Mx3140n l4-12 and f2-58 at the same time

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  • Andypraeuner
    Technician
    • Jun 2013
    • 30
    #1

    Mx3140n l4-12 and f2-58 at the same time

    I have a MX3140N that the customer called and said she was printing checks from the by-pass tray when it jammed and showed the L4-12 code.
    When she removed the jam and closed the door to continue it would not detect paper or the size in the by-pass tray. At the same time it sent us the alert via email that it had the L4-12 and the F2-58 codes. The L4-12 deals with the secondary tansfer separation and the F2-58 deals with the temp/humidity sensor, both in the right side door. I see in the manual that both codes have a remedy of replacing the PCU PWB. One of our other tecks suggests just replacing the secondary transfer unit but I am leaning towards swapping out the whole right side door to see if that will fix or if it will be the PCU PWB. Does any one have any other advice? Thanks in advance.
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    • mttech
      Trusted Tech

      100+ Posts
      • Mar 2014
      • 127
      #2
      Re: Mx3140n l4-12 and f2-58 at the same time

      If you have the extra parts available it can't hurt to take them with you. Try to clear the codes before changing out parts.

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        • Andypraeuner
          Technician
          • Jun 2013
          • 30
          #3
          Re: Mx3140n l4-12 and f2-58 at the same time

          FYI update. When I arrived on site I had a few ideas on what to look at first, second, third...etc. Discovered that none of these were the problem. The customer had removed a jam after the machine threw a C4-00 code, she then closed the right side door a little to agressively and the door connector jammed the frame connector into the bracket that holds it in place and bent that bracket as well. I took the bracket out straightened it and put it all back together then replaced the TC PWB and all is good.

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            • SwisSeV
              Trusted Tech

              250+ Posts
              • Jan 2016
              • 307
              #4
              Re: Mx3140n l4-12 and f2-58 at the same time

              Ahh yes, I just had to replace TC PWB on friday and will have to do another at the end of this week. There is a problem with these boards in case you didn't know, refer to MFP-TB-1084.

              Real annoying board to get at.

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                • Andypraeuner
                  Technician
                  • Jun 2013
                  • 30
                  #5
                  Re: Mx3140n l4-12 and f2-58 at the same time

                  Ya they aren't too easy, I have had to replace quite a few with the new updated board due to the C4-00 code. Part # RDENU0154FCP2

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