In my case, the driver transistor for the relay actually failed short. I replaced it and the problem went away.
On a diode test the failed part was happily conductive regardless of what I put on the gate, lol. On Mon, Feb 6, 2023, 18:40 <bir...@soigeneris.com> wrote: > The click you hear is the telco relay. The flux around the driver > transistor can turn conductive enough to trigger the transistor and thus > the relay. I have also seen this cause reset issues and other oddities on > the M100. > > > > Jeff Birt > > > > *From:* M100 <m100-boun...@lists.bitchin100.com> *On Behalf Of *Alex ... > *Sent:* Monday, February 6, 2023 2:39 PM > *To:* m...@bitchin100.com > *Subject:* Re: [M100] Low battery , crashes wipe the memory of both > M102/M200 > > > > A particularly nasty crash can make it do that cold-reset thing. I ran > into that countless times while trying my hand at assembly development > while using ROM2 and MFORTH. in that case the problem isn't that the memory > is totally erased but that some important part gets corrupted and the stock > ROM starts over from scratch. I couldn't tell you for sure what or how it > happens, but it can. > > Not necessarily the same as what you saw but I had an issue with my T102 > that caused low voltages and battery drain due to the cassette remote being > stuck on. The give-away for that case was if I carefully put the batteries > in, I could hear the relay click on and stay on, regardless of the state of > the on/off switch. It might be worth putting the machine on an ammeter and > see if it's pulling some excess current if your batteries seem to not last > as long as they should. > > >
