Pattern of C2840 and C1950 Errors

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  • Cosmortal
    Service Tech
    • Oct 2023
    • 8

    #1

    [Error Code] Pattern of C2840 and C1950 Errors

    Hello, I am new to posting but I use this site alot in my endeavors.

    Recently in the last couple months we have been seeing a pattern of these codes (c1950 and c2840). It happens especially when changing a Maintenance Kit. The new transfer belt goes in like normal but on reboot it pops a "c2840". Then after a restarts it throws "c1950" every power up. A 906 can help but if you need to touch or pull out transfer belt its very likely to happen again and on one machine i saw it completely freeze when trying to M906 or check M122 Serial.

    Aside from changing a MK, I was on a service call yesterday checking Image Quality and pulled out the transfer belt. It wasn't rough or forceful. I reseated it and the code 2840 hit on power up, then 1950 on restart every time after that. The temporary fix to this for us was to put spacers on the maintenance door latch to put more pressure on the Transfer belt so it seats properly.

    So what changed? Each time this problem happened I tested with different Transfer belts too.

    I checked all the pins and connections for each machine this has happened to us on with no visible damages. The first machine I witnessed this happen; A simple 906 and reseat fixed it temporarily before coming back next time the transfer was touched.

    Just wondering why I am starting to see a trend with this particular problem or if its a newer defect. The machines I have seen this on are 408, 6053, and 3553.
  • dalewb74
    Service Manager

    Site Contributor
    1,000+ Posts
    • Feb 2018
    • 1125

    #2
    Re: Pattern of C2840 and C1950 Errors

    are you turning off the machine before replacing the MK?

    Comment

    • Cosmortal
      Service Tech
      • Oct 2023
      • 8

      #3
      Re: Pattern of C2840 and C1950 Errors

      yes

      Comment

      • KYO_OEM
        Senior Tech

        500+ Posts
        • Aug 2011
        • 704

        #4
        Re: Pattern of C2840 and C1950 Errors

        we have had harness on transfer connect pcbs or bent pin on belt pcbs.
        Meanwhile i have well working belt pcb for testing.
        Unplug both connectors at the belt, guide both wirings out of the cable guides and connect own belt pcb
        Remove toner cover
        Insert belt 3/4 way
        By long small fingers you can connect your own pcb to the transfer connect pcb.
        After startup with open conveying and front cover, you can enter U122 for checking from serialnumber.
        number visible --> belt pcb broken/ check pin 1-4 for damage or harness (pin 1/ belt SDA + pin 4/ belt SCL--> Eeprom communication line, Pin 10/ 24V for cleaning motor)
        no number visible --> mostly transfer connect pcb broken

        Comment

        • BBM
          Senior Tech

          500+ Posts
          • Dec 2020
          • 854

          #5
          Re: Pattern of C2840 and C1950 Errors

          Are you having difficulties pushing the transfer belt back in ? sometimes the rails will get bent .

          Comment

          • Cosmortal
            Service Tech
            • Oct 2023
            • 8

            #6
            Re: Pattern of C2840 and C1950 Errors

            Originally posted by BBM
            Are you having difficulties pushing the transfer belt back in ? sometimes the rails will get bent .
            Not difficult to put back in or any resistance. Removed it with side door open as normal too.

            Comment

            • Cosmortal
              Service Tech
              • Oct 2023
              • 8

              #7
              Re: Pattern of C2840 and C1950 Errors

              Originally posted by KYO_OEM
              we have had harness on transfer connect pcbs or bent pin on belt pcbs.
              Meanwhile i have well working belt pcb for testing.
              Unplug both connectors at the belt, guide both wirings out of the cable guides and connect own belt pcb
              Remove toner cover
              Insert belt 3/4 way
              By long small fingers you can connect your own pcb to the transfer connect pcb.
              After startup with open conveying and front cover, you can enter U122 for checking from serialnumber.
              number visible --> belt pcb broken/ check pin 1-4 for damage or harness (pin 1/ belt SDA + pin 4/ belt SCL--> Eeprom communication line, Pin 10/ 24V for cleaning motor)
              no number visible --> mostly transfer connect pcb broken
              Thank you for some direction. Ill give that a go when I have the time!

              Comment

              • fishleg
                Trusted Tech

                Site Contributor
                250+ Posts
                • Mar 2009
                • 426

                #8
                Re: Pattern of C2840 and C1950 Errors

                I've seen this a lot what works for me is the white connector machine side bend it upwards slightly. Too much and it will snap so only bend a little upwards works every time for me.

                I've also had dry solder joints on that connector as well.

                Comment

                • Cosmortal
                  Service Tech
                  • Oct 2023
                  • 8

                  #9
                  Re: Pattern of C2840 and C1950 Errors

                  Originally posted by fishleg
                  I've seen this a lot what works for me is the white connector machine side bend it upwards slightly. Too much and it will snap so only bend a little upwards works every time for me.

                  I've also had dry solder joints on that connector as well.

                  Interesting, ill give this a shot next time i get the code too. Thanks for the input!

                  Comment

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