Good, let us know how it works out ! On Thu, Nov 27, 2025 at 6:08 AM me--- via cctalk <[email protected]> wrote:
> Someone else responded directly with me and the same suggestion but > provided > a link on amazon. > > So, I'm going to go with both your suggestions. > > Thanks, > > Daniel > sysop | Air & Wave BBS > finger | [email protected] > > On Wed, 26 Nov 2025, Adrian Godwin via cctalk wrote: > > > I don't know what the internal construction of the TRS-80 keyboard is > but > > there a number of products targeting remote controls with a > > conductive-rubber bubble over a gold-plated pcb. > > > > These vary between paints, entire keypads and small conductive rubber > discs > > which cover the original rubber patch. As long as the bubble hasn't > cracked > > but only the conductive material has worn thin, these last seem as though > > they might be the best and least invasive repair option. Easily available > > on ebay, some from reputable suppliers - maybe chemtronics ? > > > > > https://www.eevblog.com/forum/repair/best-method-to-restore-conductive-keypads/ > > > > On Wed, Nov 26, 2025 at 1:10 PM me--- via cctalk <[email protected]> > > wrote: > > > >> I just acquired a TRS-80 model 102, my first of that model. > >> > >> Everything is great other than three keys. The 2 keys works > >> intermittently, > >> q, and [ don't work. Having checked the schematic, the keys have no > >> commonality on the circuit. > >> > >> Before I pull the cap off the switch, I know that the rubber dome inside > >> has > >> material on the inner part that meets with the silver contacts to > complete > >> the circuit. I'm told this material will wear out or lose conductivity. > >> > >> I reflowed the solder joints on the pcb and this didn't help. Other > people > >> have simply replaced the rubber dome from another dead 102's keyboard. > >> But, > >> I'd rather attempt applying new material inside that dome. > >> > >> I'm hoping there is an inexpensive and mainstream solution I can buy at > >> home > >> depot or something. > >> > >> Any tips? > >> > >> Daniel > >> sysop | Air & Wave BBS > >> finger | [email protected] > >> > >
