5 Jun
2005
5 Jun
'05
12:25 p.m.
Interestingly, in this unit, the front panel power switch is not used.
There is a jumper on the PC board which bridges the connector for the
switch. A new power switch was inserted in the back panel and wired
directly in the line.
About the UL listing, I thought it interesting how exposed line voltage
was. It's very easy to touch line voltage if you're not careful.
Rich
-----Original Message-----
From: cctalk-bounces at classiccmp.org
[mailto:cctalk-bounces at classiccmp.org] On Behalf Of Randy McLaughlin
Sent: Sunday, June 05, 2005 1:07 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: S100 address buss troubleshooting
From: <shoppa_classiccmp at trailing-edge.com>
Sent: Sunday, June 05, 2005 11:49 AM
Be careful
after turning off the computer and don't pull the cards
until you are sure the voltage levels have dropped
For that matter, if yours has a power switch on the front panel, be
careful what you touch in the vicinity of that switch, even after
you've turned it off!
The rightmost switch was truly a "user wires it how he wants" switch,
and when you bought an IMSAI it came with artwork to let you make a
transparency layer that matched the function you chose. (Which is why I find these arguments about keeping original front
panel
transparencies so amusing.)
Tim.
All of the S100 systems I've dealt with have had the line power exposed
somewhere, none would ever pass UL testing.
Randy
www.s100-manuals.com