Bizhub C364

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  • beaker020
    Technician

    50+ Posts
    • Mar 2006
    • 63
    #1

    Bizhub C364

    I have a customer with a Bizhub C364 that is not printing any yellow.
    A yellow gradation test print shows only faint yellow in what should be the darkest shade.

    I have changed the dev, swapped the drum with another color and tried a new HVT. All with no change.

    The ATR level is about 7% so it is in normal range.

    Any ideas?

    Thanks
    Lance
    Tags: None
    • Synthohol
      Certified Konica Expert

      Site Contributor
      5,000+ Posts
      • Mar 2016
      • 5844
      #2
      Re: Bizhub C364

      clean the laser glass with the wand, check transfer belt that the yellow roller drops down when the gear is turned.
      run a halftone yellow at 255 and stop it in front of the belt, look for image.
      clean the contacts for the 2nd xfer roller.
      We know a thing or two because we've seen a thing or two.
      The medication helps though...

        Comment

        • blackcat4866
          Master Of The Obvious

          Site Contributor
          10,000+ Posts
          • Jul 2007
          • 23009
          #3
          Re: Bizhub C364

          You might also check the white bushings at the front of the toner hopper. If enough toner gets by the rubber seal, the shaft gets hard to turn, the the toner motor will stall and vibrate. As symptoms I've seen all three: 1) Low toner density codes, 2) Add Toner messages, 3) No development, depleted developer without codes or messages. Occasionally forced toner add will get enough toner back into the developer to deceive you into thinking you've fixed something. =^..^=
          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

            • AjitN
              Trusted Tech

              250+ Posts
              • Mar 2009
              • 287
              #4
              Re: Bizhub C364

              If Dev Assy as well as drum is tested,
              only easy options left are PH unit OR ITB unit.
              If not then it could be anything like loose connection, PRCB, Firmware etc.
              Good luck

                Comment

                • iceman490
                  Technician
                  • May 2014
                  • 46
                  #5
                  Re: Bizhub C364

                  I had a similar issue a couple of months ago. Faint yellow on all copy scans and prints. Replaced mfpb scanner drive board no change. Ended up doing a ssd format and that brought the yellow back. Just do a back up before you try this

                  Sent from my SM-G930V using Tapatalk

                    Comment

                    • beaker020
                      Technician

                      50+ Posts
                      • Mar 2006
                      • 63
                      #6
                      Re: Bizhub C364

                      Turns out it was a bad connection on the ribbon cable at the PRCB leading to the Laser.
                      Reseated the connector and all is good.

                        Comment

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