Linear Power Supply (Conversion Equipment Corp) from a basic four 510

[dwight]

I'm not even sure what the machine is. Can you give
a little more information on what it is?
Dwight

 
> Subject: Re: Linear Power Supply (Conversion Equipment Corp) from a basic four 510
> To: cctech at classiccmp.org
> From: ad at ardiehl.de
> Date: Mon, 13 Jul 2015 18:28:56 +0200
> 
> Thanks, yes you are right. And it is fixed now. Would have been more 
> easy with the schematics on hand.
> 
> But the 510 does not seem to start, may be the mini test program i have 
> (to boot from terminal) only works with the model 210 and not with the 
> 510. (http://basicfour.de/cpu/small/index.html)
> 
> Would really like to have the cpu documentation, than it may be possible 
> to write some test code. (1300 CPU Technical Manual and/or M1300 Series 
> CPU Organisation and Description Reference Manual)
> 
> 
> 
> 
> On 07/10/2015 08:19 PM, dwight wrote:
> >
> >> Date: Fri, 10 Jul 2015 11:03:14 +0200
> >> From: ad at ardiehl.de
> >> To: General at lnx.armin.d; lnx.armin.d:On-Topic and Off-Topic Posts cctalk at classiccmp.org
> >> Subject: Linear Power Supply (Conversion Equipment Corp) from a basic four 510
> >>
> >> The one from my 510 does not supply the main +5V, all the other voltages
> >> are present. Does someone have a schematic for that one, would me more
> >> easy.
> >> I have uploaded pictures here: http://basicfour.de/mai510-PSU/small/
> >>
> >> Thanks a lot
> >>
> >> Armin
> > Linear supplies are the easiest to fix. Most of the circuits use 723 that
> > are straight forward regulators. The MC3302 ( LM339 ) is most likely
> > an over voltage detector or such.
> > Get a data sheet for the 723 and I suspect you'll be able to trouble
> > shoot with just that and no actual schematic. I think places like Jamco
> > still have these chips.
> > Locate the one used for the +5 and measure the voltages on
> > the pins. It will most likely tell you the issue.
> > Dwight
> >
> >
> >   		 	   		
> 
> 
> -- 
> 
> ----------------
> Grüsse
> Armin Diehl
> ad at ardiehl.de
>