23 Feb
2009
23 Feb
'09
4:45 a.m.
Robert Jarratt wrote:
After removing all the boards and leaving just the
disk and tape drive for
load I impetuously decided to try powering it up. I knew the PSU (model
H7864) was set for 110V and made the switch to 240V (I am in the UK). When I
connected the power cord, after a few moments there was a loud pop, followed
by another before I could pull out the power cord, smoke rose from the PSU.
This sounded just like when I had once accidentally made a 110/240 mix-up.
The question is, could it be that I had not made the switch to 240
correctly, or could this just be down to the age of the PSU?
I haven't been into a BA23 PSU, so this is a question, not a
suggestion - does that PSU have a separate "jumper" plug for 50Hz/60Hz
switch?
I toasted an RA60 once by just flipping the visible switch from 240V
to 110V, not knowing there was a separate physical setting to switch it
from 50Hz to 60Hz. The behavior as it burnt up was
just like this.
Doc