Re: Multilayer board, track tracing?


"Arfa Daily" <arfa.daily@xxxxxxxxxxxx> wrote in message
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"N_Cook" <diverse@xxxxxxxxx> wrote in message
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Any tips for single ended signal injection and tracing for high
resolution
tracing , floppy/HD head as searchcoil ?



I would have thought that any tracks which passed internally between power
and ground planes, would have struggled to radiate enough signal to be
picked up in the way that you are envisioning. Also, where there are
fine-pitch 'bunches' of tracks which run parallel to one another for any
distance, I would think that crosstalk might become a problem to this
technique. If such a board has any (internal) tracking problems, I don't
think that you are going to do a lot with it anyway. Even if it is just
generally faulty in some way, if the board is complex enough to require
multi-layering, I think you are going to be pissing in the wind attempting
a (commercially viable) repair without the benefit of at least schematics
...

Arfa



I would second that. I doubt the time and effort spent in attemptng this is
time and effort well spent. You'd be better off going for a nice walk in
the countryside instead, after telling your customer this is not a viable
repair. Which you or he wll end up doing anyway.



Gareth.


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