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IIvx cases

unity

unity

68020
As far as I know, the IIvx is the first to use the case design. Along with the IIvi. I found an oddity I can not figure out. On one unit, I have vents on the top and side. On another, just on top. Also on the one with vents just on top, there is a secondary metal assembly that seems to be for air flow. Its not present on the top with vents on top and side.

What do your IIvx look like? Vents on one side or not? Metal sub-assembly inside? Was this a running change? Because the one with vents on one side and top are from a very, very early machine.

 
Just did a quick look at my IIvx and it also has vents on top and side. I'll have to pull it apart some time to check for the sub-assembly.

 
Here ya go. The Daystar one is a unit I have had for some time now and I think a very early unit. But not sure because there seems to be something wonky about IIvx serial numbers. Its like 90% were made in one month. Anyway, the other is the one I just got and has several oddities. I thought the vents were oddities until I found a few others with them. But in my short lookings, so far no 7100 has vents on top and bottom, just top.

So I need to look at other units that shared.

Either vents on the side was part of a very early run or due to where it was make, Singapore versus Ireland for example. But I have not dug into that yet or even if they were made in more than one location.

IMG_2441.JPG

IMG_2440.JPG

 
AHA! That's not ductwork for cooling, it's a front to back reinforcement structure for the perforated section of the shell. By the time the Quadra/Centris versions were released, 16" monitors were coming into general use. IIRC, the case was rated to support the Macintosh 16" Color Display (47lb.Trinitron) and the earlier 68030 variants probably weren't.

Dunno where I found that monitor/case support compatibility info, but it rings a bell pretty hard and it makes sense to me.

 
My IIvx has the perforations. My Quadra 600 does not. I no longer have a 7100 to check, but my bet would be that it's an early/ late development in the case design, which was used and reused for 68030, 68040 and PPC601 machines.

 
Just checked my IIvx it has vents on side and top with the extra support. Centris 650 is just the vents on top. I believe the Centris was right after the Iivx with that case design, so guessing the two sets of vents is for Iivx only. So case covers must have gotten mixed up somewhere.

 
beachycove said:
.  .  .  my bet would be that it's an early/ late development in the case design, which was used and reused for 68030, 68040 and PPC601 machines.
Click to expand...
My bet's the reason for such long term usage would be that it represents the only decent case design from Quadra 700 thru the Beige G3 drawbridges.

edit: with the notable exceptions of the Duos Docken which were also rated for 16" case crushing Trinitrons. My vote for best/most creative industrial design to emerge from the infinite loopiness would be the DuoDock. Soooo many elegant engineering solutions in one wholly injection molded piece of sculpture.

 
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That should have been Quadra 650 a couple of posts ago.

I think the Performa 600 that I used to have also did not have the perforations, but that case has gone off to its reward so I can't check. Anyway, the point seems to be that there was overlap and that for a while, both case designs were used on at least one of these models -- maybe more. This was not unusual. I've seen both LCII (line) and LC475 (plain) style cases stuck on an LCIII.

Duos are interesting beasties, and the Duodock is a wonderful thing to behold. But those power supplies are finicky. I still have two here somewhere, both needing the ps fixed...again.

 
Well the display weight issue makes sense. Vents on top and side would make that whole area deflect. And with no way to shore up the side ones properly without interfering with cards, I can see why they removed them from the design.

So it would seem the very early boxes had vents top/bottom.

Still wonder about that piece that is welded in for the top vents.

 
Speaking of cases, how does the CD drive mount inside? Mine has two black rails, one on each side. To remove, one pushes the tabs inward and it slides out with a bit of fuss.

 
unity said:
Speaking of cases, how does the CD drive mount inside? Mine has two black rails, one on each side. To remove, one pushes the tabs inward and it slides out with a bit of fuss.
Click to expand...
The cd drive is screwed to the rails, and you shove it in.

 
So I pulled apart my IIvx today and verified I have vents in top and side with no structural support inside and no evidence that there ever was any kind of support. I couldn't find a useful date anywhere but s/n is F2249JWZ3BF if that's helpful.

Now my Centris 650 does have support along with vent holes on top only. Than s/n is F1304BZYCC1.

 
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