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HP25C repair, help needed
02-16-2019, 10:35 PM
Post: #38
RE: HP25C repair, help needed
First of all, thank you very much Andy !
We received the package, and we added a working ROM to the unit.
The RAM was not working, and even if it was, it should be a double density RAM, or we should add
two single density ROMs.
However, it was a big step forward, thank you very much !!

We also repaired the plastic foil with broken traces with the copper tape.
The copper tape was guaranteed to have conductive adhesive, which is somehow true,
we applied a thin strip to all the traces, and we recovered some of the keys.
Please keep in mind that before it was not working at all ...

Also, we practiced on how securely close a Wookdstock keyboard.
In our experience this was a very good result,
keys have a normal profile and click well.
We used Vinavil, while keeping the layers of the keyboard pressed together with some clips.

It takes a night to dry, and it must not be touched before,
but when it dries is quite strong and keep in place things, is not invasive and very clean.

Unluckily this has to be opened again, since not all of the keys are working,
we'll keep posting results, and if someone has a spare double density RAM we'll be more than happy
to buy it !

               

Edoardo & Alberto
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Messages In This Thread
HP25C repair, help needed - albertofenini - 01-15-2019, 09:24 PM
RE: HP25C repair, help needed - teenix - 01-16-2019, 11:49 AM
RE: HP25C repair, help needed - teenix - 01-16-2019, 11:37 AM
RE: HP25C repair, help needed - teenix - 01-16-2019, 11:39 AM
RE: HP25C repair, help needed - AndiGer - 01-18-2019, 05:51 PM
RE: HP25C repair, help needed - teenix - 01-17-2019, 01:04 AM
RE: HP25C repair, help needed - hewlpac - 01-16-2019, 10:35 PM
RE: HP25C repair, help needed - jebem - 01-17-2019, 08:29 PM
RE: HP25C repair, help needed - teenix - 01-17-2019, 05:39 PM
RE: HP25C repair, help needed - teenix - 01-19-2019, 03:39 AM
RE: HP25C repair, help needed - AndiGer - 01-19-2019, 06:09 PM
RE: HP25C repair, help needed - mpark - 01-24-2019, 07:50 PM
RE: HP25C repair, help needed - AndyWalter - 01-20-2019, 05:00 PM
RE: HP25C repair, help needed - AndyWalter - 01-20-2019, 05:37 PM
RE: HP25C repair, help needed - AndyWalter - 01-20-2019, 05:40 PM
RE: HP25C repair, help needed - mpark - 01-27-2019, 07:28 AM
RE: HP25C repair, help needed - AndiGer - 01-26-2019, 04:02 PM
RE: HP25C repair, help needed - albertofenini - 02-16-2019 10:35 PM
RE: HP25C repair, help needed - burkhard - 02-18-2019, 07:04 PM
RE: HP25C repair, help needed - ijabbott - 02-19-2019, 04:59 PM
RE: HP25C repair, help needed - burkhard - 02-19-2019, 05:09 PM



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