Re: [volt-nuts] Datron 1281 NVRAM woes
Todd Micallef writes: > One interesting note is that on one meter the readout can give repeated > characters if upside-down. But once it is right side up, the display is > fine. The only thing that comes to mind is the EPROMs are failing. I plan > on upgrading both soon so I can try it again. > Hi Todd, did you mean that the display depends on the physical orientation of the meter? Lol! Maybe a bad solder point or so... Here, I am waiting for Eproms in order to proceed in the easiest direction, to start. I will keep you posted. Thanks for info! -Bert ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
Re: [volt-nuts] Datron 1281 NVRAM woes
I tested both 1281 since they are running different FW 1281 #1 FW 3.02 All four tests produced the same error when the cable was disconnected at the DCV, AC assy, Ohms assy, and Current assy. 9005 Serial Interface Fault 00150C 03 1281 #2 FW 3.11 Different error than above but it is the almost the same on all four tests. 9005.9 Ponntru/compl 00173A The DCV was slightly different at: 9005.9 Pon tru/compl 00173A. One interesting note is that on one meter the readout can give repeated characters if upside-down. But once it is right side up, the display is fine. The only thing that comes to mind is the EPROMs are failing. I plan on upgrading both soon so I can try it again. Todd On Thu, Apr 14, 2016 at 5:21 PM, Todd Micallef wrote: > I will get it this evening. Hope to be finished with work within the next > couple of hours. > > > On Thursday, April 14, 2016, Bert Kachler wrote: > >> Hi Todd and ??, >> >> thanks for your answers! >> I think it is a good suggestion to >> try to see first whether the Eproms are intact. Firmware is >> Version 3.11 and I have ordered new EProms to put >> a copy of the 3.11 firmware on them, the one >> from https://xdevs.com/fix/d1281/#manual . >> I will fire up my programmer the moment they arrive. >> >> What makes me ponder is that there were suddenly apparently >> two errors after a couple of month's inactivity. >> If two errors appear out of the blue more or less at the same >> time, IMHO it is likely that there is a common reason. >> Hence first the Eprom test. Then perhaps the voltages, >> I still need to figure out what they are supposed to be >> at the test points of the undocumented digital board. >> >> (I am not sure >> whether the NVRAM error came exactly at the same first turn-on >> as the "9005.7 No Rtx001B42" error, because it >> flashes only briefly and I might have overlooked it at first. >> I only noticed it after a few subsequent turn ons, when I tried >> to made a picture to the "9005.7 No Rtx001B42" error display.) >> >> Assuming that nothing of the above works, which is likely, >> then there is still the main question of what the "secondary" part of the >> NVRAM is supposed to be. If it happens just a secondary backup copy >> of the whoke memory, then there might be a chance to >> correct it (like for Solartron 7081 which does keep 2 copies of the data). >> >> I keep you posted. Thanks for your help. >> >> Cheers, >> Bert >> >> >> ___ >> volt-nuts mailing list -- volt-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts >> and follow the instructions there. >> > ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
Re: [volt-nuts] Datron 1281 NVRAM woes
I will get it this evening. Hope to be finished with work within the next couple of hours. On Thursday, April 14, 2016, Bert Kachler wrote: > Hi Todd and ??, > > thanks for your answers! > I think it is a good suggestion to > try to see first whether the Eproms are intact. Firmware is > Version 3.11 and I have ordered new EProms to put > a copy of the 3.11 firmware on them, the one > from https://xdevs.com/fix/d1281/#manual . > I will fire up my programmer the moment they arrive. > > What makes me ponder is that there were suddenly apparently > two errors after a couple of month's inactivity. > If two errors appear out of the blue more or less at the same > time, IMHO it is likely that there is a common reason. > Hence first the Eprom test. Then perhaps the voltages, > I still need to figure out what they are supposed to be > at the test points of the undocumented digital board. > > (I am not sure > whether the NVRAM error came exactly at the same first turn-on > as the "9005.7 No Rtx001B42" error, because it > flashes only briefly and I might have overlooked it at first. > I only noticed it after a few subsequent turn ons, when I tried > to made a picture to the "9005.7 No Rtx001B42" error display.) > > Assuming that nothing of the above works, which is likely, > then there is still the main question of what the "secondary" part of the > NVRAM is supposed to be. If it happens just a secondary backup copy > of the whoke memory, then there might be a chance to > correct it (like for Solartron 7081 which does keep 2 copies of the data). > > I keep you posted. Thanks for your help. > > Cheers, > Bert > > > ___ > volt-nuts mailing list -- volt-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there. > ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
Re: [volt-nuts] Datron 1281 NVRAM woes
Hi Todd and ??, thanks for your answers! I think it is a good suggestion to try to see first whether the Eproms are intact. Firmware is Version 3.11 and I have ordered new EProms to put a copy of the 3.11 firmware on them, the one from https://xdevs.com/fix/d1281/#manual . I will fire up my programmer the moment they arrive. What makes me ponder is that there were suddenly apparently two errors after a couple of month's inactivity. If two errors appear out of the blue more or less at the same time, IMHO it is likely that there is a common reason. Hence first the Eprom test. Then perhaps the voltages, I still need to figure out what they are supposed to be at the test points of the undocumented digital board. (I am not sure whether the NVRAM error came exactly at the same first turn-on as the "9005.7 No Rtx001B42" error, because it flashes only briefly and I might have overlooked it at first. I only noticed it after a few subsequent turn ons, when I tried to made a picture to the "9005.7 No Rtx001B42" error display.) Assuming that nothing of the above works, which is likely, then there is still the main question of what the "secondary" part of the NVRAM is supposed to be. If it happens just a secondary backup copy of the whoke memory, then there might be a chance to correct it (like for Solartron 7081 which does keep 2 copies of the data). I keep you posted. Thanks for your help. Cheers, Bert ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
