Hi Paul
? ? ? ? ? ?Thanks for the kind reply. The 200 could be the CPU or the bulkhead.?
As there's not much in the bulkhead and it kinda faded out its most likely the
Ethernet chip on the CPU board.
The 500 is probably the PSU. As with many SMPS its trying to start up and failing.?
Anything that's a closed loop control system ain't easy.
I don't fancy trying to fix it as its tightly packed and full of nasty voltages.
If I remember rightly those PSU's needed a test rig that simulated the loads. ?
No hurry but if you do come across either item I'd be interested.
?I'll be in Germany from next week on. Back around July 2nd
Regards
Rod
________________________________
From: Paul Anderson <useddec at gmail.com>
To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
Sent: Wednesday, 11 June 2014, 19:39
Subject: Re: Looking for VAX spares
Hi Rod,
I have a few 4000s here and some spares, but it might take a few days.
Paul
On Wed, Jun 11, 2014 at 5:45 AM, R SMALLWOOD <rodsmallwood52 at btinternet.com>
wrote:
Hi
? ? My two biggest VAXes have both developed problems.
The 4000-200 no longer talks to the network? and the 4000-500 has a PSU
problem.
I'm looking for the following:
1.? KA660 CPU card and Bulkhead for a VAX 4000-200
2? An H7874-00 plug in PSU for a VAX 4000-500
I have a reasonable stock of DEC disks and boards so a swap might be on.
Rod Smallwood