C300i - Color Cast on Scans

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  • mkonkelz
    Technician

    Site Contributor
    • Dec 2019
    • 49

    #16
    Re: C300i - Color Cast on Scans

    Originally posted by qbert69
    See if there is a setting to change auto color detection sensitivity!!! I have used other scanners, not just KM that when B&W is scanned in color, there will be a slight magenta cast which is related to the green sensor array in the CCD array!!! Make sure your glass & white balance strip are CLEAN!!! Check your auto detection sensitivity!!![emoji41][emoji1303]

    Sent from my SM-N950U1 using Tapatalk
    Glass and strip are clean. I will search for an auto detection sensitivity setting and check it.

    Edit: I am scanning color in color. It also appers on a scans with pictures and vibrant colors.

    Comment

    • qbert69
      Service Manager

      1,000+ Posts
      • Mar 2013
      • 1152

      #17
      Re: C300i - Color Cast on Scans

      Originally posted by mkonkelz
      Glass and strip are clean. I will search for an auto detection sensitivity setting and check it.
      Check the easy stuff before you start replacing parts!!![emoji41][emoji1303]

      Sent from my SM-N950U1 using Tapatalk
      REACH FOR THE STARS!!!
      Konica Minolta Planetariums!
      https://www.konicaminolta.com/planet...gma/index.html

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      • Albonline
        Service Manager

        1,000+ Posts
        • Sep 2008
        • 1151

        #18
        Re: C300i - Color Cast on Scans

        Originally posted by mkonkelz
        It is brand new (1 week old).

        I will try it out, but the system got set up by the dealer (it had the right date and time configured on delivery).

        you paid for a working unit, get the dealer to fix this!

        Comment

        • qbert69
          Service Manager

          1,000+ Posts
          • Mar 2013
          • 1152

          #19
          Re: C300i - Color Cast on Scans

          Originally posted by mkonkelz
          It is brand new (1 week old).

          I will try it out, but the system got set up by the dealer (it had the right date and time configured on delivery).
          I'd be curious to see what the internal color test page looks like directly from the engine!!![emoji848]

          Sent from my SM-N950U1 using Tapatalk
          REACH FOR THE STARS!!!
          Konica Minolta Planetariums!
          https://www.konicaminolta.com/planet...gma/index.html

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          • mkonkelz
            Technician

            Site Contributor
            • Dec 2019
            • 49

            #20
            Re: C300i - Color Cast on Scans

            Originally posted by qbert69
            I'd be curious to see what the internal color test page looks like directly from the engine!!![emoji848]

            Sent from my SM-N950U1 using Tapatalk
            Prints look fine, and also the test printouts from the service menu for color adjustment look great.

            What test page do you mean?

            Comment

            • qbert69
              Service Manager

              1,000+ Posts
              • Mar 2013
              • 1152

              #21
              Re: C300i - Color Cast on Scans

              Originally posted by mkonkelz
              Prints look fine, and also the test printouts from the service menu for color adjustment look great.

              What test page do you mean?
              Ok. Just making sure! Sometimes if D-Min & D-Max are not calibrated correctly, you can have weird things happen!!![emoji41][emoji1303]

              Sent from my SM-N950U1 using Tapatalk
              REACH FOR THE STARS!!!
              Konica Minolta Planetariums!
              https://www.konicaminolta.com/planet...gma/index.html

              Comment

              • Albonline
                Service Manager

                1,000+ Posts
                • Sep 2008
                • 1151

                #22
                Re: C300i - Color Cast on Scans

                this is a color detection issue, do the calibration adjustments if it still persists, most probably poor connection in the ccd circuit, could be ccd optical alignment, bent scanner, misaligned/loose dislodged mirror.

                Comment

                • qbert69
                  Service Manager

                  1,000+ Posts
                  • Mar 2013
                  • 1152

                  #23
                  Re: C300i - Color Cast on Scans

                  Originally posted by Albonline
                  this is a color detection issue, do the calibration adjustments if it still persists, most probably poor connection in the ccd circuit, could be ccd optical alignment, bent scanner, misaligned/loose dislodged mirror.
                  Think Simple...B&W/Color Auto-detect threshold. Magenta background related to the green sensor in the CCD. I believe he said the magenta toning of the background was consistent across the page![emoji41][emoji1303] Remember!!! He SAID *AUTO-DETECT* was TURNED ON for SCANNING!!!

