Re: HP-35S disassembly photos? Message #9 Posted by Tony Duell on 25 July 2007, 1:18 p.m., in response to message #8 by Ren
That remindes me of 'ARDs Law of DECSA Construction' (The DECSA -- Digital Equipment Communication Server Aparatus, or something like that -- was an early ethernet-X25/etc bridge, with a PDP11/24 CPU in the middle of it).
Anyway, the law states 'The lower the importance of a part of a DECSA, the more screws hold it in place'. It is illustrated by the fact that :
All the main PCBs plug in to the backplane without any fixing screws
The PSU(s) are held in by 2 screws each
The fan tray is held in by 4 screws
But the grille over the fan tray is held in by an amazing 28 screws (yes, I counted them all out and back again when I had to dismantle a DECSA for repair)
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