[Coco] Help reviving an old CoCo 2

[didier derny]

Most of the parts are available from www.utsource.com for some and www.jameco.com for others
So except if it was mechanically damaged or if burnt it is probably possible to repair it...

For my coco 2 I made a coco 2 "repair box" with a spare for each parts

If you want I can check my invoice an tell you where I found each specific part...

For the video I made a composite video interface with the schematics available on the web.
For the cassette, I used my sound card with 2 cables founds on amazon.

My 16k coco2  looked liked dead now it is working perfectly
- 64k ram
- composite video (perhaps ypbpr later)
- cassette connected on a PC
- drivewire with cloud9 cable
- cocoSDC for the disk
- later I'll connect a homemade Bluetooth keyboard
  (so I'll be able to switch video/keyboard and use my pc keyboard / screen for the PC and the Coco

I think it would be a shame to reduce a coco2 to a pile of spare parts...

--
Didier

-----Message d'origine-----
De : Coco [mailto:coco-bounces at maltedmedia.com] De la part de Arthur Flexser
Envoyé : lundi 24 novembre 2014 20:23
À : CoCoList for Color Computer Enthusiasts
Objet : Re: [Coco] Help reviving an old CoCo 2

Even if it doesn't work, might be useful as a source of chips to try swapping with identical ones from the other controller to see if that revives the first one.  A bad WD1773, the main disk controller chip, seems like a likely suspect.

Art

On Mon, Nov 24, 2014 at 8:30 AM, John Goerzen <jgoerzen at complete.org> wrote:

> Arthur Flexser <flexser at ...> writes:
>
> >
> > You might try removing and resocketing any socketed chips in the 
> > disk controller to get rid of oxidation there.
> >
> > Art
>
> I gave it a try - no dice.  Perhaps one of the chips is just bad itself.
>
> I saw a FD-501 pak on eBay over the weekend and bought it.  I hope it 
> works (it's sold "as is").  From some reading, it looks like it has 
> gold-plated instead of tin contacts, at least.
>
> John
>
>
>
> --
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> Coco at maltedmedia.com
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>

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