Congratulations Dave very good to hear its back in the land of the living. Looking forward to the additional thread. Regards Paul WB8TSL
On Sun, Feb 7, 2016 at 12:37 PM, Artek Manuals <[email protected]> wrote: > I had reported earlier that the power supply went south in my Z3801A ( and > then the receiver) became a suspect as well > > In the final analysis I am not sure which went first the Z3801 supply or > the external power supply I use to power the unit.Both have a clear > failures.But both were down creating a little confusion at first about the > problem > > The external supply has an adjustable current limit setting which is now > nonadjustable at 150ma..have not dug into that one yet > > Once I figured out that my external supply was bust I switched to another > supply I have here in the lab to find that the internal Z3801A supply still > had a problem. As I noted in an earlier post there is a "pre processing" > section which I am told was really a over-voltage protection section and > the DC-DC converter section. The problem fortunately is in the the voltage > protection section and I have not bothered to run it down.Instead I have > reverted for now to bypassing the front end of the supply and am now > feeding 36V directly into the DC/DC converter an easy thing to do at the > output of L1 with a simple and convenient trace cut. SO not sure which > supply took out which supply but for now the unit is powered on another > supply .with the overkil / over-voltage circuit bypassed > > A few days after I started things back up the receiver began to error out. > At first it would error after 8 hours, then after an hour and now it only > lasts about 20 minutes. Again no obvious suspects on the receiver board in > terms of smoked caps etc. At that point another list member who has a cache > of Motorola Oncore boards that I knew well from another list offered to > send me a replacement Moto receiver, which turned out to be plug and play > compatible. the new-used receiver fixed the problem in spades so we are > back with a working Z3801A. I will cover the receiver update from an Moto > 6CH Oncore to a 8CH VP Oncore in a separate post > -- > Dave > [email protected] > www.ArtekManuals.com > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > > _______________________________________________ > 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.
