mp 7500 original detection

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  • salmandol
    Trusted Tech

    100+ Posts
    • Mar 2009
    • 107

    mp 7500 original detection

    hi, i have a mp7500 that detects wrong paper sizes when copying from the adf and exposure glass. at first i replaced adf circuit board before i realized that i was also getting problem with exp glass. i checked all original detection sensor on both adf and under glass - working fine. any help will be greatly appreciated
  • alizen
    Technician
    • Dec 2008
    • 14

    #2
    Re: mp 7500 original detection

    check the adf exposure lamp black plate there is a ir sensor windows open the plate and service the paper size selector switchs or send me your emailid iwill seend you pics
    lift adf
    2 open black plate starting side of adf

    3switches for diffrent sizes services the is ablack mark of tape on a plate will white trun white in to black this spot




    Originally posted by salmandol
    hi, i have a mp7500 that detects wrong paper sizes when copying from the adf and exposure glass. at first i replaced adf circuit board before i realized that i was also getting problem with exp glass. i checked all original detection sensor on both adf and under glass - working fine. any help will be greatly appreciated

    Comment

    • alizen
      Technician
      • Dec 2008
      • 14

      #3
      Re: mp 7500 original detection

      check the&nbsp; adf exposure lamp black plate&nbsp; there is a ir sensor windows open the plate and service&nbsp; the paper size&nbsp;selector switchs or send me your emailid iwill seend you pics<BR>lift adf<BR>2 open black plate starting side of adf<BR><BR>3switches for diffrent sizes services the is ablack mark of tape on a plate&nbsp; will white trun white in to black this spot

      Comment

      • rickg
        Supervisor
        • Feb 2010
        • 22

        #4
        Re: mp 7500 original detection

        What size paper is it saying you need to have. I had a machine ask for 7 1/2 X10 in paper when feeding letter size paper. found one of the setting set to the wrong setting.

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        • Cipher
          It's not easy being green

          1,000+ Posts
          • May 2006
          • 1309

          #5
          Re: mp 7500 original detection

          It's worth checking out the default settings for detection.

          adf_settings.pdf
          • Knowledge not shared, is eventually knowledge that becomes lost... like tears in the rain.

          Fully qualified technician for Ricoh - Canon - Sharp - HP - Brother

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          • salmandol
            Trusted Tech

            100+ Posts
            • Mar 2009
            • 107

            #6
            Re: mp 7500 original detection

            Originally posted by rickg
            What size paper is it saying you need to have. I had a machine ask for 7 1/2 X10 in paper when feeding letter size paper. found one of the setting set to the wrong setting.
            letter on exposure glass asks for a4, letter from adf asks for 16k if i remember correctly... legal asks for 8 1/2x10...all sizes asks for wrong sizes

            Comment

            • salmandol
              Trusted Tech

              100+ Posts
              • Mar 2009
              • 107

              #7
              Re: mp 7500 original detection

              Originally posted by Cipher
              It's worth checking out the default settings for detection.

              [ATTACH]12193[/ATTACH]
              thanks i'll check it out

              Comment

              • rickg
                Supervisor
                • Feb 2010
                • 22

                #8
                Re: mp 7500 original detection

                check SP5126 and make sure it is set to the correct setting

                Comment

                • mikadonovan
                  Senior Tech

                  Site Contributor
                  2,500+ Posts
                  • May 2008
                  • 2937

                  #9
                  Re: mp 7500 original detection

                  Originally posted by rickg
                  I had a machine ask for 7 1/2 X10 in paper when feeding letter size paper.
                  I had this same exact thing happen on a B140. Remove the ADF rear cover and look at the gears that drive the primary feed roller shafts. There is a couple of one way bearings that get dirty/worn and screw up the feed timing. Obviously this would only happen when using the document feeder, though.
                  NEVER ASSUME ANYTHING

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