MP7000 sc547

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  • digicor
    Service Manager

    1,000+ Posts
    • Jul 2008
    • 1136

    #1

    MP7000 sc547

    I have replaced the thrmisters, with the newer parts #s, this machine ran for 6 months no problems, 5000/10000 sheets per month
    all of a sudden i get the 547 out of the blue? I changed the thermisters again just now, its not going away, im thnking the PWS?
    I un plugged the machine for a little bit, still same code, even with the door open and the fuser pulled out?
    what can it be? and is it fixable with out sending the machine to the big dumpster in the recycle sky?
  • solorajder
    Trusted Tech
    • Jul 2010
    • 106

    #2
    Re: MP7000 sc547

    Did you reset SC code?

    Sent from my GT-I9195I using Tapatalk

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    • slimslob
      Retired

      Site Contributor
      25,000+ Posts
      • May 2013
      • 36584

      #3
      Re: MP7000 sc547

      SC 547 is a zero cross error. Either zero cross detection on the power supply or very trashy AC line voltage. If AC power is solar only, that could be the problem as solar may not be a true sine wave. Unless properly filtered, it is usually a stepped square wave which does not play nice with zero cross circuits as there is no actual zero cross.

      Comment

      • Xcelsior
        Ex-Tech
        • Jan 2017
        • 24

        #4
        Re: MP7000 sc547

        Originally posted by slimslob
        SC 547 is a zero cross error. Either zero cross detection on the power supply or very trashy AC line voltage. If AC power is solar only, that could be the problem as solar may not be a true sine wave. Unless properly filtered, it is usually a stepped square wave which does not play nice with zero cross circuits as there is no actual zero cross.
        As Slime mentioned, check the power supply or power line.
        The other thing is to make sure the thermistor wires aren't pinched/damaged. If the metal bracket pinches one too tightly and gets through the sheath it can cause Zero-Cross errors.

        Makes sure the wires are in good shape then enter SP mode, door open, reset machine. If it won't clear, start checking the power for noise.
        Previous Ricoh Field Service Tech II - November 2017.

        Comment

        • MIKON
          Trusted Tech

          100+ Posts
          • Jul 2015
          • 183

          #5
          Re: MP7000 sc547

          Check the heat lamp connectors make sure the blue connector is connected to blue terminal and green is connected to green terminal.

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