24 Nov
2001
24 Nov
'01
12:03 p.m.
From: Pete Turnbull <pete(a)dunnington.u-net.com>
The front bezel (frame round the panel) has been
repainted white, and
the
paint has flaked or chipped off in places, to reveal a
chipped coat of
beige paint. I'd like to refinish and respray it. What's the correct
colour?
DEC gray #68 A color close to eggshell toward very light gray.
I'm toying with the idea of replacing the LEDs with
bi-pin bulbs, as the
panel was originally a bulb panel. The resistors for the warm-up
current
have been clipped out. What value should they be?
leave the leds, likely that mod was done very long ago. The lamps
tended to die too often.
What's J5 (3-pin Mate-N-Lok) on the PSU for?
Power controller.
astly (for now :-)), which direction should the fans blow? The fans
in this machine are not original, and I suspect they
were put in
back-to-front. They were drawing air in from the right (as you look
from
the front) of the machine, through the cards, into the
PSU, and blowing
it
out through the six large heatsinks and out of the left
side of the
machine. I think this is the wrong way round, as the laminar flow over
the
cards won't be as effective as the turbulent flow
in the other
direction.
But what's the normal way in an 8/E? And was
there supposed to be a
filter anywhere?
Unknown on direction, I think "out". Filter was a layer of foam where
there
was one. I have a an 8f so they are somewhat different but the fans blow
in
across the cards. The PS in the reaw with its own fan. The 8e has the
power supply down the left side(facing the front from front) and thefrom
right
(input) to left (out through the PS). The power supply will tolerate
higher temps
if memory serves than core. Keeping the core cool and at a relatively
constant temp was the key to stable ops.
Allison