Just curious, what is so bad about the flux? It doesn't seem to be causing problems or corrosion.
-- Erik On Wed, Sep 24, 2025, 4:46 AM Josh Malone <[email protected]> wrote: > Every single Model 100 in the entire world needs the following maintenance: > * memory nicad replaced (modern NiMH is fine) > * Complete replacement of all electrolytic caps (complete recap) with > proper cleanup of leakage and corroded joints/traces > * Bath in ~100% IPA and scrubbing to remove factory flux residue > > Without these things, your M100 is dying rapidly. These are 100% must-do > repairs to all M100s now. I cannot stress this enough. > > -Josh > > On Tue, Sep 23, 2025 at 11:30 PM Erik Keever <[email protected]> > wrote: > >> Internal NiCad for sure. >> >> It's also possible/probable that the electrolytic caps are failing. >> Multiple caps in mine (the 1uF ones - the smallest) had failed and peed >> acid onto the circuit board when I came back to it after many moons. It was >> bad enough to sever the trace that brought the LCD bias to the display, >> resulting in a zero-contrast condition. At this point those electrolytics >> are 40 years old so recap is an excellent idea. >> >> On a tangent about the caps... the march of Progress has brought solid >> state MLCCs within easy reach of all the capacitances up to about 1uF. Just >> saying, MLCCs age far more gracefully (they DO age though, the high K >> dielectrics undergo a phase change that's reset by soldering temps), and an >> 0805 is just the right size to fit across two .1" thru hole pads... >> >> -- Erik >> >> On Tue, Sep 23, 2025, 6:53 PM John R. Hogerhuis <[email protected]> wrote: >> >>> Yeah if it hasn't been replaced it's probably the internal nicad. >>> >>> They all need to be replaced at this point. >>> >>> -- John. >>> >>
