AR-168 Document feeder jam

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  • SwisSeV
    Trusted Tech

    250+ Posts
    • Jan 2016
    • 307

    #1

    [Jamming] AR-168 Document feeder jam

    The doc. feeder jams consistently between 6 and 8 pages. If I open the top and close it (to reset the jam) it's fine again for another 6-8 pages. Then it jams again. It jams because the solenoid (the one that drops the pickup roller assy) doesn't fire. If I take the cover off and manually press the solenoid right before it jams everything works fine.
    I have tried quite a bit to fix this machine and I'm wondering what I should try next. (short of throwing it into the ocean in rage)

    I already switched out EVERYTHING in the Doc. feeder, including the cables.
    I just finished replacing the MCU PWB (the pwb that the cables from the doc feeder connect)

    Just wanted some input before I continue,
    Thanks!
  • dwarf
    Trusted Tech

    100+ Posts
    • Oct 2012
    • 168

    #2
    Re: AR-168 Document feeder jam

    you have a switch hanging up...wrap the springs tighter...or you may have a worn actuator...

    Comment

    • SwisSeV
      Trusted Tech

      250+ Posts
      • Jan 2016
      • 307

      #3
      Re: AR-168 Document feeder jam

      What switch are you referring to? The actuator was replaced; the whole ADF unit was replaced at this point, and the problem persists. Whatever the problem is, it's not coming from the ADF unit itself.

      Comment

      • dwarf
        Trusted Tech

        100+ Posts
        • Oct 2012
        • 168

        #4
        Re: AR-168 Document feeder jam

        this sounded like a timing problem...as each sheet is fed,the timing is a few pulses off and after several sheets the error is enough to trigger a jam code...if you have replaced all the components but still have the problem, the actuator may not be returning to position quickly enough...could be that the rockers that the actuator sit in are dirty and it doesn't float smoothly...or the spring is weak...what does Sharp have to say about this?...what is the jam code...does it happen if you just run single sheets?...

        Comment

        • dwarf
          Trusted Tech

          100+ Posts
          • Oct 2012
          • 168

          #5
          Re: AR-168 Document feeder jam

          check this out... MFP-TB-026

          Comment

          • walterman
            Trusted Tech

            Site Contributor
            100+ Posts
            • May 2013
            • 196

            #6
            Re: AR-168 Document feeder jam

            Have you removed the spring clutches and cleaned out the gummed up factory grease and lightly relubed? These ADFs were notorious for jamming because of the grease hardening up in the spring clutches.

            Comment

            • blackcat4866
              Master Of The Obvious

              Site Contributor
              10,000+ Posts
              • Jul 2007
              • 22997

              #7
              Re: AR-168 Document feeder jam

              The small Sharp DF's are also well known for late image registration and jamming, because the rubber rollers are slipping. Not just the two at pickup. All of them, especially the registration roller. Clean them all with an orange oil based cleaner.

              They're not easy to get to, but worth the effort. =^..^=
              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

              • SwisSeV
                Trusted Tech

                250+ Posts
                • Jan 2016
                • 307

                #8
                Re: AR-168 Document feeder jam

                okay, I'm back working on this old bastard again.

                Thanks for all the suggestions!
                Remember guys, I replaced the whole DF with a new one that works on another machine.
                I did double check the sensors, and they are working.
                The actuator is working great, and it's very clean.
                This model doesn't give jam codes; am I wrong? sim 22-3 doesn't even exist.
                I cleaned the reg. rollers, although they are new and only have test page dust on them

                What bugs me is, all I have to do is push the solenoid every 8 pages or so and it works FINE! It just decides not to fire the solenoid and it jams.

                Comment

                • blackcat4866
                  Master Of The Obvious

                  Site Contributor
                  10,000+ Posts
                  • Jul 2007
                  • 22997

                  #9
                  Re: AR-168 Document feeder jam

                  Originally posted by SwisSeV
                  okay, I'm back working on this old bastard again.

                  Thanks for all the suggestions!
                  Remember guys, I replaced the whole DF with a new one that works on another machine.
                  I did double check the sensors, and they are working.
                  The actuator is working great, and it's very clean.
                  This model doesn't give jam codes; am I wrong? sim 22-3 doesn't even exist.
                  I cleaned the reg. rollers, although they are new and only have test page dust on them

                  What bugs me is, all I have to do is push the solenoid every 8 pages or so and it works FINE! It just decides not to fire the solenoid and it jams.
                  Are you getting the appropriate voltage and ground for the solenoid to operate? Find a way to attach a multimeter and watch for 24vdc (presumably) across the solenoid. =^..^=
                  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

                  • SwisSeV
                    Trusted Tech

                    250+ Posts
                    • Jan 2016
                    • 307

                    #10
                    Re: AR-168 Document feeder jam

                    24.5 volts across the solenoid. It has no problem running consistently in simulation.
                    I'm not sure what's next, since the mcu pwb has already been replaced.

                    Comment

                    • dwarf
                      Trusted Tech

                      100+ Posts
                      • Oct 2012
                      • 168

                      #11
                      Re: AR-168 Document feeder jam

                      is there voltage across the solenoid when it fails to fire?

                      Comment

                      • subaro
                        Service Manager

                        1,000+ Posts
                        • Oct 2010
                        • 1274

                        #12
                        Re: AR-168 Document feeder jam

                        10 Original feed solenoid SPUS Original pick up solenoid
                        11 SPF paper feed solenoid SPFS Original feed solenoid (RSPF only)
                        12 SPF gate solenoid SGS Controls the document reverse gate. (RSPF only)

                        There are three solenoids on that adf. look at what they are driving or operating and put small amount of grease on the pivot points. pivots points of the gate and actuator ect.

                        Also a question. where does the lead edge of the paper is at when it jams. Is it at the exact place or different points?.
                        THE ONLY THING FOR EVIL TO TRIUMPH IS FOR GOOD MEN TO DO NOTHING..........edmund burke

                        Comment

                        • subaro
                          Service Manager

                          1,000+ Posts
                          • Oct 2010
                          • 1274

                          #13
                          Re: AR-168 Document feeder jam

                          Originally posted by dwarf
                          this sounded like a timing problem...as each sheet is fed,the timing is a few pulses off and after several sheets the error is enough to trigger a jam code...if you have replaced all the components but still have the problem, the actuator may not be returning to position quickly enough...could be that the rockers that the actuator sit in are dirty and it doesn't float smoothly...or the spring is weak...what does Sharp have to say about this?...what is the jam code...does it happen if you just run single sheets?...

                          Have to agree with the above. He mentioned that when he pushes the solenoid it works fine, hence the actuator is being hindered in some way or the spring is weak as mentioned above.
                          THE ONLY THING FOR EVIL TO TRIUMPH IS FOR GOOD MEN TO DO NOTHING..........edmund burke

                          Comment

                          • SwisSeV
                            Trusted Tech

                            250+ Posts
                            • Jan 2016
                            • 307

                            #14
                            Re: AR-168 Document feeder jam

                            Again, it behaves the same way with a new DF or the original DF. The new DF works on another machine, so the solutions you are suggesting couldn't possibly be the problem.
                            Today the solenoid doesn't fire at all. The paper never gets picked up. Now the solenoid doesn't fire in sim either. The rspf motor is still working and is getting normal voltage.
                            I'm going to replace the power pwb. Looks like a pain to get to...

                            Comment

                            • SwisSeV
                              Trusted Tech

                              250+ Posts
                              • Jan 2016
                              • 307

                              #15
                              Re: AR-168 Document feeder jam

                              Replacing both the power and high voltage pwb didn't help.

                              Comment

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