|Re: HP110 Battery (OK, it's not a calculator)|
Message #4 Posted by Steve (Australia) on 29 Oct 2000, 8:02 a.m.,
in response to message #3 by Steve (Australia)
Actually there's 11 screws (10 are hidden under things though)
The keyboard is labelled as being manufactured by Cherry. This is interesting because the PCB has an HP part number.
Even more interesting (once you get the keyboard out) is that the keycaps are easily removable, so you don't need to take the whole damn thing apart :-)
Anyway, with the key up, a sprung plastic cam holds a sprung contact apart. When you press the key the cam moves out of the way allowing the contacts to close. So pressing the key harder achieves nothing!
Possibly after so long, some of the sprung bits have become a little weak, so I removed the keycap, pressed the plastic post down, and gently pressed the contacts together with a screwdriver to sort of bend the spring into a more springy position. Voila! key works perfectly. No bouncing or failure to make contact.
As for adding more RAM. Well, maybe I'll persue this for interest in the future. I don't think I'll do it, but it would be interesting to see if it's possible.
When the unit is opened, you can see one part of the motherboard, but there is another layer of it under a shield. I didn't look in there, but maybe the board even has pads to place more RAM?
I like the 110 almost as much as I like my HP41's :-)
But I wish David Chambers didn't mislead me as to the manufacture of parts of the HP110 those many years ago when he was demonstrating it to me.
Anyone else (in Australia) remember David Chambers? Nice guy, but a bit fond of Safari Suits for my liking. :-)