RE: Amplifone brown jumpers

Thanks everyone for the feedback. I'll take the advice and rework my
deflection boards so that there are no zero ohm resistors!

Joel-

> -----Original Message-----
> From: jwelser@ccwf.cc.utexas.edu [mailto:jwelser@ccwf.cc.utexas.edu]
> Sent: Monday, August 19, 2002 11:02 AM
> To: 'vectorlist@synthcom.com'
> Subject: Re: VECTOR: Amplifone brown jumpers
>
>
>
> No, I've never observed these to cause a "catastrophic" failure
> mode -- they will just up your stress level a lot.
>
> What's always happened to me was that when I was
> debugging a no-HV
> on an Amplifone, I'd find I had no LV. Naturally, I'd replace the
> (presumably bad) regulators on the HV board, only to still have no LV.
> Then I'd think to check the input voltage to the HV board,
> find it wasn't
> there, and find it was because one of those $%&#@&*($@
> zero-ohm resistors
> opened up.
>
> So, no catastrophic failures, but the failure of the zero-ohm
> resistors is VERY common and is something that seems to be
> overlooked when
> initially working on a HV board (maybe because the zero-ohm resistors
> aren't on the HV board <shrug>)
>
> Joe
>
> On Mon, 19 Aug 2002, Rosenzweig, Joel B wrote:
>
> > I've read people recommend that we replace the zero ohm
> resistors with
> > jumper wire. What's the failure mode that I'd see if I had
> one of these
> > zero ohm resistors open up? If one of these does open up,
> does it destroy
> > other components with it, or does the failure end there?
> For some reason,
> > I've ingored this piece of advice when reworking the
> Amplifone boards, but
> > it finally occured to me that might not be such a good
> idea. (So, maybe it
> > takes 50 times to drill into my head.. ?)
> >
> > Thanks,
> > Joel-
> >
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Received on Mon Aug 19 08:30:05 2002