In case you wish to void your warranty or are just plain bored, here are some internal pics I have from my recent px560 repair due to mashing one of the control knobs and rendering it rather useless. Don't do this unless you 1) ABSOLUTELY HAVE NO CHOICE   2) HAVE NO WARRANTY  3) are very experienced with electronics repair  AND 4) have alot of free time to do nothing else. YOU HAVE BEEN WARNED.........