EEVblog Electronics Community Forum

Electronics => Beginners => Topic started by: hnjmkl on January 26, 2022, 09:09:02 pm

Title: HP 3325A power supply cal
Post by: hnjmkl on January 26, 2022, 09:09:02 pm
Service manual downloaded from Agilent is missing page. 5-2 related to power supply calibration, I ask if anyone has it available.
Title: Re: HP 3325A power supply cal
Post by: wn1fju on January 26, 2022, 11:02:14 pm
You might try downloading the HP 3325B service manual.  That has the missing page, although the potentiometer numbering might be slightly different between the A and B models.  Between the 3325's procedure description and the 3325A's schematics, you should be able to figure out what to do. 

If I remember, the power supply is adjusted with one pot to -15V as measured at a test point.
Title: Re: HP 3325A power supply cal
Post by: SilverSolder on January 26, 2022, 11:20:00 pm

I recommend purchasing the superbly scanned manual from Artek Media.  It is only around $10 or so.   All the Artek manuals seem to be super high quality scans - much better than the stuff on the Keysight web site.
Title: Re: HP 3325A power supply cal
Post by: hnjmkl on January 28, 2022, 08:09:36 am
Unfortunately it seems that Artek has only the operational and not the 3325A service available
Title: Re: HP 3325A power supply cal
Post by: SilverSolder on January 28, 2022, 08:28:56 pm
Unfortunately it seems that Artek has only the operational and not the 3325A service available


The manual is entitled "Operating and Service Manual" - it contains everything, including diagrams, troubleshooting steps, etc.
Title: Re: HP 3325A power supply cal
Post by: hnjmkl on January 29, 2022, 05:51:20 am
the search in artekmanuals appears downloadable only operational $ 7.50, the service cod. 90002 not purchasable, I asked for clarification directly to the site, let's see what they answer.
Title: Re: HP 3325A power supply cal
Post by: hnjmkl on January 29, 2022, 09:56:53 am
Problem solved, downloaded full $ 7.50 pdf