MOTM

I too have had this problem.  Checking for shorts on the jacks is a great
place to start when
troubleshooting a module.  And checking for solder bridges on switches.
That's my experience anyway.

tomr


----- Original Message -----
From: David Bivins <dbivins@...>
To: MOTM <motm@egroups.com>
Sent: Tuesday, May 09, 2000 2:37 PM
Subject: [motm] Troubleshooting a short


> Hi all,
>
> I had some trouble with the 700 vc router I just built. Luckily, Paul was
> available for some live tech support and I got it sorted out. Because the
> problem seemed like it *could* conceivably happen more than once, I'd like
> to tell you all about it.
>
> The way the coax attaches to the jacks, the braid is pulled to one side
> first and twisted. On a particular strand of coax, the inner insulation
had
> melted or been cut through (very fine break) and the braid was resting
> across it, causing a short. I couldn't see this at first and went through
a
> lot of trouble disassembling the PCB sandwich, etc.
>
> So if you're having trouble, don't forget to look at the easier solution
> first. I had carefully scanned the PCB twice, including verifying
component
> placement, before I looked at the other end. And considering the iron
> proximity we have to work with sometimes when wiring the front panel, it's
> fairly easy to slip and melt a bit of insulation.
>
> David.
> http://www.mp3.com/baldbastard
> http://www.mp3.com/stations/baldbastard
>
>
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