KM C250 to much black

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • vlad_robas
    Trusted Tech
    100+ Posts
    • Oct 2006
    • 225
    #1

    KM C250 to much black

    Hello,
    I'm Sharp tech I don't usualy do KM, other than our C6500.

    I have a customer with this machine and about few month's ago I have replaced black unit with a new one but at that moment I haven't done any adjustment.
    But is way to much toner on the page, see atach.

    What can I do now to lower toner level in the unit?C250 BLACK.pdfC250 BLACK.pdf
    Tags: None
    • Copier Addict
      Aging Tech

      Site Contributor
      10,000+ Posts
      • Jul 2013
      • 14067
      #2
      Re: KM C250 to much black

      Start with go into service mode and running "initialize/stabilize" Then run "gradation"

        Comment

        • Kurtillton
          HP Service Manager
          • Apr 2015
          • 19
          #3
          Re: KM C250 to much black

          Hello,

          This could be a number of issues, try going on to maintenance mode and adjust the gradation with in +/- 100
          "It's not working"
          "Have you tried sacrificing a small child?"

            Comment

            • vlad_robas
              Trusted Tech
              100+ Posts
              • Oct 2006
              • 225
              #4
              Re: KM C250 to much black

              I'm in the right place?IMG_20150923_160851 2.jpg
              This is actualy an OCE 171 but it is working with C250 supllies.
              "initialize/stabilize" and "gradation" didn't help
              I can't find tech rep mode.

                Comment

                • blackcat4866
                  Master Of The Obvious

                  Site Contributor
                  10,000+ Posts
                  • Jul 2007
                  • 22870
                  #5
                  Re: KM C250 to much black

                  Originally posted by vlad_robas
                  I'm in the right place?[ATTACH=CONFIG]30727[/ATTACH]
                  This is actualy an OCE 171 but it is working with C250 supllies.
                  "initialize/stabilize" and "gradation" didn't help
                  I can't find tech rep mode.
                  I think you just did.

                  What was it that you were trying to fix? The image looks fine to me. =^..^=
                  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

                    • vlad_robas
                      Trusted Tech
                      100+ Posts
                      • Oct 2006
                      • 225
                      #6
                      Re: KM C250 to much black

                      Originally posted by blackcat4866
                      I think you just did.

                      What was it that you were trying to fix? The image looks fine to me. =^..^=
                      As I stated early im not realy god with km but there is way to much black on the print, then is trowing 2557 error and cartridge is doing only 1/4 pages than before replacemet of the unit.

                        Comment

                        • DelawareJim
                          Technician

                          Site Contributor
                          50+ Posts
                          • Jan 2008
                          • 65
                          #7
                          Re: KM C250 to much black

                          To lower the percentage of black toner in the black image unit: Enter the Service Mode, choose Image Process Adjustment, and then TCR Toner Supply. Choose Black and then choose a lower number. This may help your situation.
                          You can also lower the amount of toner used to make a copy by going into Service Mode and choose Image Process Adjustment. Choose D Max Density and choose black. The number shown should be a zero. The adjustment range goes form -10 to a +10. If it is already on 0, try a negative 5. This will apply less black.
                          One more thing to check, Service Mode, choose Background Voltage Margin and make sure that all colors including black are set to zero.
                          Also, when the manufacturer states a toner yield, for example 20,000 pages per cartridge, it is based upon a 5 percent black area on each copy. This is the old fashioned double spaced typewritten page. In today's world, most copies and prints use way more than that....we anticipate the yield to be about half of whatever the manufacturer states.

                            Comment

                            • peter@digitalswebsite.com
                              Technician
                              • Aug 2012
                              • 29
                              #8
                              Re: KM C250 to much black

                              Pull the black image unit and transfer belt, clean the sensor , looks like a cleaning lamp sits right under the transfer belt by the black IU, then run gradation, there is also a black plastic film that covers that lamp/sensor, I have seen those come off

                                Comment

                                Previous template Next
                                Working...