Look around the MoHPC for my article on "Pioneer Internals" (I don't konw how to hyperlink from here). It tells how I took a few apart. It's not impossible. If you decide to take the LCD out, that's the most touchy part of the operation.
Sorry, but I just noticed this response. The LCD has dust and grit underneath and the display is getting difficult to read. I'd just like to clean the display.