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  1. #1
    just another tech 100+ Posts
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    Question Sharp MX-M623N Copying/Printing Slow

    I've been working on a 623 that runs normal out of tray 1 but not tray 2. Tray 1 copies and prints at 62 ppm like it's supposed to, but tray 2 outputs at maybe 30 ppm. It just prints slow like half speed as if it's spooling or something. It never jams or errors but sounds noticeably louder than tray 1. Louder as in it sounds like its rotating louder. It's very odd. Again, it does this for printing AND copying. Of course tray 1 and 2 are the LCTs so the teachers notice and complain.

    I've replaced feed tires, cleaned the one way coupling, checked the allen screw at the end of the feed shaft, replaced the tray 1/2 clutch drive pack with a new one. I thought for sure the clutch pack would fix it for a faulty clutch but no change. I'm a bit stumped because the trays are powered by the same motor I believe and the clutches have been replaced. Any ideas?

    I did notice today that I'm running firmware 04.02.d3 and the new is 04.04.d3. I'll update that asap but there's nothing in the readme files about any issues like this. Power is a good dedicated outlet.
    Best rule for troubleshooting.
    K I S S Keep It Simple Stupid

  2. #2
    Field Supervisor 500+ Posts
    Sharp MX-M623N Copying/Printing Slow

    mansart's Avatar
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    Re: Sharp MX-M623N Copying/Printing Slow

    Under tray settings.....are the paper types set different between tray one and two?

    Will it do an auto tray switch, between one and two?

  3. #3
    Service Manager 1,000+ Posts
    Sharp MX-M623N Copying/Printing Slow

    FrohnB's Avatar
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    Re: Sharp MX-M623N Copying/Printing Slow

    Like Mansart said, I would check Paper Type settings. it sounds like a "Thick Paper" setting for tray two, which will slow the speed down and make the "feed Noises" more noticeable.

  4. #4
    Senior Tech 250+ Posts
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    Re: Sharp MX-M623N Copying/Printing Slow

    Check tray paper type
    Run sim 50-28 setup adj all select all trays.
    Check torque limiter
    Also it is a known issue for paper feed drive units on all dragon model machines to fail for tray1. If you have any tray 1 jams replace the paper feed drive unit

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