bizhub C250i foggy backgroud printout

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  • jwai
    Trusted Tech

    250+ Posts
    • May 2018
    • 497
    #1

    bizhub C250i foggy backgroud printout

    Hi everybody,

    One customer reported that the color printout has a bit foggy background, compare with B/W one.
    The color drums have 60% something and 30% something on black drum.
    The machine takes 40K color and 140K black counters.

    Any idea about this issue? thanks.
    Attached Files
    Tags: black, color, foggy, printout
    • Synthohol
      Certified Konica Expert

      Site Contributor
      5,000+ Posts
      • Mar 2016
      • 5461
      #2
      Re: bizhub C250i foggy backgroud printout

      i dont see anything wrong.
      you can always reset and stabilize then do the gradations 3 times each and see if it changes but frankly, im missing where the problem is.
      We know a thing or two because we've seen a thing or two.
      The medication helps though...

        Comment

        • jwai
          Trusted Tech

          250+ Posts
          • May 2018
          • 497
          #3
          Re: bizhub C250i foggy backgroud printout

          Sorry, I sent a new sample for reference.
          Attached Files

            Comment

            • CP-1015
              Trusted Tech

              Site Contributor
              250+ Posts
              • Nov 2020
              • 285
              #4
              Re: bizhub C250i foggy backgroud printout

              Is your cyan TCR-value ok?

                Comment

                • Dickie
                  Trusted Tech

                  100+ Posts
                  • Nov 2011
                  • 189
                  #5
                  Re: bizhub C250i foggy backgroud printout

                  I believe there is a firmware upgrade to cure a problem with too much cyan.
                  A previous firmware upgrade caused the issue and it was then upgraded again to cure the issue
                  This was on Develop but I assume KM initiated it.

                    Comment

                    • Albonline
                      Service Manager

                      1,000+ Posts
                      • Sep 2008
                      • 1098
                      #6
                      Re: bizhub C250i foggy backgroud printout

                      the cyan developer looks over toned. what do the halftone outputs look like?

                        Comment

                        • Cantechman
                          Trusted Tech

                          Site Contributor
                          100+ Posts
                          • Nov 2008
                          • 224
                          #7
                          Re: bizhub C250i foggy backgroud printout

                          Originally posted by jwai
                          Hi everybody,

                          One customer reported that the color printout has a bit foggy background, compare with B/W one.
                          The color drums have 60% something and 30% something on black drum.
                          The machine takes 40K color and 140K black counters.

                          Any idea about this issue? thanks.
                          you can try this:
                          change switch 153 bit 6

                          under pcl driver:
                          quality tab/quality adjustment/other/turn pure black off

                            Comment

                            • jwai
                              Trusted Tech

                              250+ Posts
                              • May 2018
                              • 497
                              #8
                              Re: bizhub C250i foggy backgroud printout

                              Originally posted by CP-1015
                              Is your cyan TCR-value ok?
                              CYMK all 6.XX%

                                Comment

                                • Synthohol
                                  Certified Konica Expert

                                  Site Contributor
                                  5,000+ Posts
                                  • Mar 2016
                                  • 5461
                                  #9
                                  Re: bizhub C250i foggy backgroud printout

                                  before all that, try just simply calibrating it like i suggested above.
                                  We know a thing or two because we've seen a thing or two.
                                  The medication helps though...

                                    Comment

                                    • tsbservice
                                      Field tech

                                      Site Contributor
                                      5,000+ Posts
                                      • May 2007
                                      • 7635
                                      #10
                                      Re: bizhub C250i foggy backgroud printout

                                      What's FW version? Your threads seems always lack valuable/basic information.
                                      Pulling other tech teeth is so much uncomfortable
                                      A tree is known by its fruit, a man by his deeds. A good deed is never lost, he who sows courtesy, reaps friendship, and he who plants kindness gathers love.
                                      Blessed are they who can laugh at themselves, for they shall never cease to be amused.

                                        Comment

                                        • Phil B.
                                          Field Supervisor

                                          10,000+ Posts
                                          • Jul 2016
                                          • 22808
                                          #11
                                          Re: bizhub C250i foggy backgroud printout

                                          Originally posted by tsbservice
                                          What's FW version? Your threads seems always lack valuable/basic information.
                                          Pulling other tech teeth is so much uncomfortable
                                          Hell the " Dentist " doesn't mind one bit.. for those that get queasy at the sight of blood don't watch![emoji38][emoji28][emoji1787]

                                          Sent from my SM-G960U using Tapatalk

                                            Comment

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