KM2550 Not adding toner

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  • bayshoreoe
    Technician
    • Jun 2015
    • 44
    #1

    KM2550 Not adding toner

    Hi all, Have this machine that won't add toner, has 24V at the pin, but not across motor leads. Just did a Maintenance kit about 3 months ago then this started. No motor movement in sim 130 or 133. Will diplay add toner or toner empty when DV unit gets low. I manually add toner to DV unit to keep them going for a while. Machine has about 180k on it. New motor did not help, I'm thinking engine board but would like input before ordering one.
    Brian
    Tags: None
    • blackcat4866
      Master Of The Obvious

      Site Contributor
      10,000+ Posts
      • Jul 2007
      • 22973
      #2
      Re: KM2550 Not adding toner

      If your new motor is not getting the voltage it must be an engine board. My first instinct was to check the toner cartridge drive coupler. Often Copystar/Kyocera toner cartridges look similar, but the actual coupler is different. If you're not getting voltage that's another matter. =^..^=
      If you'd like a serious answer to your request:
      1) demonstrate that you've read the manual
      2) demonstrate that you made some attempt to fix it.
      3) if you're going to ask about jams include the jam code.
      4) if you're going to ask about an error code include the error code.
      5) You are the person onsite. Only you can make observations.

      blackcat: Master Of The Obvious =^..^=

        Comment

        • bayshoreoe
          Technician
          • Jun 2015
          • 44
          #3
          Re: KM2550 Not adding toner

          Sorry I didn't mention that in the first post, cartridge and coupler are the same, I am leaning to engine board, the only problem I see is that I get 24V at connector without the motor connected, but don't get voltage across motor leads with motor connected. It's been a long time since I troubleshot boards, but know the voltage may be present, but under a load there isn't.

          Brian

            Comment

            • blackcat4866
              Master Of The Obvious

              Site Contributor
              10,000+ Posts
              • Jul 2007
              • 22973
              #4
              Re: KM2550 Not adding toner

              I think the way I would approach this is to disconnect the motor from the wire harness and read resistance across the motor, then resistance each lead to frame ground. As a guess I would expect something like 64 ohms across the motor and open to frame ground.

              Then I would connect the harness and measure again.

              Since the MFP is ground switching, with the motor off you will see 24vdc from either leg to frame ground. When the engine board turns on the motor, you'll see one leg go to ground, so the voltage across the motor leads will increase to 24vdc. I'd use sim U130 to turn it on.

              You should be able to run the toner motor in U030 also.

              Does any of that help? =^..^=
              If you'd like a serious answer to your request:
              1) demonstrate that you've read the manual
              2) demonstrate that you made some attempt to fix it.
              3) if you're going to ask about jams include the jam code.
              4) if you're going to ask about an error code include the error code.
              5) You are the person onsite. Only you can make observations.

              blackcat: Master Of The Obvious =^..^=

                Comment

                • kkendric
                  Trusted Tech

                  250+ Posts
                  • Apr 2009
                  • 301
                  #5
                  Re: KM2550 Not adding toner

                  A transistor fries on the engine board.

                    Comment

                    • Gar the pilot
                      #6
                      Re: KM2550 Not adding toner

                      We used to see problems like that on the Old 3 digit machines and it was almost the power-supply. Most recent one was a 4 digit 6330 power supply.

                        Comment

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