If you are getting RAM refresh errors with a device of that vintage, check the power supplies that feed the RAM chips. In those days, there was a second supply voltage (-12V?) that was used only for refreshing the data.
On Sat, Nov 13, 2021 at 12:27 AM Dan Rae via time-nuts < time-nuts@lists.febo.com> wrote: > Norman, > > From the code 0 7 26, if there is just one faulty RAM IC you will see > down the bottom of the screen a RAM hex number from 0 to F. On page 6-59 > in Volume 1 you will find a list of the IC numbers that correspond to > those RAM numbers. However since you seem to have an additional Error > Code 31 and the full list of RAM numbers displayed it is likely to be > more than a simple one IC failure. 31 indicates RAM refresh test error, > if that means anything to you, I'm a bit lost frankly. It might be > worth checking the board connections... > > Good luck! > > Dan > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send > an email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. -- --Jim Harman _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
