Re: Star Wars Scaling Problem

Dave Downin wrote:
>
> Got a Star Wars board that is having problems. The problem is most apparent
> on the SCALING test screen. There are no Matrix errors or hardware errors.
>
> On the first part of this screen it draws a box that slowly and smoothly
> shrinks. About 3/4 of the way down it seperates at the top and shifts to the
> right. On the next scaling part (binary & linear) where it shrinks the box
> and stops at points along the way, it does just as it should with no
> seperation or anything.

Get a can of freeze spray. I think Radio Shack still carries it. It
may be called "Component Cooler" or some such. It chills down
electronic components, one at a time, and lets you track down
intermittent parts.
A capacitor may be the culprit in the D/A section, too.

I'd start chilling down the digital-to-analog converters, then the
op-amps. You may need another pair of eyes you help you in this,
because your arms probably aren't long enough to look at the screen and
cool the parts at the same time.

A precise heat source, such as a heat gun or a hair dryer, can help in
this, too.

HTH,

Matt J. McCullar
Arlington, TX
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Received on Fri Jul 14 06:45:04 2000