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: a...@ardiehl.de
To: General@lnx.armin.d; lnx.armin.d:On-Topic and Off-Topic Posts
cctalk@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
a...@ardiehl.de
