"been there done that..." som man brukar säga
Hittade inga direkta svar bara fler som har samma problem, verkar inte helt ovaligt på denna modell
Letade också på en kille att mejla om fullständiga schemat, får se om han orkar svara. Tack för tipset i alla fall!
Urklipp från sista inlägget gällande just felkod E31 på denna nyhetsgrupp, sista meningen stämmer bra in på mitt problem:
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> Hello Don, I would very much like to hitch up to your wagon. As I said, I
> am pretty sure my Timing (U300) chip is at least partially bad. The other
> two, I believe are functional. I would be willing to lend you the two good
> chips if reverse engineering could be done non-destructively. Enough block
> diagrams exist of their operational and configuration identity, and could be
> confirmed with my good chips. I will donate the U300 to be able to purchase
> a "whatever" you get for a substitution. If there are others on the site who
> are in need....please speak up.
>
> P.S. Don, do you have the circuit diagram for the U300?
>
> Bob Curran
>
>
> --- In
hp_agilent_equipment@yahoogroups.com<hp_agilent_equipment%40yahoogroups.com>,
> Don Bitters <donbitters@...> wrote:
> >
> > The only source for the 3 custom IC's is another 8112A or 8116A. I found
> the patent application for the slope generator chip, and am considering
> fabricating the cusom IC on a 24 pin carrier using SMT components. I have
> been unable to find the cicuit diagrams for the VCO chip. I am wondering if
> the IC's might be found at a surplus house in Germany, since the generators
> were built in Germany. Can any one find any of the suplus buyers in
> Germany? The other option is some one send me 1 or more of the bad chips
> (one of each type) and I will have our lab decap and reverse engineer the
> chips. I will also check with my cal lab guy to see if he has any dead
> bodies. This will also tell us what is failing in these custom IC's. The
> cusom IC's fail on a regular basis and are show stoppers as there are no
> replacements to be found. Might be able to duplicate the function with an
> FPGA- but probably not the footprint. The 3 IC's also have 2
> > different sets of PN's - they are interchangeable by type.
> >
> > Regards,
> > Don Bitters
> >
> > Help with some 8116A Generator problems
> > Posted by: "rwcurranjr@..." rwcurranjr@... rwcurranjr@...
> > Sat Mar 13, 2010 6:53 am (PST)
> >
> >
> > I have been repairing numerous small problems with a 8116A generator. In
> tracking a square wave through the final amplification and attenuation
> sections. I accidentally slipped my probe hold on Q505, and took that and a
> couple of other nearby transistors out. The Q505 is a 2N5160 (PNP) used with
> a matched complement Q506 (2N5109 NPN). The 2N5160 is obsolete. This is not
> my area of expertise, but I have selected NTE129MCP as a (one NTE128 and one
> NTE129, matched) replacement. This is still bothering me. They are not as
> close as I would like. Please, may I have your thoughts or ideas on this
> selection.
> >
> > Additionally, I had the generator working and calibrated for sine,
> triangle and square waves. Except for the PWM not working, I could live with
> this. I do get a start-up E31 error, which is notification of part or all of
> my PWM problem. The limited time spent tracking this error keeps bringing me
> back to the U300 Timing IC (HP custom chip). If this in fact is my
> problem..... does any one know a source?
För att över huvud taget kunna leta reda på något fel känns det som en manual/schema vore bra att ha... Jag har kollat på www.ebaman.com utan framgång, har även sökt på nätet men hittar bara dåligt scannade ej fullständiga dokument.
)
Bra byggkvalitet men tar en del plats på bänken och låter som ett kärkraftsverk 
