[time-nuts] HP 3458A schematic/service manual request

Robert Benward rbenward at verizon.net
Mon Jun 7 21:27:14 EDT 2010


Jeff,
Based on the completed prices on Ebay, you may want to consider getting it repaired by Agilent.  The cheapest on Ebay 
was $2000, and it went up from there.  I can also give you a few cal labs that do repairs as well.

Bob


----- Original Message ----- 
From: "Robert Benward" <rbenward at verizon.net>
To: "Discussion of precise time and frequency measurement" <time-nuts at febo.com>
Sent: Monday, June 07, 2010 8:54 PM
Subject: Re: [time-nuts] HP 3458A schematic/service manual request


> Hi Jeff,
> I checked the Agilent website, and I assume you did also.  There is no schematic to be had.  What I have discovered 
> with Agilent, is that certain instruments are made by particular divisions.  Some of those divisions consider those 
> schematics to be proprietary and they will not release them now, not in the near future, and may never be released.  I 
> ran across this with an LCR meter I bought on EBAY.  I tried to get schematics, as I thought he repair would be 
> relatively simple.  It passed self test, appeared functional, but very erratic.  I thought the problem would be within 
> the first few components near the front end.
>
> I called the factory more than once, but the line I got was exactly what I described above.  I looked everywhere, but 
> to no avail.  I hope you have better luck than I did.  Maybe you can find a parts unit on EBAY cheap.
>
> Bob
>
>
>
> ----- Original Message ----- 
> From: <jeffhook at comcast.net>
> To: <time-nuts at febo.com>
> Sent: Monday, June 07, 2010 7:26 PM
> Subject: [time-nuts] HP 3458A schematic/service manual request
>
>
>>
>>
>>
>>
>> Hi,
>>
>>
>>
>> I picked up a non-working 3458A at a swapmeet this weekend.
>>
>> It has err "202 Hardware Failure : Slave test-convergance".
>>
>>
>>
>> "Assembly-Level Repair Manual" says its a problem on the A1 board
>>
>>
>>
>> Does anyone have a schematic/service manual for this?
>>
>>
>>
>> Thanks
>>
>> Jeff
>>
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>
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