How to determine a Powersupply pinout
Uriah
input from the powersupply. I don't have this particular PS. How
would I go about figuring out the powersupply requirements and pinouts
that need to go into this 5 pin DIN. They company is long gone and I
can't find anyone else who has one. It is a International Test Systems
2000S. Circuit Test.
Thanks
Russ
Homer J Simpson
"Uriah" <uria...@hotmail.com> wrote in message
news:1161408627.0...@b28g2000cwb.googlegroups.com...
I would try to figure out that part of the circuit and determine the
voltages from that. First, figure out the ground or common pins.
Chris
There's no standard pinout. These 5-pin DIN power connectors more
often than not had +5V, +/-12V and GND, but no guarantees.
You could do a lot worse than starting with Mr. Simpson's advice. Just
open the case and look on the circuit board itself, and poke around
with an ohmmeter on the 20K range. Even if the power supply voltages
aren't silkscreened onto the board, you can make some easy assumptions.
For instance, if you see a 16-pin 74XX IC, you've got GND and one of
the power supply voltages right there. The pinout of an op amp will
probably tell you the analog V+ and V-. Be sure to trace back to the
connector before plugging anything in -- there may be voltage
regulators on board that are regulating the power supplies.
If you've got a little time and patience, you might want to use eBay to
find prior sellers of this piece of equipment. They may have more
information to help you, or even may have scanned a manual which may
have the information there.
You also might want to try posting at sci.electronics.equipment.
Good luck
Chris
Michael Black
> Uriah wrote:
>> I have an old piece of test equipment that uses a 5 pin DIN plug as the
>> input from the powersupply. I don't have this particular PS. How
>> would I go about figuring out the powersupply requirements and pinouts
>> that need to go into this 5 pin DIN. They company is long gone and I
>> can't find anyone else who has one. It is a International Test Systems
>> 2000S. Circuit Test.
>>
>> Thanks
>> Russ
>
> There's no standard pinout. These 5-pin DIN power connectors more
> often than not had +5V, +/-12V and GND, but no guarantees.
>
> You could do a lot worse than starting with Mr. Simpson's advice. Just
> open the case and look on the circuit board itself, and poke around
> with an ohmmeter on the 20K range. Even if the power supply voltages
> aren't silkscreened onto the board, you can make some easy assumptions.
> For instance, if you see a 16-pin 74XX IC, you've got GND and one of
> the power supply voltages right there. The pinout of an op amp will
> probably tell you the analog V+ and V-. Be sure to trace back to the
> connector before plugging anything in -- there may be voltage
> regulators on board that are regulating the power supplies.
>
feel like spelling out at the time.
ONe thought that occurred to me is that the AC adaptor could be AC output.
In which case, one is likely looking for a bridge rectifier connected
to the connector.
In that case, there'd be no continuity between the connector and the
supply voltages of the IC. Likewise if regulation was on the board,
there's be no continuity between the connector and IC power pins,
since the voltage would go through a regulator.
The board should reveal enough information (unless someone's potted
it or rubbed off all the IC numbers). But of course, being able
to read that information depends on who is doing it. What's obvious
for someone who's been around electronics for decades is not so
obvious for someone who may be looking for the first time.
Michael
Uriah
waited a few years to get one of these.. They are really rare. I
notice on ebay you can't really search that far back on completed
auctions. Is there any way around this? I used to be able to go back
a year or two and see what items sold for but now it only goes back
about a month. Here is the link to the unit I just bought.
I have never seen a manual for it and few people own one. I
appreciate the help.
Thanks
Russ
Chris
Hi, Russ. Sorry for your troubles. Don't give up yet, though. As I
said, you just might hit paydirt if you post your query over at
sci.electronics.equipment. That would be my first choice -- it's free,
and someone might be able to give you a hand.
I can't see actually using this piece of test equipment without the
manuial (and software?). You also could make some inquiries from the
eBay seller, and ask if he could get you in touch with the prior owner.
With a little encouragement, the prior owner might be inclined to look
around in the file cabinets for the manual.
Apart from that, there are a few vendors of old manuals. You'll have
to pay for the privilege, but sometimes the additional cost is just
part of the deal. I won't purchase any piece of used test equipment
more complicated than a handheld DMM without having the manual, and I
usually can get it from one of these sources if it doesn't come with
the instrument:
http://www.sphere.bc.ca/test/manuals.html (bottom half of the page)
I like Manuals Plus as a first try. I've also heard great things about
Ed Matsuda, although I haven't bought from him myself.
Even if the vendors don't list the manual on their website, they may
have it. You can notify them of your requirement, and they'll keep an
eye out for you.
Good luck
Chris
ehsjr
CircuiTest 2000S/2100 - Advanced Testing Software Equipment for the
Global Electronics Industry
IndustrialPartner.com
301 S Sherman Street
Richardson, Texas 75081
United States
1-972-234-4343
in...@industrialpartner.com
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Good luck!
Ed