An update: Unfortunately there was a freak accident in the workshop... I'm de-rusting some of the keyswitches and the on/off switch and figured after removing the rust I'd paint over the rusty areas (it's not ideal, but the best I could do).
One of the switches was "clean" so I temporarily installed it on the keyboard PCB. To paint, I was going to use a silver "paint-pen". While shaking the pen (according to the directions), the pen exploded and splattered paint on the keyboard and PCB. About 4 switches were inundated with paint and another 2 or 3 got some paint splattered on them. I spent about a half an hour cleaning the paint as best I could using 99 IPA, but there's still some paint on the PCB. A few hours later I checked some of the affected switches and I think the paint has dried inside them, because they're open circuits now. I tried De-Oxit, and they are revived, but I fear it's only temporary. My question for the forumbrain is: can the keyboard switches be disassembled for 'deep cleaning'? I would desolder them first, obviously. Thanks On Thu, Apr 20, 2023 at 10:48 AM Gregory McGill <arcadeshop...@gmail.com> wrote: > thanks! > > On Thu, Apr 20, 2023 at 4:14 AM David Plass <dpl...@alum.mit.edu> wrote: > >> I was surprised too but it's a near exact match. I tried the key caps >> and, while they're tight, they definitely fit. >> >> On Thu, Apr 20, 2023, 6:25 AM Louis Ciotti <lciot...@gmail.com> wrote: >> >>> I would have never thought these would have been used back when the M100 >>> was designed. >>> >>> Sent from my iPhone >>> >>> On Apr 19, 2023, at 10:03 PM, David Plass <dpl...@alum.mit.edu> wrote: >>> >>> >>> The function keys are 12x12x7.3mm tactile switches with square tops and >>> PCB/through-hole mounting pins. >>> >>> For example: >>> https://www.amazon.com/TWTADE-Momentary-Tactile-Button-12x12x12mm/dp/B07CG7VTGD?th=1 >>> or >>> https://www.amazon.com/ACEIRMC-12x12x7-3mm-Momentary-Tactile-Arduino/dp/B091HL5YBD/ref=sr_1_3 >>> >>>
