KV-S1025C-S - Panasonic Other Service Manuals Service Manual (repair manual). Page 23

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    (1) Turn off the scanner by turning the Power Switch off and
         unplugging the AC Adaptor from the scanner. (See 7.2.1.)

    (2) Remove the Feed Tray. (See 7.2.1.)

    (3) Push the Door Open Button to open the ADF Door. 
         (See 7.2.1.)

    (4) Open the Double-feed Prevention Roller Cover in the
         direction of the arrow, holding the Double-feed Prevention
         Roller not to drop out.

    (5) Remove the Double-feed Prevention Roller.

    (6) Take out a new Double-feed Prevention Roller from the
         Roller Exchange Kit (KV-SS035).
 
    (7) Install the new Double-feed Prevention Roller into the
         metal holder with the longer groove facing to the right-side
         (seen form the back), and close the Double-feed
         Prevention Roller Cover.
           Note:

        Make sure to close the Double-feed Prevention
        Roller Cover tightly, by pressing both ends of
        the cover.

    (8) Close the ADF Door slowly until it clicks into place.
         (See 7.2.3.)

    (9) After installing the Feed Tray, turn on the scanner by
         plugging the AC Adaptor to the scanner and turning the
         Power Switch on. (See 4.2 and 4.3.)

   After replacing the Paper Feed Roller and Double-feed
   Prevention Roller, make sure to execute “Clear Counter”
   for replacing Rollers with Service Utility. (See 9.3.4.)