Author Topic: HP 3312A function generator maintenance  (Read 1652 times)

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Offline dimkasta

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HP 3312A function generator maintenance
« on: February 10, 2017, 02:11:45 pm »
A few years back I bought a used HP3312A

I use it mostly on audio frequencies and have no serious problems with it.

However, the setting knobs are a bit jumpy, so I thought I should do some maintenance work on it.

I have located the service manual
http://literature.cdn.keysight.com/litweb/pdf/03312-90004.pdf?id=734381

I was thinking to try and clean the pots and check any electrolytic caps for aging problems.
Any advice on how I should approach this? Any other things I should check for?

Thanks in advance
 

Offline wn1fju

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Re: HP 3312A function generator maintenance
« Reply #1 on: February 10, 2017, 05:35:43 pm »
Sounds like you are on the right track.  Always consider mechanical issues before electrical.  That is, a careful cleaning/lubrication of all the pots and pushbutton
switches often cures all ills.  I wouldn't think faulty electrolytics would cause your issues as they are probably mostly used in the power supply and faulty ones
would either render the unit completely dysfunctional or cause some massive distortion on your output.  Start with alcohol or a mild cleaner like the Caig Deoxit
products.  Don't expect the unit to work right away after cleaning - it usually takes an hour or two for all the cleaning fluid to dry up.
 

Offline dimkasta

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Re: HP 3312A function generator maintenance
« Reply #2 on: February 10, 2017, 10:38:46 pm »
You got to love engineering that looks nice, tidy and squeeky clean 30 years later :)


 


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