AR-275 lighter at top of page (rear of machine)--still there after changing----

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  • axyun
    Service Manager

    Site Contributor
    1,000+ Posts
    • Aug 2007
    • 1323
    #1

    AR-275 lighter at top of page (rear of machine)--still there after changing----

    Changed drum, developer main charger and one of those usually takes care of problem. Swapped out entire process unit from good copy quality machine. Haven't swapped out dv unit which I will do next. Is this possibly an LSU problem? I haven't checked doctor blade gap yet though I doubt that is problem as haven't had to do that in years. Any help is always and forever appreciated. Frank/ActionPhotocopy
    Tags: 275, appreciated, blade, copy, copy quality, developer, dirty, doc, drum, dv unit, gap, good, lighter, lsu, main, page, process, quality, rear, tire, top, unit
    • oldrn
      Trusted Tech

      100+ Posts
      • Apr 2008
      • 166
      #2
      Same problem when doing self test print in sim 64-1? If so, per LSU question, is machine in a dirty environment? Sometimes polygon motor surface, lenses, etc in LSU get dirty or clouded causing similar CQ problems.

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        • gwaddle
          Senior Tech

          500+ Posts
          • May 2009
          • 782
          #3
          Sounds to me that just cleaning the laser glass above the drum will probably help. If the developer is old, the toner could be clouding up to the glass. Also check the developer seal. It might be letting toner get past it to the glass. If it is the glass cleaning it should show a vast improvment right away.
          I know I should be ashamed of myself. Strangely though, I am not.

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            • axyun
              Service Manager

              Site Contributor
              1,000+ Posts
              • Aug 2007
              • 1323
              #4
              Thanks for your quick response guys. I cleaned the slit glass above drum but didn't do a 64-01 printer function sim.The machine is in a pretty clean environment so not apt to get any extra dust like a garage/warehouse or woodworking place. Will try getting back this week as customer is not too disturbed about problem. It bothers me more than customer. I will post results when eventually it is resolved or leave you guys the call in my will. Frank
              Last edited by axyun; 05-25-2010, 11:46 PM. Reason: left out letter s for making plural(guy(s))

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                • oldrn
                  Trusted Tech

                  100+ Posts
                  • Apr 2008
                  • 166
                  #5
                  Originally posted by axyun
                  a I will post results when eventually it is resolved or leave you guys the call in my will. Frank
                  Planning on going soon? If so, hope you know where you are headed...

                  We had a smaller Sharp digital machine in a doctor's office. It was brought to us multiple times for light copy on the edge. Some kind of white powder in their environment kept getting into the LSU and onto the polygon motor surfaces. The powder was on the edges of the surface farthest away from the motor. Traces of powder were seen in the filter on the machine but nothing obvious - the machine appeared to be clean and in a clean environment.

                    Comment

                    • axyun
                      Service Manager

                      Site Contributor
                      1,000+ Posts
                      • Aug 2007
                      • 1323
                      #6
                      Thanks oldrn. I have had this customer for a while and haven't had this problem before so I don't expect this to be the type of problem you mention though I am glad you mention it for future reference. Frank

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