my 2 cents, I think that 4.3V is common on the 3 cell NiCd when it is being charged by the system. After unplugging it, it will likely drop to 3.7 to 3.6 and hold well. If it is bad, it won't hold 3.6V.
never bad to replace though. On Fri, Mar 13, 2020 at 10:50 AM B4 Me100 <[email protected]> wrote: > Congratulations! Welcome to the Model T102 owners club :) > > From the motherboard pic the battery looks like an original Yusa I doubt > it has been replaced. At 4.3V it is bad it should be around 3.7V when off > to allow the SRAM to drop into their lowest standby current. As Josh would > say it should be replaced immediately. I would also carefully check all > the electrolytic caps for signs of leakage or out gassing. Probably > replace those too while the lid is off the box they are at end of life and > could give trouble down the line. > > Does the battery box have signs of a battery leak? Might want to check > around the box to make sure it has not leaked onto the PCB sometimes they > have and can destroy the PCB under the battery carrier leading to RS232 > failure – at least on a T102 I have. > > On the ROM you might want to look at building your own. The ROM images are > available and with the range of available PCBs at OSH park they are quite > easy to build. An original ROM is quite rare and a little fragile > depending on how they were constructed – there seems to have been quite a > selection of methods used to fill that OPT ROM socket in the past :) > > From: M100 <[email protected]> on behalf of Tom Wilson < > [email protected]> > Reply-To: <[email protected]> > Date: Friday, March 13, 2020 at 1:46 AM > To: M100 Mailing List <[email protected]> > Subject: [M100] T-102 is here! > > My 102 has arrived, and she's in good shape! > > This is serial 807001339, manufactured in 1988.7 (I assume that's July), > and it appears that the RAM chips are all soldered in: It has 32K of RAM > and no empty sockets (just the empty option ROM socket.) > > Surprisingly, the backup battery appears to be brand new! I've had the > machine open for about half an hour now, and the battery still reads 4.3v, > with no AAs inserted. The soldering job on the battery is impeccable. > > On a side note... does anyone have a TS-DOS ROM? Or something that > includes DOS, like the Ultimate ROM? > > Picture time!! > > > <snip> >
