Usually DeoxIt clears up the contrast pot. Just spray it, don't worry about overspray, operate it a few times, wait an hour, operate a few more times, then possibly wait some more for the interior to dry. Can possibly take as long as a couple weeks if it was really drenched.
The entire screen may go faint while it's wet but it comes back as it dries, don't worry if you see that. Also check for bad solder joints since the pot is subject to mechanical force from outside. Always possible it took a hit somewhere along the way in 35 years. bkw On Fri, Jul 16, 2021, 10:28 PM Earl Baugh <[email protected]> wrote: > Howdy! > > I’m new to the list and recently picked up a model 100 that needed some > restoration. A friend helped me get the bad caps replaced, cleaned the > power plug and we diagnosed a bad member switch and bad pot for the lcd > contrast adjustment. It’s working again (hurrah), with a solder bridge on > the switch and some resistors temporarily in place of the pot. ( we also > removed the battery before any leakage or damage ) > > Is there anyplace where I can get replacement parts for the pot and switch > without digging thru a Mouser or Digikey catalog? ( or the part numbers at > least to save a number of mis orders? 😊) > > Earl > > > Sent from my iPhone
