Can you buy the A/D board... here in USA they will not sell the parts anymore. If you need a front panel because the display is dim or one of the keys will not work it cost the same as any other repair.
acben, what was wrong with your A/D? The typical rundown error seems like it would be real hard to repair and most of the circuit is contained in proprietary chips. I am impressed. would love to be able to repair the A/D board. That and the AC board are the highest failed boards I see. On Sun, Jul 6, 2014 at 4:56 AM, R.Phillips <[email protected]> wrote: > I note with interest your considerations with restoring the 3458A. I have > recently had my 3458A restored (April-last) to fine working order, and > calibrated by the Agilent Service Department here in the UK. It will cost > what is required after their inspection - this inspection is a 'free' > service which gives you a full appraisal, and a price for what has to be > done to restore the instrument to 100% working order followed by > re-calibration. If the cost is unacceptable, you can request the return > your instrument back with a report on what would be required. The reality > is that many owners have tried to make a 'cheaper fix' and finished up with > an unsatisfactory result, as Agilent are not try to calibrate a faulty > unit. Over the period of the models production, a number of changes have > been introduced, I now have the latest type of processor/RAM/ROM board > which is much improved. Considering the cost of a new instrument, I would > suggest this is the best solution. I found the staff here in the UK to be > very helpful and willing to discuss any technical matter. > Roy Phillips. > > -----Original Message----- From: [email protected] > Sent: Sunday, July 06, 2014 9:45 AM > To: Discussion of precise voltage measurement > Subject: Re: [volt-nuts] Buying HP-3458A > > > I recently bought a non-working 3458, so faced the same problem. it was a > relatively old unit, and I asked agilent germany (where I live) for a > standard repair quote. they answered they would not give a fix price, they > would evaluate the costs once received. it may have been linked to the age > of the unit (SN arround 3k). I would therefore think that in other places > in europe the response may be similar. it may be differnt in the US. > I determined the A/D board was faulty, and I did a check on that, it would > have been considerably cheaper to just replace this. so for me, since I am > also calibrating the unit myself, it would anyway have been a bad deal. > fortunatelly I could fix the a/d myself, so could save this as well. given > my buy price and list price for the a/d baord, it would otherwise probably > have been a no so good deal. so I would say there is really some risk > involved buying an old gear. also, keep in mind, boards may work but still > be out of spec. so you may need a new A/D board just to figure out later > that the ac board is not within specs either. > key I guess is that the error messages give you a reasonable understanding > whats wrong. find out the cost of this board, and if thats ok in total it > may make sense, but you still have quite a risk as the other items may have > an issue as well. if a unit is completely dead, I would probably not buy. > as far as i know you cannot buy a new PU board allone, you need to send it > in to repair (thats what agilent germany states on ther parts list side), > and then it may be very costly if other stuff it broken too. > > > Gesendet: Sonntag, 06. Juli 2014 um 07:03 Uhr >> Von: "Dr. David Kirkby (Kirkby Microwave Ltd)" < >> [email protected]> >> An: "Discussion of precise voltage measurement" <[email protected]> >> Betreff: Re: [volt-nuts] Buying HP-3458A >> >> On 6 Jul 2014 07:12, "John Phillips" <[email protected]> wrote: >> > >> > They do really offer that service as long as you send them a complete >> > meter... No missing parts. Well they will take a few missing screws and >> > such. >> >> There is also the possibility someone has tried repairing it, but done so >> badly. >> >> I assume that there has been some design changes over the years, so not >> all >> boards are identical. Agilent would probably decline to fix a unit made >> from parts from a mixture of revisions. >> >> Buying one and hoping to get it repaired for a fixed fee seems a bit risky >> to me. >> >> Dave >> >> My experience with them is they charge the same no mater what need to >> > be fixed. Not sure what the price is, there prices are country > >> dependent. >> I >> > thought it was a little more than $2200 last I checked. >> > >> > >> > On Sat, Jul 5, 2014 at 4:08 PM, Randy Evans <[email protected]> >> > wrote: >> > >> > > I am in the market for a used HP-3458A and, in researching past >> messages, I >> > > came across an interesting question: >> > > >> > > *Chris Erickson* ericksonc2 at comcast.net >> > > <volt-nuts% >> > > >> 40febo.com?Subject=Re%3A%20%5Bvolt-nuts%5D%203458A% >> 20questions&In-Reply-To=%3C001b01cc7960%24a15d2840%24e41778c0%24%40net%3E >> > > > >> > > *Thu Sep 22 19:48:41 UTC 2011* >> > > >> > > If Agilent will fix everything, bring it up to specs, and calibrate it >> no >> > > >> > > matter what's wrong with it for $2200, then why would I spend >> $5000-6000 or >> > > >> > > more for one that is in good shape - even if calibrated? Just grab the >> > > first >> > > >> > > bargain that comes along for $1500-3000, send it straight to Agilent >> and be >> > > >> > > money ahead. Seems the better course of action to me if that price is >> > > >> > > accurate - do they really offer this service? >> > > >> > > >> > > >> > > >> > > I could not find an answer to this question but it does beg the >> question. >> > > Does nayone have an answer as to why not buy the cheapest unit and >> send it >> > > in for repair? >> > > >> > > >> > > Thanks, >> > > >> > > >> > > Randy Evans >> > > _______________________________________________ >> > > 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. >> > > >> > >> > >> > >> > -- >> > John Phillips >> > _______________________________________________ >> > 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. > > _______________________________________________ > 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. -- John Phillips _______________________________________________ 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.
