Shredder.
    Current symptom: Appropriate LEDs on, however, reverse direction only.

    History: Had paper jam, hit reverse and then forward in quick succession. Shredder dead. No lites, no motion. Fuse o.k. Fellowes will not provide "propitiatory" schematic on this discontinued model. Traced relevant PCB circuit. Low voltage DC supply pulled to ground through defective quad Op-Amp (LM324). Replaced Op-amp (also installed a socket). Now LEDs come on and the reverse function works.

    Trouble shooting:
    1) Hmm, if optics were dirty, shredder would always be on.
    2) More circuit tracing reveals that a Triac must turn on for forward operation, but, not for reverse.
    3) Side tracking... The 16uf 250vac cap used for the "second" ac phase on the motor does not give a "kick" on my ohm meter when test leads are alternated between leads of cap (out of circuit). However, motor won't move with out cap in circuit. Note: Cap is in series with 10ohm winding for reverse operation. And in series with 18ohm winding for forward. So, cap is likely o.k.
    4) Flipping the motor windings (two outer leads of motor connector) allows the shredder to run forward while the reverse contacts of the switch are closed.

    Short term "fix": Flip motor coils AND flip DPDT center off switch around in it's socket to allow continuous operation in forward. (The switch has a momentary position labeled "R".

    Comment: How hot the motor might get remains to be seen. But, trying to trace the circuit from optical sensor through the Op-amp and transister string to the Triac is getting old. Will do live testing of circuit another day.

    Questions:
    1) What should my DVM show for resistance on the triac?
    2) How long might I get away with reversing the windings?

    Contact: Dave314usa@yahoo.com



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So where do I buy a Fellows DMS8c paper shedder blade? I hate to have to buy a new shredder when this one was a good one, just needs a new blade. Please advise.

mhwego@comcast.net

Posted on Jul 12, 2008

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Shreader is stuck in reverse

Posted on Aug 07, 2009

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First try to clean those sensors with a qtip dipped in rubbing alchohol if that does not work call 1-800-945-4545 to check for part availability.

Posted on Apr 07, 2008

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