Second side of original is lighter and blurry

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  • V-P
    Senior Tech

    Site Contributor
    500+ Posts
    • Apr 2011
    • 679
    #1

    [CQ] Second side of original is lighter and blurry

    On a iR8295 machine when I scan from ADF (2-sided original) - the second side of the page comes out blurry and lighter.
    It is not printer issue - it occurs on scanner.

    It does not happen from glass - only from ADF.

    I have cleaned everything.

    What am I missing ?

    Thnx,
    Tags: None
    • blackcat4866
      Master Of The Obvious

      Site Contributor
      10,000+ Posts
      • Jul 2007
      • 22929
      #2
      Re: Second side of original is lighter and blurry

      On most single scan document feeders the first side is scanned by the CCD through the slit glass, and the second side is simultaneously scanned by a CIS in the DF. The CCD can produce a much better image in most cases than the CIS, so often a quality difference is noticeable. I would not be a bit surprised if Canon had some special test patterns to calibrate the image quality for both the CCD and the CIS. You might take a look in your service manual. =^..^=
      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 =^..^=

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        • MunsterTech
          Trusted Tech

          Site Contributor
          250+ Posts
          • Sep 2014
          • 377
          #3
          Re: Second side of original is lighter and blurry

          not sure on that model but cant you go into CCD adjust and do DF-WVLgth 1 and 2, 1 works from the glass and 2 works from the DADF, i find that it works great on some IR machines to improve quality

            Comment

            • dan7777
              Senior Tech

              500+ Posts
              • Dec 2012
              • 680
              #4
              Re: Second side of original is lighter and blurry

              Originally posted by V-P
              On a iR8295 machine when I scan from ADF (2-sided original) - the second side of the page comes out blurry and lighter.
              It is not printer issue - it occurs on scanner.

              It does not happen from glass - only from ADF.

              I have cleaned everything.

              What am I missing ?

              Thnx,
              If it is a dirty/dusty environment you need to take the second side scanner out of the adf and clean. Not very hard to do. Take it out from the top. Clean the mirrors or you may need to replace it if it is bad. All mine I cleaned. It throws a code when it gets real dirty.

                Comment

                • Canuck
                  Tech Specialist

                  1,000+ Posts
                  • Nov 2007
                  • 1713
                  #5
                  Re: Second side of original is lighter and blurry

                  Clean the read glasses then do your CCD ADJ, white levels 1,2,3 and 4..

                    Comment

                    • V-P
                      Senior Tech

                      Site Contributor
                      500+ Posts
                      • Apr 2011
                      • 679
                      #6
                      Re: Second side of original is lighter and blurry

                      Ok - apparently the inner mirror (side mirror) inside the cis was very dusty.

                      I did clean all the glasses (also my glasses )

                      It is looking better now.

                      Thnx fellas !

                        Comment

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