4 Sep
2009
4 Sep
'09
12:50 p.m.
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-
bounces at classiccmp.org] On Behalf Of Tony Duell
Sent: Friday, September 04, 2009 11:03 AM
To: cctalk at classiccmp.org
Subject: Re: Omrom programmable terminal
Why, if you're an authorized [insert company here] field service engineer, you replace
the entire subunit containing the offending component, of course. <sigh> -- Ian
I have the signature analyser and the logic
comparator.
The signature analyser is usefull if you have a HP equipment with the
according serv. Manual under test.
Sure, the service manuals often give the signatures. So you connect up
the signature analyser (start/stop/clock leads) and stick the probe on
a
given point. If the signature agrees with the one in the manual, fine.
If
it doesn't, then what? OK, there's a fault, but in a lot of complicated
systesm, particularly if state-machine or microprocessor based, a fault
just about anywherre will corrupt all the signatures, So how do you
determine which device has actually failed?