On 03/07/2025 20:52, Paul Koning via cctalk wrote:
On Jul 3, 2025, at 2:26 PM, Wayne S via cctalk <cctalk@classiccmp.org> wrote:
That’s a good business practice anyway. You want your high price system up and
running as fast as possible, so not having to do more than cursory diagnostics
is a good thing I think deck realize that with the VAX and it’s remote the
diagnostic capability as for the board breaks, IBM used to do that for all the
boards they replaced. They even had a special board breaking tool.
My CE from IBM said that it costs IBM more to diagnose a faulty board than it
does to make a new one so that’s why they do it. Breaking the board also
ensures that the engineers won’t get caught up in a side project trying to
figure out what went wrong.
That's true for problems seen occasionally. When people realize a particular issue
appears "too often" it does become an engineering matter, because then it
indicates an issue with design or manufacturing or part selection.
For example, I remember a product that had a memory backup battery issue, which turned
out to be a change in plating for the battery holder. For engineering it turned into an
exercise in learning what "electrovoltaic series" means -- not something
familiar to most digital logic EEs.
paul
Folks,
I must say the chaos continues. I recently had the steering wheel
changed on my VW Tiguan, apparently a common occurrence.
I kept bleeping and telling me that "travel assist" wasn't available and
you couldn't disable the very loud beep.
There must be some design issue with the capacitive "buttons" or some
sort of wiring short....
... however chatting to the parts guy about some other bits he said it
must have cost VW a lot as it took them a while to trace the fault and
fix the wheels design.
.. in the meantime some cars went through multiple wheels....
Dave
G4UGM
