My first HP41!

[aurelio]

(11-26-2015 09:02 AM)ElectroDuende Wrote:  

(04-13-2015 10:32 PM)ElectroDuende Wrote:  Some days ago I bid for a 41C. It was (I think) a bargain (about 35 euro) because it was not working and provided "as is". This means that the battery flex circuit is completely corroded and all covers are missing. Anyway, I took the risk... and nobody else chose to, so I won it.

[...]

For the moment I'll just order the replacement ribbon circuit and will try to print the covers in a 3D printer using the files available around the forum.

I'll post my advances!

Well after my fist post about this restoration prject (and well over my intended finishing date) I have finally ended the work on this calculator!

As I said the calculator was in very good shape (excepting the flex circuit) but missing all "complements", so I ordered:

- flex circuit from D.Diaz
- Battery tray, port covers and side cover from Shapeways
- battery springs from an ebay source mentioned by Sylvain

And when I finally found the time, I put everything together, making this little thing alive again! There are still a couple of things that mke it not to be "perfect":

- There is some dirt under the display protector. Apparently the only way to clean it is desoldering the LCD and, despite being quite a qualified solderer (I've melted several tin rolls in my life) I fell a little anxious about it.
- Key [3] is a little mushi. It doesn't have a clear "click" as the rest do, and key [2] makes if softer than the rest. I'd try the deox-it, but this unit has the control board held in place by a couple of nuts, and I've read that removing them will likely strip the outer thread of the posts, and is, obviously, something I'd like to avoid.

And, of course, I still need to check that the ports are working... I think I'll order some cheap mem module or aplication pac from ebay...

Pictures from the unit:

Congratulations for your restoring work, what a satisfaction to see it still alive!!
It's a tall key if i'm not wrong, congratulations twice