6 Dec
2010
6 Dec
'10
12:21 p.m.
Interesting suggestion. I'll keep it in mind.
The good news is I
managed to (at least temporarily) fix most of the broken fingers -- I
found the broken off pieces of two of them stuck inside the mechanism
while cleaning it out, and they superglued back on very nicely. There
isn't a lot of force applied to these fingers, so hopefully they'll hold.
I suspect it would be OK for testing, but I wouldn't trust it if I was
restoring the machine (not evne if just for my own use). Some plastics do
degrade and turn brittle with time (the HP9800 keyboard bezles do, for
example), and I wonder if that's happeend here.
I would want to make new parts. I would use metal if there's no
requirement for them to be insulators, but that may be simply becuase I
have the tools to make such things.
I am not sure if a 3D pritner owuld peoduce a smooth enough part in
plastic for this. Worth a try if you have such a machine, I suppose.
The bad news is that even with the mechanism fixed, the machine still
exhibits the same problem. I'm wondering if it's the delay line memory
Other than the physical damage, do you have any reason to suspect the
delay line system at thiis point?
-- it appears to have taken a beating at some point
(the enclosure got
dented in somehow). I'm not really sure how to test it :). Need to dig
In my epxerience, the covers come off these delays lines quite easily. It
would be worth doing that just to look for damage inside (broekn
supports, cracked PCB (if there is one), etc.
up a service manual.
Did such a thing ever sxist?
-tony