Hi Skip: I used the HP signature analyzer and found a bad data bus buffer chip is short order. I'm sure it would also identify a bad EPROM chip.
Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Web Cam Skip Withrow wrote: > Hello Time-Nuts, > > Well, my Austron 2100 seems to have bit the dust. The indication of trouble > is that the 1pps light quit blinking. After some debug it appears that all > the hardware is working (I have the manual with schematics) and that it is > not getting a software pulse that diddles a flip-flop. > > There are some software diagnostic routines in the box. The RAM test runs > fine, but it appears that I get an error on the EPROM test. The test > generates an E-20 error. The book states that if the EPROM test fails it > will give an E-21, but nowhere do I find any hint as to what an E-20 error > is. > > I suspect that perhaps I have a corrupted EPROM. Most of the code appears > to be working properly (front panel display and buttons work, it will even > lock to Loran). There are three 2732A EPROMS, but no indication as to the > checksum on the devices so can't verify if one is bad. > > Is there a time-nut out there with an Austron 2100? I would like to get a > copy of the EPROMS or the code in them to check my unit. Even the checksums > would help (given that the firmware revision is the same). The boards are > very easily accessed from the front panel and the unit doesn't even have to > be taken out of the rack. I have the capability to read and program the > devices. > > Thanks in advance for any help with this oldie, but (was) goodie. > > Skip Withrow > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
