UTAX CD1080/KM 8030 blank image

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  • traxdc
    Technician
    • Mar 2011
    • 16
    #1

    UTAX CD1080/KM 8030 blank image

    Hi Guys

    can anyone shed some light on a problem that I have with a Utax CD 1080. after sliding out the drum assy and removing the charge corona to show the customer a chip on the drum surface, i re-inserted the drum assy and now have no image. what i do have is a smudged black band about 15mm along the lead edge followed by black spots, both will dissapear after a few copies. i have checked the connectors/voltages on the controller, i have tried a different drum and corona units, i have replaced the dev unit, potential sensor and the contacts at the rear of the drum unit.

    ANY IDEAS?
    Tags: advised, ages, approx, black, blank, cd1080, controller, copies, customer, dirty, duc, hvt, image, inserted, km 8030, lead edge, light, nas, pulled, pushed, sliding, understanding
    • blackcat4866
      Master Of The Obvious

      Site Contributor
      10,000+ Posts
      • Jul 2007
      • 22927
      #2
      It sounds like transfer loss to me. Have you emergency-stopped the machine to see if there is any latent image? If yes, It could be the transfer HVT under the transfer belt, the spade connector damaged, or the transfer unit itself. When you're looking at the transfer belt assembly be sure to look at the aluminum idler roller at the right (shaft wears down), bearing failure, or extreme rust production at the transfer contact strip. =^..^=
      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

        • traxdc
          Technician
          • Mar 2011
          • 16
          #3
          thanks

          i had already tried stopping the m/c mid print and there is no latent image and i also checked the transfer assy.

          Utax have suggested changing the HV unit, Engine Controller and Transfer HV unit.

            Comment

            • blackcat4866
              Master Of The Obvious

              Site Contributor
              10,000+ Posts
              • Jul 2007
              • 22927
              #4
              Well, if there is no latent image you can forget the transfer HV unit.
              And you can probably rule out developing. You've got the spring tension applied to the developing unit, right? If there was any main charge you would get some image, however faint.
              I'm leaning towards primary charge. I suppose the chip in the drum could cause massive enough drum grounding problems to negate any primary charge. Do you have a scrap drum to install for diagnostic purposes? =^..^=
              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

                • traxdc
                  Technician
                  • Mar 2011
                  • 16
                  #5
                  Thanks again blackcat

                  have tried a different charge unit and drum, still no luck. al i did at the start was pull the drum unit out show the customer the chip on the drum and push the unit back in and then there was no image just speckles on the first few pages.

                  i wish i had called in sick that day!

                    Comment

                    • blackcat4866
                      Master Of The Obvious

                      Site Contributor
                      10,000+ Posts
                      • Jul 2007
                      • 22927
                      #6
                      Originally posted by traxdc
                      Hi Guys ... i have checked the connectors/voltages on the controller, i have tried a different drum and corona units, i have replaced the dev unit, potential sensor and the contacts at the rear of the drum unit ...
                      That was my other ace, the developer bias contact. I just changed one today for very light prints intermittently. Did you by any chance use conductive grease on the contact? I've had very bad results with conductive grease. It must be dry.

                      Sorry I'm not more help. =^..^=
                      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

                        • traxdc
                          Technician
                          • Mar 2011
                          • 16
                          #7
                          thanks once more

                          i didn't use conductive grease when i replaced the contacts. utax have advised me to order the hv boards and engine controller and if they don't work they will take them back at no cost to us.

                          although i have checked just about everything I have that feeling in the back of my mind it is going to be something really silly and embarrasing.

                          i will let you know how i get on blackcat

                            Comment

                            • blackcat4866
                              Master Of The Obvious

                              Site Contributor
                              10,000+ Posts
                              • Jul 2007
                              • 22927
                              #8
                              I know you've already checked this, but since I just came across the same issue this week, I though I'd post pix of the developer bias contact.
                              Bias Contact2.JPG
                              Bias Contact1.JPG

                              =^..^=
                              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

                                • aabarnes1
                                  Senior Tech
                                  • Mar 2009
                                  • 620
                                  #9
                                  Am I right in understanding you slid out the drum unit only, did you remove the charge unit dev unit or cleaning unit at all. It really does sound like something simple .What was the origination fault, and why did you feel the need to pull out the drum?. The only image problems we have in relation to these, we have 45 of them, is dirty optics, dev unit failure at approx 400k or transfer roller bias problem. Did you mess around with the transfer unit at all?
                                  Grant me the serenity to accept the things I cannot change.

                                    Comment

                                    • traxdc
                                      Technician
                                      • Mar 2011
                                      • 16
                                      #10
                                      yeah pulled out the drum unit and removed the charge unit to show the customer a chip on the drum, re inserted the charge unit and slid the drum carriage back in then the problem started.
                                      Attached Files

                                        Comment

                                        • traxdc
                                          Technician
                                          • Mar 2011
                                          • 16
                                          #11
                                          thats nasty, did someone get hugry and gave a nibble?

                                          here is wot i am getting
                                          Attached Files

                                            Comment

                                            • aabarnes1
                                              Senior Tech
                                              • Mar 2009
                                              • 620
                                              #12
                                              Originally posted by traxdc
                                              thats nasty, did someone get hugry and gave a nibble?

                                              here is wot i am getting
                                              What does the mag roller look like?
                                              Grant me the serenity to accept the things I cannot change.

                                                Comment

                                                • traxdc
                                                  Technician
                                                  • Mar 2011
                                                  • 16
                                                  #13
                                                  new dev unit

                                                    Comment

                                                    • dickierock
                                                      Trusted Tech

                                                      Site Contributor
                                                      250+ Posts
                                                      • Jan 2010
                                                      • 252
                                                      #14
                                                      Was the machine still powered up when you pulled out/pushed back in the drum unit?

                                                        Comment

                                                        • Eng_Mohamed
                                                          Technician
                                                          • Apr 2008
                                                          • 21
                                                          #15
                                                          Did you find the problem? What was the fix?

                                                            Comment

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