c458 white spots on print

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  • Carlos Rego
    Technician
    • Mar 2024
    • 40
    #1

    c458 white spots on print

    Hi guys
    Shadows or white spots appear on the prints . what may it be ?
    Attached Files
    Tags: None
    • Cantechman
      Trusted Tech

      Site Contributor
      100+ Posts
      • Nov 2008
      • 227
      #2
      Originally posted by Carlos Rego
      Hi guys
      Shadows or white spots appear on the prints . what may it be ?
      Did you do test prints for each color in service mode? It's probably a worn out black drum but color test prints of each color should help narrow it down.

        Comment

        • copyman
          Owner / Technician

          Site Contributor
          2,500+ Posts
          • Sep 2005
          • 4612
          #3
          If it's happening on all colors I would suspect transfer belt. What are consumable life counters? If just one color then look at drum, dev unit. Also aftermarket toner can cause some weird issues like that.

            Comment

            • blackcat4866
              Master Of The Obvious

              Site Contributor
              10,000+ Posts
              • Jul 2007
              • 22997
              #4
              Try these test patterns:

              Personally, I think you'll find the cyan developer de-toned.
              Attached Files
              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

                • Reed
                  Senior Tech

                  Site Contributor
                  250+ Posts
                  • Feb 2011
                  • 259
                  #5
                  The drums fixed that issue for me.

                    Comment

                    • Carlos Rego
                      Technician
                      • Mar 2024
                      • 40
                      #6
                      Originally posted by Reed
                      The drums fixed that issue for me.
                      All four drums are new

                        Comment

                        • Carlos Rego
                          Technician
                          • Mar 2024
                          • 40
                          #7
                          Originally posted by blackcat4866
                          Try these test patterns:

                          Personally, I think you'll find the cyan developer de-toned.
                          Mean time made some test prints and results are on file,also reprinted a work I had on a thicker paper and again,the spots appear
                          Attached Files

                            Comment

                            • blackcat4866
                              Master Of The Obvious

                              Site Contributor
                              10,000+ Posts
                              • Jul 2007
                              • 22997
                              #8
                              Are you setting the correct media type? I think not.
                              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

                                • Carlos Rego
                                  Technician
                                  • Mar 2024
                                  • 40
                                  #9
                                  Originally posted by blackcat4866
                                  Are you setting the correct media type? I think not.
                                  Media settings are correct

                                    Comment

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