Dell 5230dn Mono Laser Printer Service Manual - Page 291
sheet/550-sheet tray assembly
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250-sheet/550-sheet tray assembly Lockable back restraint Rear media tray guide Media end guide Auto size finger actuator Media size sensing The media size set for the media tray assembly is set by positioning the right media guide, unlocking the slider lock, and sliding the rear paper guide. The rear paper guide triggers the movement of the auto size sensing finger, which then sets the switches of the controller card board. The combination of ON/OFF position of the three switches provides information of the media sizes to the engine. Media size Unknown A4 Legal B5 A5 Executive Letter Custom SW 1 OFF OFF OFF OFF ON ON ON ON SW 2 OFF OFF ON ON OFF OFF ON ON SW 3 OFF ON OFF ON OFF ON OFF ON Note: Media size sensing through ON/OFF switch combination Diagnostic aids 3-85