Where do psp and ps3 consoles get assembled and how?

Tough question, however after personal research and communication with Sony this is what I've come up with.

Simple and quick, the "Fat" or original models have been assembled in China, but there are sub-assemblies that were prefabbed in Japan on launch date systems (CECHAXX CECHBXX). Many people claim that "the one assembled in Japan is better", well hate to break it to them they never have been assembled in Japan and only launch date systems even had Japanese prefabbed sub-assemblies (fan heatsink and RSX/Cell Motherboards). Even these systems were finally assembled in China.

These are the locations:

Sony EMCS - Japan This is where the PS3 was designed and in launch models where the fan, heatsink and motherboard was assembled

MAINTEK Computer - China This is where about oh say 100% of original 'Fat" PS3 systems are assembled

Foxconn - Taiwan - This is where the PS3 slims are assembled

Notice I use the Word assembled, the parts are from all over the planet, even if you look at a launch PS3 the label on the bottom clearly says "Made in China" though the Motherboard/Fan/Heatsink may have been prefabbed in Japan