On Fri, 21 Oct 2005 01:26:14 +0100 (BST)
ard at p850ug1.demon.co.uk (Tony Duell) wrote:
Somebody earlier claimed that IBM didn't bother
with termination on the
disk drives in the PC family.
I've just looked in the 'Hardware Maintenance and Service' manual for the
PC/AT. This is the only HMS manual I have (I don't normally bother with
boardswapper guides),
I know you disagree with a 'boardswapping' culture deeply and do so with great
conviction, but it's important to understand that there has always been a hierarchy in
computer servicing. Customer Engineers have often only been trained to the level of
identifying pulling and swapping boards, which then are shipped to a facility where expert
troubleshooters do the component level testing and repair.
I personally have worked in such a component-level board reworking facility. There are
often fabulously skillful troubleshooters working at those benches. Often this repair
function is carried out in the same facility where production rework is accomplished. And
it would be a severe waste of expertise and skill for these people to be out driving
around to customer sites performing mundane tasks.
Boardswapping has a place and is a legitimate part of the history of computers going way,
way back. It is how things were and are done, and it's not something to look down on.
Of course, when working on vintage hardware where there is no longer a repair depot to
ship the boards to, it is obviously a different matter. Restoring and operating old
equipment is an artisan-type task.
It's important not to pretend, however, that the published 'board swapping'
service manuals are an abomination before nature. In many cases the detailed manuals and
docs never leave the repair depot, which is a shame and a real loss for us today, but not
a reflection of technical ignorance.
--
http://sasteven.multics.org/MacSE30/MacSE30.html