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HP8568B ?

Question asked by k.haber on Mar 19, 2008
Latest reply on Apr 1, 2008 by k.haber

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Hi,

I have a little problem with the manuals. I hope anybody can help:

In the HP8566B-8568BRepair.pdf manual the documented pcbs
does not all match with the pcbs which are assembled in my analyser.

For instance:
The A5A1 Board have the manual number 85680-60210 but assembled is the 85680-60019.
The A12 Board have the manual number 85680-60211 but assembled is the 85680-60181.

For effective repairing, it will be a great pleasure for me, if anybody can inform me, how I can get the right documentation .

regards

Klaus Haber

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8 Replies

jborges3 Mar 19, 2008 3:34 PM
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Hello Klaus ,

8568B has been out of support for some time, so I don't have much info about it.

Can you please share with me the part number and print date of the repair manual you have? If so I may be able to find an older version in our manual archive that may have the info you need.

Best regards,
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k.haber Mar 20, 2008 1:23 AM
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Hi,

Thanks for your quick answer.

The manual I am using has following header:
Title & Document Type: 8566B/8568B Spectrum Analyzer Troubleshooting and Repair Manual
Manual Part Number: 08566-90042
Revision Date: December 1984

The analyzer have Snr. 3217A05612 - 85680B 001

Thanks for helping me, Regards Klaus
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jborges3 Mar 20, 2008 5:10 PM
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Hi Klaus,

That isn't the correct title for that part number. The manual part number you listed, 08566-90042, is the 8566B manual, but it is NOT the 8568B manual.

Many of the parts are different and the manuals are not interchangeable. I got some help from a knowledgeable co-worker who tells me that the latest 8568B Troubleshooting and Repair Manual is part number 85680-90137.

Looking in our dusty archive we found an copy of this manual and we saw that the correct part numbers for the board assemblies are indeed the part numbers you read off the actual board assemblies.

The correct part number for the A5A1 Keyboard is 85680-60019.
The correct part number for the A12 RF interface is 85680-60181.

85680-60210 is actually the part number for the A9 Board assembly, Pilot 2nd IF Amp, I think you will see that the part number in your 8566B manual is actually 85660-60210 if you double check it.

85680-60211 is actually the part number for the 8568B A10 Board assembly, Pilot 3rd converter 2nd IF Amp. I think you will see that the part number in your 8566B manual is actually 85660-60211 if you double check it.

85680-90137 is the manual you want. Unfortunately it is out of print and Agilent doesn't have any more copies. You may be able to find a copy somewhere if you look and if you are lucky. Maybe another member of this forum knows where you could get an old copy, but unfortunately the replacement parts listed in that manual are no longer available anyway.

Good luck and best regards,
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k.haber Mar 21, 2008 12:36 AM
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Hi,

Thanks for your answer and the information.
Its a little confusing for me - In the 08566-90042 manual header stands 8566B/8568B spectrum analyzer troubleshooting and Repair Manual.

If anybody can help me with a copy of the "HP 85680B RF Section Troubleshooting and Repair Manual - HP part number 85680-90137" I will be very gratefully for this helping.

Thank, Regards
Klaus Haber
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jborges3 Mar 21, 2008 11:34 AM
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Hi Klaus,

I looked at the online version of this manual and I can see why it may be confusing. The description of the document and the errata header both show model number 8568B.

It was because 8566B and 8568B both had essentially the same Display/IF section and so they both used that same Display/IF section of the repair guide. (meaning that the Display/IF was volume two of the manual and volume two for 8566B was the same as volume 2 for the 8568B)

The RF sections are different, and each had separate repair manuals.

So, 08566-90042 contained the volume 1 8566B RF section information and the volume 2 8566B/8568B IF Section information.

The piece that you require is the volume 1 8568B RF section. This manual had the part number 08568-90043 back in 1984 (when your manual was written) and most recently was revised as 85680-90137 back in 1991. Unfortunately this manual has been out of print since 2002 and all of the parts in it are no longer available.

Its a good analyzer, I wish you the best of luck in making your repairs.

Best regards,
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k.haber Mar 26, 2008 2:31 AM
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Hi Joseph,

Thanks for your information. I have now successfully repaired the instrument. After 6 hours searching, I found the problem in two connectors which one combine the controller with the interface board. After replacing this connectors (the contact element will be bad and I found replacements by an local distributor) the analyzer works. And as soon as you say â€œIts a good analyzerâ€.

Best Regards
Klaus Haber
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JohnMiles Mar 28, 2008 3:52 PM
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FYI, I believe that Artek Media (http://www.artekmedia.com) has just finished scanning both the 8568A and 8568B RF section manuals. You can email him at manuals@artekmedia.com to ask about the status. Most of their manual .PDFs sell for about US $10 to US $20 each, and can be delivered via FTP.
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k.haber Apr 1, 2008 6:16 AM
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Hi John,

Thanks for the nice information.
ArtekMedia has the document I need.

Thanks for helping me, Regards
Klaus Haber
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