Re: [volt-nuts] Datron 1281 NVRAM woes
Bert, I did a test not that long ago for another volt-nut by disconnecting the cable between the digital and DCV boards. I got the following error: "9005.9 Pon tru/compl 00173A". One of mine came with a 9005.7 00150C error and it turned out to be a disconnected cable on one of the option boards (resistance?). Most likely not your problem but it could indicate one of the option boards is not responding. I could try and make some time disconnecting each of the boards and reporting back their errors. It could narrow down your problem. Let me know, and I will clear some bench space after work. Also, another member had issues that were resolved by changing the EPROMs. Let me know which version you have. The same version may be archived on xDevs. If you have a programmer, you can verify your checksums against the archived copy. Agree with acbern on borked cals. A new cal and SRAM may be in your future if you can get the other error cleared. Todd On Tue, Apr 12, 2016 at 3:20 AM, Bert K wrote: > Hello, > > all of a sudden my beloved Datron 1281 stopped working. > If briefly displays the familiar > "DCV: Auto 100mV.." > but then > "Secondary NV C/SUM ERROR 2101" > and then > "9005.7 No Rtx001B42" > > The voltages from the DC board PS seem okay, also the > battery displays only a bit less than 3.7Vol. > > Obviously I wonder whether anything can be done here. > In particular I wonder about the NVRAM setup, > namely whether "Secondary" could be just a safety copy > of the "Primary". Or whether this is the less important > set of self-cal constants, etc. > I couldn't find any info in the various manuals. > > > Also the second error seems to have to do with > serial comm, and it is not evident that is has anything > to do with with the first error. If not, then they could have > a common underlying reason, like a faulty PS. > > The PS of the digital board is different than as the one > described in the manual, so I can't really check the voltages > meaningfully. Does anybode have schematics of this > second (I hear common) type of digital board? > Or knows otherwise what the voltages on the various > test points are supposed to be? > > Thanks, > Bert > > > ___ > volt-nuts mailing list -- volt-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there. > ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
Re: [volt-nuts] Datron 1281 NVRAM woes
What I would think is the case here (had that on a 4920 ac standard, similar/same CPU board) is that the SRAM has failed. Replacing it means a new calibration though. So you may wish to carefully check before. Are you in Germany? Can also drop me a PM. > Gesendet: Dienstag, 12. April 2016 um 09:20 Uhr > Von: "Bert K" > An: volt-nuts@febo.com > Betreff: [volt-nuts] Datron 1281 NVRAM woes > > Hello, > > all of a sudden my beloved Datron 1281 stopped working. > If briefly displays the familiar > "DCV: Auto 100mV.." > but then > "Secondary NV C/SUM ERROR 2101" > and then > "9005.7 No Rtx001B42" > > The voltages from the DC board PS seem okay, also the > battery displays only a bit less than 3.7Vol. > > Obviously I wonder whether anything can be done here. > In particular I wonder about the NVRAM setup, > namely whether "Secondary" could be just a safety copy > of the "Primary". Or whether this is the less important > set of self-cal constants, etc. > I couldn't find any info in the various manuals. > > > Also the second error seems to have to do with > serial comm, and it is not evident that is has anything > to do with with the first error. If not, then they could have > a common underlying reason, like a faulty PS. > > The PS of the digital board is different than as the one > described in the manual, so I can't really check the voltages > meaningfully. Does anybode have schematics of this > second (I hear common) type of digital board? > Or knows otherwise what the voltages on the various > test points are supposed to be? > > Thanks, > Bert > > > ___ > volt-nuts mailing list -- volt-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there. > ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
[volt-nuts] Datron 1281 NVRAM woes
Hello, all of a sudden my beloved Datron 1281 stopped working. If briefly displays the familiar "DCV: Auto 100mV.." but then "Secondary NV C/SUM ERROR 2101" and then "9005.7 No Rtx001B42" The voltages from the DC board PS seem okay, also the battery displays only a bit less than 3.7Vol. Obviously I wonder whether anything can be done here. In particular I wonder about the NVRAM setup, namely whether "Secondary" could be just a safety copy of the "Primary". Or whether this is the less important set of self-cal constants, etc. I couldn't find any info in the various manuals. Also the second error seems to have to do with serial comm, and it is not evident that is has anything to do with with the first error. If not, then they could have a common underlying reason, like a faulty PS. The PS of the digital board is different than as the one described in the manual, so I can't really check the voltages meaningfully. Does anybode have schematics of this second (I hear common) type of digital board? Or knows otherwise what the voltages on the various test points are supposed to be? Thanks, Bert ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
