(cpu)
i drew it up to see if the board can slide up with the pegs in there and have concluded no.. there's around 1/16" of play.. maybe as much as an 1/8 but even then, i don't think it's enough to slide the board vertically out of its socket.
as far as i can gather, those pegs will remain in place while you're servicing the cpu.. they don't come out unless you're unscrewing the secondary plate on the core. they're probably hexed near the bottom which will accept a socket or i suppose the bottom of the thread recess could be a star drive as well..
i don't think you just unscrew all 8 screws, then remove the board while the cpu just stays back balancing on the pegs.. another way to say that is i think the cpu socket will remain attached to the board even after all 8 screws are removed.
this problem with the pegs will happen regardless of the fan/top being in place.. if the whole top wasn't there, i still can't see how you would unplug the board.. the only way would be to unscrew the whole bottom then disconnect backwards (remove the socket from the plug instead of the other way around).. but that would be dumb.
i've only seen the slot for this board in one image (below).. one of apple's exploded views with the shadows boosted.. (the pegs are also visible here)
i don't know.. i can't figure it out from this one picture.. a couple of guesses which would resolve the pin problem would be that the board's socket is hinged allowing you to bring the top down then pull it straight out towards you.. i think this would be sweet because even if we could slide it straight up, we'd still have to maneuver the board afterwards in the same motion as the hinge would provide.. so a hinge would let you do it all in one motion..
but still, a hinged plug seems a little out there (fwiw, the ram plugs are hinged so i guess it's not a completely ridiculous thought)
the other guess was the one that i've thought all along but it just seems highly unlikely.. that being there's a hole in the board.. the board doesn't have to go anywhere in order to get to the cpu.. the first bracket (on the left in the top render) comes off then there's no secondary bracket.. the next piece (2nd from the left) is actually the socket and it, as well as the cpu, comes straight out.. it seems to be the easiest way to do it but the problem is that the shuttle now has a plug involved as it has to connect to the board somehow.. (basically suggesting the same thing as if on a more standard design, you would remove the socket itself from the board instead of only the cpu.)
the problem is, those are just my ideas and my ideas don't matter too much in this type of exercise.. the goal is to read what the designer's ideas are/were.. and they haven't left enough clues.
i can't disprove or prove either of my ideas even though they're pretty far apart on the spectrum.. we need more pictures.
on a side note- that bracket system is not designed to help robots assemble the computer.. it's also not designed to assist the workers in the factory.. it's designed for you.. i won't go too far into it as it's another wall of words but it's shaped and cut this way to allow someone with a screwdriver to tighten it to proper tension on a consistent basis.. you can't really over tighten it (i mean, i'm sure you can strip the screw etc) but there will be some leeway if you happen to under tighten.. basically, the last quarter turn or so should provide proper tension regardless of where exactly you stopped turning..
-------------------------------------------------------------
dunno, i'm pretty much over it at this point (though i might draw the ram or something)... in the last thread, i was saying something like "the nmp will be the same or easier to service than the mp1"
after looking at it more thoroughly, i'm changing that up..
the nmp will
definitely be easier to work on than the previous version.. by a wide margin even..
i don't really know what it's going to take until people start to accept that.. maybe when ten or so service techs give great reviews on it's ease of tinkering? because that
is going to happen.. the designers havent made it worse.. they haven't left it the same.. they made it better