taskalfa 6550ci

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  • TECHKYO
    Technician
    • Aug 2016
    • 15
    #1

    taskalfa 6550ci

    I am having problem with taskalfa 6550 ci yellow color not printing?
    what I have done :
    1- Replaced dev. unit for yellow

    2- Replaced drum for yellow

    3- Replaced H.V PCB

    4- Replaced Transfer H.V

    5- firmware updated to the latest
    6- Replaced Engine PCB
    any suggestion please ...
    thanks
    Tags: None
    • subaro
      Service Manager

      1,000+ Posts
      • Oct 2010
      • 1274
      #2
      Re: taskalfa 6550ci

      In service mode run u089 and print out colour belt

      If the laser is defective, you would get blank print and copies. Not sure if the laser can be swapped with cyan, but that is the step i would take to troubleshoot the problem or just replace the laser with a new one. check if the machine is under warranty and order the part as such.
      THE ONLY THING FOR EVIL TO TRIUMPH IS FOR GOOD MEN TO DO NOTHING..........edmund burke

        Comment

        • CWP
          Trusted Tech

          100+ Posts
          • Jun 2013
          • 168
          #3
          Re: taskalfa 6550ci

          Best way I have found to troubleshoot laser is to cover a portion of the charge roller with a piece of tape and run a print. In this case, put a 1/4 to 1/2 inch wide strip of tape around the yellow charge roller (make sure it won't come off), and if the laser has failed, you will get a void of yellow except where the tape is. If there is no yellow at all, then you should look elsewhere.
          The best tape I have found for this is that stuff the painters use for trim (probably no prof. painters, but amateur painters like me).

            Comment

            • TECHKYO
              Technician
              • Aug 2016
              • 15
              #4
              Re: taskalfa 6550ci

              laser can be swap to cyan or magenta or black I did that but still machine no yellow print, I am going to re-check the machine by tomorrow then I will update you guys.
              thanks all for your commitment

                Comment

                • habik
                  Service Manager

                  Site Contributor
                  1,000+ Posts
                  • Apr 2010
                  • 2013
                  #5
                  Re: taskalfa 6550ci

                  Any sign of HV 1st transfer connection failure for transfer belt?
                  Have you tried halftone print and pulled the transfer belt and drum out?
                  Bad
                  Cover half of yellow laser window with tape. Print some yellow halftone page A3 size. Check for any hints of yellow.

                  Is developer toned with yellow toner?

                  What about settings?, anything out of wack?!

                  Byting on bits.
                  .OK Google! ... will I need Berrocca this morning?
                  Firmwares HERE

                    Comment

                    • copier_doctor
                      Junior Member
                      • Dec 2014
                      • 5
                      #6
                      Re: taskalfa 6550ci

                      Have you confirmed you are getting developer drive? I have seen the DV drive unit cause this issue..

                        Comment

                        • blackcat4866
                          Master Of The Obvious

                          Site Contributor
                          10,000+ Posts
                          • Jul 2007
                          • 22934
                          #7
                          Re: taskalfa 6550ci

                          Originally posted by copier_doctor
                          Have you confirmed you are getting developer drive? I have seen the DV drive unit cause this issue..
                          If the developer drive was lost, you'd have "Toner Add" messages, and low toner density codes. I think he would have noticed those. =^..^=
                          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

                            • TECHKYO
                              Technician
                              • Aug 2016
                              • 15
                              #8
                              Re: taskalfa 6550ci

                              hello guys
                              here the update
                              replacing Laser FFC wire and machine working smoothly part # 2K946B20
                              even the old one look good
                              thanks all for help

                                Comment

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