23 Apr
2020
23 Apr
'20
1:12 p.m.
Thanks for all the input!
@Chuck: I assume you are talking about a 100W incandescent light bulb, I
like that idea for current-limiting. And I agree a SMPS should cut off the
switch if it detects a short; not sure what kind of supply is in there but
I'll take a look.
@Patrick: There's a stamp on the unit that seems to indicate it was made in
1984 but yeah the eBayer applied power normally before I got it.
Thanks!
On Thu, Apr 23, 2020, 2:21 PM Patrick Finnegan <pat at vax11.net> wrote:
On Thu, Apr 23, 2020 at 11:59 AM Anders Nelson via
cctalk <
cctalk at classiccmp.org> wrote:
Cool, thanks for your take. I found some
articles:
-
http://www.angelfire.com/electronic/funwithtubes/steps_to_first_power_on.ht…
- http://www.angelfire.com/electronic/funwithtubes/Restore_cap.html
Given this unit doesn't have any tubes, I imagine the motor drivers/amps
in
this thing would simply go to zero output with shorted caps. The PSU might
blow the fuse and/or rectifier with a shorted bulk output cap. This unit
is
very difficult to remove from the rack it's in so I'm trying to avoid
preemptive repairs.
I'd personally say that since it hasn't been off for that long (less than
3 years) and since it sounds like you're not interested in taking it apart,
I'd just plug it back in, and see how that goes.
As a minimal step, I might disconnect the PSU from the rest of the drive,
and plug it in like that for a moment, but it's probably best to not run it
without a load for very long.
Pat