[Coco] Re: Help! A CoCo2 died on me!

[Fedor Steeman]

Hi all,

As far as I could see so far, nothing has loosened or is short circuiting
anything. I will keep on looking. I will try to see if I can get an
oscilloscope somewhere and then start figuring out where the problems may
lie.

In the meantime, for those interested, I have made a simplified schematic
drawing of the way the video mod board is hooked up. I was not able to
examine the exact circuitry of the board itself, because I cannot see the
underside of it, so I cannot see how the different resistors and other
components are wired up and connected to the different wires coming out of
it.

http://www.coco3.com/gallery/v/User+Albums/CoCougar/BrokenCoCo2/Diagram.gif.html

Cheers,

Fedor

On 17/06/06, Robert Gault <robert.gault at worldnet.att.net> wrote:
>
> Fedor Steeman wrote:
> ><snip>
> > However, I do not own an oscilloscope, although I may know someone I
> > perhaps
> > could borrow one from. But wouldn't a simple volt-meter do for now?
> >
> > Thanks so far,
> >
> > Fedor
> >
>
> There really is very little that can be done without a scope if there is
> no video output.
>
> However, start by making sure that there are no shorted wires or parts
> touching. Then use a volt-meter to check the power supply voltages. Make
> sure that you have +5v where needed. There is a good chance that you
> have blown the +5 supply when something loosened during transportation
> shorted at the first turn-on .
>
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