KM-4230 - Noise and Copies with bad quality

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  • mrwho
    Major Asshole!

    Site Contributor
    2,500+ Posts
    • Apr 2009
    • 4299
    #1

    [Misc] KM-4230 - Noise and Copies with bad quality

    Hello there guys.

    I'm not a Kyocera guy (I deal more with Konica Minoltas and Ricohs), but I'm about to go out and see a customer with a machine that, according to him, makes an abnormal noise when starting up and has copies with bad quality.

    What I'd like to ask is what kind of problems am I expected to find on this specific model, and what are the most troublesome spots about it.

    I don't have this machine service manual yet, but I have other model's. Is the procedure to enter service mode the same across the board?

    Thanks and cheers!
    ' "But the salesman said . . ." The salesman's an asshole!'
    Mascan42

    'You will always find some Eskimo ready to instruct the Congolese on how to cope with heat waves.'
    Ibid

    I'm just an ex-tech lurking around and spreading disinformation!
    Tags: None
    • Metalvoc
      Trusted Tech

      100+ Posts
      • Sep 2008
      • 155
      #2
      Re: KM-4230 - Noise and Copies with bad quality

      That's pretty vague, but the big quality problem with these machines was coronas. The toner cartridge has a tendency to spew toner out the back, directly into the MC unit. Cleaning the grid and corona will often do the trick, but I tended to replace the MC and transfer coronas in these fairly often.

      As to the noise - Is it a squeaker or a grinder?
      I must have a prodigious quantity of mind; it takes me as much as a week sometimes to make it up - Mark Twain

        Comment

        • mrwho
          Major Asshole!

          Site Contributor
          2,500+ Posts
          • Apr 2009
          • 4299
          #3
          Re: KM-4230 - Noise and Copies with bad quality

          There was a last minute change and one of my colleagues went there instead of me. Nevertheless I'll mention this thread to him and let him chime in if the need arises.

          Thank you so much for your tips. Cheers!
          ' "But the salesman said . . ." The salesman's an asshole!'
          Mascan42

          'You will always find some Eskimo ready to instruct the Congolese on how to cope with heat waves.'
          Ibid

          I'm just an ex-tech lurking around and spreading disinformation!

            Comment

            • Metalvoc
              Trusted Tech

              100+ Posts
              • Sep 2008
              • 155
              #4
              Re: KM-4230 - Noise and Copies with bad quality

              no problem. you get into the maintenance mode the same on almost all Kyocera's. This one is no different.
              I must have a prodigious quantity of mind; it takes me as much as a week sometimes to make it up - Mark Twain

                Comment

                • O sentinela
                  Technician
                  • Nov 2010
                  • 20
                  #5
                  Re: KM-4230 - Noise and Copies with bad quality

                  hello. I'm the guy who went to see kyocera. I could go into technical mode. the machine showed defects in repeated copies which I suspect is the drum. but the noise could not identify very well ... it's like a "sizzle" I think the wheels come from the wheels of the fusing. any ideas??

                    Comment

                    • mrwho
                      Major Asshole!

                      Site Contributor
                      2,500+ Posts
                      • Apr 2009
                      • 4299
                      #6
                      Re: KM-4230 - Noise and Copies with bad quality

                      Originally posted by O sentinela
                      hello. I'm the guy who went to see kyocera. I could go into technical mode. the machine showed defects in repeated copies which I suspect is the drum. but the noise could not identify very well ... it's like a "sizzle" I think the wheels come from the wheels of the fusing. any ideas??
                      By "sizzle" do you mean a "squeaking" noise, like a wheel without proper lubrification?
                      ' "But the salesman said . . ." The salesman's an asshole!'
                      Mascan42

                      'You will always find some Eskimo ready to instruct the Congolese on how to cope with heat waves.'
                      Ibid

                      I'm just an ex-tech lurking around and spreading disinformation!

                        Comment

                        • O sentinela
                          Technician
                          • Nov 2010
                          • 20
                          #7
                          Re: KM-4230 - Noise and Copies with bad quality

                          yes!

                            Comment

                            • logrady2331
                              Trusted Tech

                              250+ Posts
                              • Feb 2011
                              • 301
                              #8
                              Re: KM-4230 - Noise and Copies with bad quality

                              The "sizzle" is more than likely an arcing corona block, probably main charge rear. Look for white residue in and around blocks and also smell them. If they smell a little burnt, they're arcing to ground. Could also be the MC Grid contacting the drum but you would see the grid pattern on the copies. Emergency fix for arcing coronas is to insulate with electrical tape between block and metal channel. Could also be the MC/DEV power pack itself but I would look there last.

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