A scanner having a serviceable circuit board assembly with a stair-stepping configuration. The scanner has a card cage for mounting circuit boards in the rear of the scanner. The card cage has an access opening. A first circuit board and a second circuit board are mounted inside the card cage. The first...http://www.google.fr/patents/US6324070?utm_source=gb-gplus-shareBrevet US6324070 - Service access for a scanner
