[volt-nuts] HP3468A

[Artekmedia]

Earlier posters suggestions to replace the RAM battery and to check the 
power supplies for proper voltage and ripple is ALWAYS the 1st place to 
start with this old gear (even if it is working!)

There is a group on yahoo dedicated to fixing and maintaining older HP gear

hp_agilent_equipment at yahoogroups.com

Lots of retired HP engineers  quite possibly the guys who designed the 
3486A even hang out there

Dave
NR1DX


On 8/27/2011 10:48 PM, Bob Smither wrote:
> Dear All,
>
> Not sure where else to ask this question - I am hoping that a fellow 
> volt-nut has experience with the 3468A.
>
> I have an EBay special, known bad when I got it, HP3468A.  When 
> powered on it simply cycles through what looks like a test (all / most 
> elements of the lcd display turn on) and an Overload indication.
>
> I have followed the repair manual as far as I can, but since the unit 
> never stabilizes - the processor is continually interrupted and the 
> cycle repeats - I have not really found anything.
>
> The 3468A uses a 3 volt battery backed up RAM.  The 3 volt lithium 
> cell reads ~ 1.5 volts so clearly the RAM contents are gone.
>
> Could there be something in the RAM that when not present forces the 
> processor to reset?
>
> If it is possible that the missing RAM information is causing the 
> continuous run / rest cycle, any idea how I could I restore the RAM 
> contents?
>
> Thanks for any pointers!
>
> Best regards,
>
>
> _______________________________________________
> volt-nuts mailing list -- volt-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
> and follow the instructions there.

-- 
Dave&  Lynn Henderson
Manuals at ArtekMedia.com
www.Artekmedia.com
PO Box 175
Welch,MN 55089