Aficio 700 developer causing dirty prints

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  • Herostrat
    Trusted Tech

    100+ Posts
    • Oct 2012
    • 220
    #1

    Aficio 700 developer causing dirty prints

    This is probably the oldest and allso the best machine I'm working on,until recently at least.
    Machine is working with only OEM parts and toner...never the sh*t,I did ful parts change few months ago and since then it did 50k papers.
    Had a call for service and saw this wierd fat pale gray iregular line on papers about on uper quarter of paper,it looks like dirty corona but it's damn fat,about 3 cm and drum has those litle black strecks in that area.
    So I did preventive maintenance on it,ran SP 2962,and it looked to me like it puts a bit of background on paper,printed about 50 papers and the line apeared again,then I raised SP2001 on 1000v and it worked like a charm.
    Now 2 weeks later I have to go there again and deal with the same problem,my bet is on developing assembly,tech who worked on it before I did told me that machine is working for some time but it can't initiate developer after change (I culdn't do it eather,and at that moment I didn't know what to do)
    He ashured me that it's all fine?!?!...Old tech who don't give a damn to be honest.
    Now service manul tells me:
    If I can't initiate developer I shuld refer to:
    SC390-2: TD sensor error 2
    -Definition- [B]
    Gears,springs,clutches,sliders,connectors and electronics...who on earth can tell what's wrong with it?
    Tags: aficio, aficio 700, area, black, error, parts, print, tech, time, toner
    • Iowatech
      Not a service manager

      2,500+ Posts
      • Dec 2009
      • 3930
      #2
      Re: Aficio 700 developer causing dirty prints

      Sounds like you're on the right track. And it probably wouldn't hurt to replace the developer assembly anyway to prevent developer from leaking into the feed clutches due to worn seals on a machine that old.
      Some other things you might check if you have time:
      Make sure the charge grid is in good shape,
      Also, as the drum cleaning blade oscillates, check it for an accumulation of paper dust or damage to the cleaning edge, or for the waste toner system to be plugged,
      And maybe make sure the hot roller and pressure roller in the fusing unit are OK.
      The additional suggestions are probably pointless as you did the PM. As such, sorry about that.
      Also, if you have time, a picture would help a lot.

        Comment

        • Herostrat
          Trusted Tech

          100+ Posts
          • Oct 2012
          • 220
          #3
          Re: Aficio 700 developer causing dirty prints

          All parts are in excelent shape...they all did 50k prints,corona wire and grid are to wish for.
          I change developer seals and semerings on every developer change so pick up assembly is ok.
          It's the cleanest freaking machine I ewer seen...first time I went there to do PM and when I opened front door I asked..."what...to clean what,this is perfect"
          I went there today to try and fix it,but with no luck Vsp and Vsg sticks to 5v no matter what,tryed changing SP 2001 and 2201,still nothing...10 prints and it's all downhill.
          What I noticed that even mag rollers are in damn fine shape they are wery wery dirty...they are freaghin black!
          That makes me think I shuld change developer...no matter how much it did and no matter who made it (Ricoh building...I'll torch u one day!)
          I'll change developer tomorow and come back with more info,sadly I can't post pics atm cause we sold displayed machine on office that was serving as scanner so I have to mess around with new scanner again...another 15 min of life wasted.
          Gears,springs,clutches,sliders,connectors and electronics...who on earth can tell what's wrong with it?

            Comment

            • Iowatech
              Not a service manager

              2,500+ Posts
              • Dec 2009
              • 3930
              #4
              Re: Aficio 700 developer causing dirty prints

              If you can't clean the toner off the mag roller with a dry, soft cloth, you might want to replace the roller, or use a slightly more aggressive cleaning procedure. A mag roller coated with toner will cause problems with process control.
              On the other hand, could there be excess humidity where the machine is located at? Excess humidity in the paper or in the machine can sometimes cause problems like this.

                Comment

                • Herostrat
                  Trusted Tech

                  100+ Posts
                  • Oct 2012
                  • 220
                  #5
                  Re: Aficio 700 developer causing dirty prints

                  Oh I hardly ever vacume filters in the back or inside...it culd be that,wont hurt trying.
                  Gears,springs,clutches,sliders,connectors and electronics...who on earth can tell what's wrong with it?

                    Comment

                    • Herostrat
                      Trusted Tech

                      100+ Posts
                      • Oct 2012
                      • 220
                      #6
                      Re: Aficio 700 developer causing dirty prints

                      Changed developer today,it's all good now,it even managed to initiate TD sensor.
                      Now all that remains is to figure out how culd old developer fail after 50k papers.
                      Gears,springs,clutches,sliders,connectors and electronics...who on earth can tell what's wrong with it?

                        Comment

                        • Iowatech
                          Not a service manager

                          2,500+ Posts
                          • Dec 2009
                          • 3930
                          #7
                          Re: Aficio 700 developer causing dirty prints

                          You might check the toner recycling unit (the clear piece on the top of the developer unit). And any of the rest of the parts that add toner to the developer, including the ID sensor.
                          Now that I think about it, I may have caused a very similar problem myself. I had a machine in my area that had very low usage (too low for the machine I learned later), so the toner would always run out and the prints would be really light. I'd go there and run a "forced toner add" and the machine would print fine. After that happened more than once, I did "forced toner add" twice, causing the machine to print similar to the way yours did. I had to replace the developer, and then reduce the value of "toner feed time" in service mode to make the toner feed better for the low usage (although it never was quite right). Sorry I forgot about that. Still, it is the reason I suggested checking the parts in the toner feed system, the excess toner had to get in there somehow.

                            Comment

                            • Herostrat
                              Trusted Tech

                              100+ Posts
                              • Oct 2012
                              • 220
                              #8
                              Re: Aficio 700 developer causing dirty prints

                              I checked it on PM,it's poaring toner without problem,I allways clen the plate with pinholes on it,disasemble and vacume it so that posible hadened toner on holes gets removed.
                              Then I turn the drive gear of that mylar holding assembly over developing unit,they shuld poar toner equaly,even a slightest touch on drive gear is enough to poar toner...if not then there's a problem.
                              I'm not shure if other techs do this or if it's in service manual,I figured it culd be done on every PM so I rarely have problems with adding toner in to developer.
                              Thanks for the info Iova.
                              Gears,springs,clutches,sliders,connectors and electronics...who on earth can tell what's wrong with it?

                                Comment

                                • Herostrat
                                  Trusted Tech

                                  100+ Posts
                                  • Oct 2012
                                  • 220
                                  #9
                                  Re: Aficio 700 developer causing dirty prints

                                  Small update,had a call the other say from them saying :"It's bad again"
                                  It was clear that developer changing did nothing (new developer did about 3k prints) so I figured it's defective Corona Power Pack.
                                  I changed it and at first I had some troubles lowering Vsp and Vsg,did few proces controls,and id sensor initial setting,forced toner supply...the whole shabang untill it worked.
                                  Did about 150 prints on spot without any problems.
                                  I'll do my best to post pic of faulty prints it had.
                                  Gears,springs,clutches,sliders,connectors and electronics...who on earth can tell what's wrong with it?

                                    Comment

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