Thank you Bill, I'll start looking at the power supplies. Dave - W6TE
> From: [email protected] > To: [email protected] > Date: Fri, 26 Dec 2014 16:36:00 -0800 > Subject: Re: [volt-nuts] HP 3456A -3 Fault > > Dave: > > These things are NOTORIOUS for filter cap failures in the power > supplies. Check both the voltages and the RIPPLE on the various power > supplies. It is not sufficent to just check the voltages. You must check > the ripple with an o'scope. At least this is the first step before looking > for anything else. > > Good luck, > > Bill > > ----- Original Message ----- > From: "David Smith" <[email protected]> > To: <[email protected]> > Sent: Friday, December 26, 2014 3:34 PM > Subject: [volt-nuts] HP 3456A -3 Fault > > > > Hello Friends, > > I have two HP 3456A's that have the same "-3" fault in the "test" mode. > Both DVM's started exhibiting this same fault about the same time. I've > troubleshot one of the DVM's to a failure in the Isolation Logic > "Transmitter." I have no waveform at the output of A3T1. > > Before I continue with troubleshooting I thought I'd ask a question of the > group. Is there a common mode failure of these DVM? Is there something in > particular or area that I should be looking at/for? > > It's probably coincidental that they would both fail at about the same > time with the same -3 fault. > > Your input is greatly appreciated. > > Best regards, > > > > Dave - W6TE > > _______________________________________________ > > volt-nuts mailing list -- [email protected] > > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > > and follow the instructions there. > > _______________________________________________ > volt-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there. _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
