laser unit KM-8030

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  • dikyo
    Technician
    • Apr 2011
    • 45
    #1

    laser unit KM-8030

    Hi ,

    We have a customer with a KM-8030 ,they have already made more than 4.000.000 prints.
    the machine works fine but there is one big issue.
    We have replaced the laser unit (LK-650B) 7 times, because c4200 en C4120 codes.(resetting no possible)
    When I replaced the LK ,I set the 3 values in U472 ,then everyting looks fine an after a couple of months (2-8) the errorcodes are coming back.

    Every suggestion is welcome
    Tags: None
    • Zackuth
      Trusted Tech

      250+ Posts
      • Aug 2009
      • 448
      #2
      Re: laser unit KM-8030

      I had this problem with a 8030 once. The new laser threw the same code and answer for me was to replace the charge grid. You might want to try that and perhaps the entire charge unit and see if that helps.
      If at first you don't succeed, redefine success

        Comment

        • Geo
          Senior Tech

          500+ Posts
          • Nov 2010
          • 662
          #3
          Re: laser unit KM-8030

          Check the DV unit frame ground, they ware out.

            Comment

            • blackcat4866
              Master Of The Obvious

              Site Contributor
              10,000+ Posts
              • Jul 2007
              • 23008
              #4
              Re: laser unit KM-8030

              Originally posted by Geo
              Check the DV unit frame ground, they ware out.
              Like Geo, I've had the developing bias contact on the imaging frame rear cause this code. Just remove the developing unit and examine the contact at the rear that contacts the end of the mag roller.

              Do not use any kind of lubrication on this connection. It will cause light or blank prints intermittently. =^..^=
              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

                • dikyo
                  Technician
                  • Apr 2011
                  • 45
                  #5
                  Re: laser unit KM-8030

                  Hi,

                  Thanks guys,
                  I am gonna back next week to the customer and check the developer ground.
                  Hopefully is the 8th laser unit not necessary.

                    Comment

                    • blackcat4866
                      Master Of The Obvious

                      Site Contributor
                      10,000+ Posts
                      • Jul 2007
                      • 23008
                      #6
                      Re: laser unit KM-8030

                      Watch for something like this:

                      Bias Contact1.JPG

                      There is also a tech pub regarding faulty wiring harnesses, and improper wire routing. Be sure to read up on that before you head out.
                      =^..^=
                      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

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