25 Mar
2004
25 Mar
'04
10:10 a.m.
Tony Duell wrote:
Excellent points. I don't know if the voltages have changed; I just
noticed that when I first checked I only got 13v. Probably due to dry
caps, as you pointed out.
(time for that ESR meter :-)
-brad
Please don't module-swap classic
computers (this rant has been here before, you won't change my views on
it, I've seen the unpleasant reuslts all too often!).
Interesting point. And the first time I've heard it. I'll check the
archives... I'm don't disagree.
(having said that, I am fan of having spares, getting the unit up and
then going back and fixing the problem; I'd be curious to hear if that
is seen as bad form or bad idea).
I've had good luck swapping H744's and fixing them later, replenishing my
"spares" box ;-)
I also
"tuned" the 785 supply - it was lagging around 13v. I assume
cranking it up to 15 is the right thing to do.
Yes, if the reason for it being low was that you'd added extra loads. No,
if the reason for it being low was component failure in the -15V brick.
Asjustments rarely, if ever, drift. If some voltage is out of spec then
there's a reason. If it's something you did -- like adding an extra load
-- then yes, you use the adjustment. But if it's just gone down while the
machine is in use, you need to find out why. A dried up capacitor in the
brick probably.