Cool can you share the part On Wed, Apr 19, 2023, 11:35 AM David Plass <dpl...@alum.mit.edu> wrote:
> To answer my own questoin _again_, about half the function keys were > toast, but they seem to be a standard part (!) so I was able to order some > replacements. > > On Mon, Apr 17, 2023 at 9:00 PM David Plass <dpl...@alum.mit.edu> wrote: > >> Thanks. >> >> To answer my own question, the 1N4148 diodes worked perfectly. All the >> regular keys are working. The function keys, not so much. I've squirted >> lots of electronics cleaner and clicked each switch dozens of times and >> only a few of the 7 or so broken switches have come back. Right now I >> dripped some vinegar inside to hopefully break up whatever corrosion might >> be inside... >> >> On Sun, Apr 16, 2023 at 7:45 PM Brad Grier <b...@bradgrier.com> wrote: >> >>> RE: the polarizing film -- Jeff Birt (on this list) suggested >>> https://3dlens.com/ >>> >>> I have some, just haven't got to my project that needs it yet :D and >>> with the onset of spring, that one may sit for a bit. >>> >>> --Brad >>> >>> On Sun, Apr 16, 2023 at 2:10 PM David Plass <dpl...@alum.mit.edu> wrote: >>> >>>> I couldn't resist a recent M100 on ebay listed as "not working". The >>>> main issue was a dead contrast pot, which I have temporarily worked around >>>> and ordered a hacky replacement. >>>> >>>> The polarizing film is also very bubbly and no amount of smoothing made >>>> it stay flat on the LCD. Is there a known replacement for the film? >>>> >>>> Most importantly, I noticed about a half dozen non-functional keys. >>>> After disassembly I discovered corrosion on their diodes. Upon closer >>>> "inspection", said diodes disintegrated. >>>> >>>> So my second question is: Is there a particular diode I should replace >>>> them with? I have tons of 1N4148s, which look like a match (and >>>> electrically drop about the same voltage), but I can't find a spec for >>>> those diodes on the m100 schematics. >>>> >>>> Thanks >>>> -David >>>> >>>> >>>> >>> >>> -- >>> -- >>> Brad Grier >>> >>> >>>