                  Sent from my SM-N950U1 using Tapatalk
                  REACH FOR THE STARS!!!
                  Konica Minolta Planetariums!
                  https://www.konicaminolta.com/planet...gma/index.html

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                  • qbert69
                    Service Manager

                    1,000+ Posts
                    • Mar 2013
                    • 1152

                    #24
                    Re: C300i - Color Cast on Scans

                    IF the paper you are scanning contains "Optical Brighteners" (additives to make the paper whiter/brighter, mostly towards the blue spectrum, sometimes fluoresing to some degree under a particular light source!!!) it's possible that with the scanner, it is picking up this reflective color cast and (mis)interpreting it as having a "background". In the case of LED's as a light source the color cast they exhibit is called "binning"...

                    A Look at the Past and Future of LED Binning - Lumenpulse

                    Sent from my SM-N950U1 using Tapatalk
                    REACH FOR THE STARS!!!
                    Konica Minolta Planetariums!
                    https://www.konicaminolta.com/planet...gma/index.html

                    Comment

                    • mkonkelz
                      Technician

                      Site Contributor
                      • Dec 2019
                      • 49

                      #25
                      Re: C300i - Color Cast on Scans

                      Originally posted by qbert69
                      IF the paper you are scanning contains "Optical Brighteners" (additives to make the paper whiter/brighter, mostly towards the blue spectrum, sometimes fluoresing to some degree under a particular light source!!!) it's possible that with the scanner, it is picking up this reflective color cast and (mis)interpreting it as having a "background". In the case of LED's as a light source the color cast they exhibit is called "binning"...

                      A Look at the Past and Future of LED Binning - Lumenpulse

                      Sent from my SM-N950U1 using Tapatalk

                      The problem occurs with different papers. Also when scanning recycling paper and newspapers for example.

                      Comment

                      • qbert69
                        Service Manager

                        1,000+ Posts
                        • Mar 2013
                        • 1152

                        #26
                        Re: C300i - Color Cast on Scans

                        Originally posted by mkonkelz
                        The problem occurs with different papers. Also when scanning recycling paper and newspapers for example.
                        Make a preset for newspapers with the bleed thru removal detect turned on!!! It's under the scanning application choices and should be listed as "Bkgd. Removal" or "Bleed Removal"...you will be able to adjust the amount of background removal!!!


                        Sent from my SM-N950U1 using Tapatalk
                        REACH FOR THE STARS!!!
                        Konica Minolta Planetariums!
                        https://www.konicaminolta.com/planet...gma/index.html

                        Comment

                        • mkonkelz
                          Technician

                          Site Contributor
                          • Dec 2019
                          • 49

                          #27
                          Re: C300i - Color Cast on Scans

                          Originally posted by qbert69
                          Make a preset for newspapers with the bleed thru removal detect turned on!!! It's under the scanning application choices and should be listed as "Bkgd. Removal" or "Bleed Removal"...you will be able to adjust the amount of background removal!!!


                          Sent from my SM-N950U1 using Tapatalk
                          I have tried it with bleed removal and discoloration adjustment both turned off and on. It`s still the same.
                          My standard setting for both would be "off" / 0 Standard.

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                          • qbert69
                            Service Manager

                            1,000+ Posts
                            • Mar 2013
                            • 1152

                            #28
                            Re: C300i - Color Cast on Scans

                            Originally posted by mkonkelz
                            I have tried it with bleed removal and discoloration adjustment both turned off and on. It`s still the same.
                            My standard setting for both would be "off" / 0 Standard.
                            Have you selected and been using the "bleed removal" when scanning newspapers???[emoji848]

                            Sent from my SM-N950U1 using Tapatalk
                            REACH FOR THE STARS!!!
                            Konica Minolta Planetariums!
                            https://www.konicaminolta.com/planet...gma/index.html

                            Comment

                            • qbert69
                              Service Manager

                              1,000+ Posts
                              • Mar 2013
                              • 1152

                              #29
                              Re: C300i - Color Cast on Scans

                              Originally posted by mkonkelz
                              I have tried it with bleed removal and discoloration adjustment both turned off and on. It`s still the same.
                              My standard setting for both would be "off" / 0 Standard.
                              Just sent you a PM so you can send me a sample via e-mail!!![emoji41][emoji1303]

                              Sent from my SM-N950U1 using Tapatalk
                              REACH FOR THE STARS!!!
                              Konica Minolta Planetariums!
                              https://www.konicaminolta.com/planet...gma/index.html

                              Comment

                              • mkonkelz
                                Technician

                                Site Contributor
                                • Dec 2019
                                • 49

                                #30
                                Re: C300i - Color Cast on Scans

                                Originally posted by qbert69
                                Have you selected and been using the "bleed removal" when scanning newspapers???[emoji848]

                                Sent from my SM-N950U1 using Tapatalk
                                Normally i don`t use bleed removal, but for test purposes on this i did, and nothing changed.

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