MP 2550... SC302 Errors

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  • Foo
    Trusted Tech

    Site Contributor
    100+ Posts
    • Nov 2009
    • 199
    #1

    [Dead] MP 2550... SC302 Errors

    Setup:
    MP 2550, 261K, no past issues.

    This machine has been in my care for 3 years, with no real issues, just regular maintenance calls.

    Yesterday during a 100 page run the machine throws an SC 302.
    The customer tried rebooting, unplugging from wall.

    This morning I made the 1hour drive out to the customer.
    Using the service manual I checked the PCU connection and cleaned everything possible.
    The results were the same... SC302.

    Here's what I observed...
    At power on the SR790 setup and the Doc. Feeder could be heard spinning.
    Normally the next sound is the machine itself doing its setup routine. It failed in the first few milliseconds of setup.
    I next tried disconnecting the finisher and the doc Feeder and it failed again at the main machine setup.

    I next went into tech mode and tested the main motor and pretty much tried the whole list of items and all worked.

    So I am picking up a PCU right now and returning to the customer to at least try the PCU.

    Any ideas about this silliness? 10+ years of working on Ricoh product and I have never ran into this issue.

    All your help and ideas are appreciated!

    Jeff in STL
    Tags: None
    • rosspt
      Technician

      50+ Posts
      • Mar 2012
      • 92
      #2
      Re: MP 2550... SC302 Errors

      Those machines can get toner build up on the back frame where the drum connection is and it will short out the drum or cause grounding issues. You said you cleaned everything so I would guess the high voltage power supply. Trying a new pcu is a good guess to though.

        Comment

        • slimslob
          Retired

          Site Contributor
          25,000+ Posts
          • May 2013
          • 37062
          #3
          Re: MP 2550... SC302 Errors

          Per Goose's Guide, SC 302 is a charge level output error. Poor PCU connection or defective HVPS.

          Go to http://www.copytechnet.com/forums/ri...oose%27s+guide and download the Goose's Guide. Use it as your main trouble shooting guide for jam and error codes.

            Comment

            • laitang
              Senior Tech

              500+ Posts
              • Nov 2012
              • 627
              #4
              Re: MP 2550... SC302 Errors

              When the drum scratch or trail, it will cause charge leaking from charge roller and SC302 appear

              Try a new PCU or a new drum+charge roller

                Comment

                • Gift
                  Service Manager

                  1,000+ Posts
                  • Mar 2011
                  • 2457
                  #5
                  Re: MP 2550... SC302 Errors

                  Agree - go get a new T1027 and check that PCU connector

                    Comment

                    • Foo
                      Trusted Tech

                      Site Contributor
                      100+ Posts
                      • Nov 2009
                      • 199
                      #6
                      Re: MP 2550... SC302 Errors *SOLVED*

                      Ok, all in I'd say it was a successful day.

                      Ran 100 plus miles for a new PCU and installed it...setup went fine and machine is up and running.

                      Found some other issues the customer neglected to tell me about and had to order more parts.
                      But at least the machine (at a credit union) and their only copier is up and running.

                      Thank you for the input and suggestions...the service manual ended up being pretty much right .


                      Jeff in STL

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