Author Topic: HP 1720A SCHEMATIC 20 MISSING FROM MANUAL AND POWER ON ISSUE ADVICE  (Read 286 times)

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Offline Tacoman1234Topic starter

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Good afternoon all you smart fellers, I recently got at an estate sale tons of old electronic equipment. Among the mound was a hp 1720A oscilloscope. I have narrowed down the problem to the power board. Reading the manual the +15v seems to be the reference voltage for everything in this oscilloscope. The schematic for that circuit Is number 20 and my manual is missing the page. Does anyone have a picture of that page? I have read the theory page in the owners manual and I could possible look at the board once removed and trace it out but it would be alot easier with the Schematic. Thank you for any help
 

Offline factory

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Re: HP 1720A SCHEMATIC 20 MISSING FROM MANUAL AND POWER ON ISSUE ADVICE
« Reply #1 on: September 11, 2024, 12:44:09 pm »
Have a look for the pdf manuals of the 1715A or 1725A, the 1715A uses a PSU board marked 01720, HP often used the same boards for more than one model, except for a few model specific boards.

Some 1715A circuits here; https://www.vintage-radio.net/forum/showpost.php?p=946446&postcount=33

David
« Last Edit: September 11, 2024, 12:50:55 pm by factory »
 


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