Partial Image is not clear on Taskalfa221

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  • syam201
    Technician
    • Jul 2015
    • 10

    #1

    [CQ] Partial Image is not clear on Taskalfa221

    Dear Friends
    I had a problem with taskalfa 221. When we print or copy, more than half of the image not clear.( if we r printing count report, only the top line is clear.) when I strongly insert the drum unit almost half of the image is clear.
    I tried changing drum unit, developing unit, swaped laser unit,engine pcb, hvt board but the result same. Also I cleaned the all biasing leads which are rusty, but no use. Please help me to solve the issue.
  • blackcat4866
    Master Of The Obvious

    Site Contributor
    10,000+ Posts
    • Jul 2007
    • 23008

    #2
    Re: Partial Image is not clear on Taskalfa221

    Take a look at the primary charge contact on the rear frame. If it arcs you can get light to blank images, black rain, or blurry looking images intermittently. =^..^=
    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

    • syam201
      Technician
      • Jul 2015
      • 10

      #3
      Re: Partial Image is not clear on Taskalfa221

      Originally posted by blackcat4866
      Take a look at the primary charge contact on the rear frame. If it arcs you can get light to blank images, black rain, or blurry looking images intermittently. =^..^=
      Thanks black cat for the fast reply. But I couldn't see any arc there at the rear.any other soln.?

      Comment

      • blackcat4866
        Master Of The Obvious

        Site Contributor
        10,000+ Posts
        • Jul 2007
        • 23008

        #4
        Re: Partial Image is not clear on Taskalfa221

        Can we see some image samples? =^..^=
        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

        • copydocinc
          Trusted Tech

          Site Contributor
          250+ Posts
          • Mar 2015
          • 263

          #5
          Re: Partial Image is not clear on Taskalfa221

          You might check the transfer roller position or the whole door assy that holds the transfer roller.
          You can also stop the print job in the middle of the page to see if the image is good on the drum, maybe not transferring evenly.

          Comment

          • syam201
            Technician
            • Jul 2015
            • 10

            #6
            Re: Partial Image is not clear on Taskalfa221

            Originally posted by blackcat4866
            Can we see some image samples? =^..^=
            Please find the attached images
            Attached Files

            Comment

            • syam201
              Technician
              • Jul 2015
              • 10

              #7
              Re: Partial Image is not clear on Taskalfa221

              Originally posted by copydocinc
              You might check the transfer roller position or the whole door assy that holds the transfer roller.
              You can also stop the print job in the middle of the page to see if the image is good on the drum, maybe not transferring evenly.
              Sufficient image is not formed on the drum. Don't know why?..I checked everywhere is there any chance of bias leakage. Didn't find anything. You may please refer the attachment.

              Comment

              • darry1322
                Senior Tech

                Site Contributor
                500+ Posts
                • Oct 2010
                • 817

                #8
                Re: Partial Image is not clear on Taskalfa221

                I'm not familiar with this model. Does it use a charge corona unit? If so, run with the front door open and press on the end of the charge corona unit.

                I had a 300i model making similar copies once and it turned out to be the contact on the end of the charge unit. Pressing on the unit made for a better contact.
                After finding this out we adjusted the contact for better continuity.

                Comment

                • blackcat4866
                  Master Of The Obvious

                  Site Contributor
                  10,000+ Posts
                  • Jul 2007
                  • 23008

                  #9
                  Re: Partial Image is not clear on Taskalfa221

                  I suspect that the developing unit is not camming up close, for both of the front and rear developing spacers to touch the drum. If the spacing is too great at the front or rear the toner cannot make the jump to the drum.

                  I think what I would do is to:
                  1) make sure that you have good toner coverage on the mag roller, and that the spacers are in good shape.
                  2) insert both the drum unit and developing unit, and cam the developing unit in. Press the developing unit towards the drum to see if there is any gap. If there is a gap with the developing unit cammed up, you'll have to figure out what got bent or broken.

                  =^..^=
                  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

                  • syam201
                    Technician
                    • Jul 2015
                    • 10

                    #10
                    Re: Partial Image is not clear on Taskalfa221

                    Originally posted by darry1322
                    I'm not familiar with this model. Does it use a charge corona unit? If so, run with the front door open and press on the end of the charge corona unit.

                    I had a 300i model making similar copies once and it turned out to be the contact on the end of the charge unit. Pressing on the unit made for a better contact.
                    After finding this out we adjusted the contact for better continuity.

                    Thanks dear. I already checked that. Any way i can see the charge roller correctly engaged to the biasing lead.( because the i opened the inner delivery paper tray. so that we can see the contacts is touching well or not. I replaced the drum unit also .developing unit also. And these drum and developing units are working fine with other machines.

                    Comment

                    • Hose1cook
                      Defective Technician

                      50+ Posts
                      • Jun 2008
                      • 80

                      #11
                      Re: Partial Image is not clear on Taskalfa221

                      Originally posted by syam201
                      Dear Friends
                      I had a problem with taskalfa 221. Also I cleaned the all biasing leads which are rusty, but no use. Please help me to solve the issue.
                      What kind of environment is this machine located in to have rusty contacts? Also what is the direction of paper travel?

                      Comment

                      • syam201
                        Technician
                        • Jul 2015
                        • 10

                        #12
                        Re: Partial Image is not clear on Taskalfa221

                        Originally posted by Hose1cook
                        What kind of environment is this machine located in to have rusty contacts? Also what is the direction of paper travel?
                        Hi dear
                        the machine located at construction site. Lot of dust was there inside the machine.

                        Comment

                        • Hose1cook
                          Defective Technician

                          50+ Posts
                          • Jun 2008
                          • 80

                          #13
                          Re: Partial Image is not clear on Taskalfa221

                          What is the direction of paper feed on your samples? Could be a dirty laser, you might want to pull it and clean it.

                          Comment

                          • syam201
                            Technician
                            • Jul 2015
                            • 10

                            #14
                            Re: Partial Image is not clear on Taskalfa221

                            Originally posted by Hose1cook
                            What is the direction of paper feed on your samples? Could be a dirty laser, you might want to pull it and clean it.
                            Hi dear I changed the laser. I put this laser into another working machine and working fine.

                            Comment

                            • copydocinc
                              Trusted Tech

                              Site Contributor
                              250+ Posts
                              • Mar 2015
                              • 263

                              #15
                              Re: Partial Image is not clear on Taskalfa221

                              The tray that the developer unit slides into may not be moving all the way up to the drum on the side that is blank.
                              Maybe a screw or something blocking its smooth travel towards the drum as you push in the developer unit release lever.
                              push in and out the developer release lever to observe its motion with the developer unit removed.

                              Comment

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