3 Jan
2014
3 Jan
'14
4:31 p.m.
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-
bounces at classiccmp.org] On Behalf Of Glen Slick
Sent: 03 January 2014 21:12
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: No Console on MicroVAX 2000 if Disk Not Plugged In
On Fri, Jan 3, 2014 at 12:56 PM, Robert Jarratt
<robert.jarratt at
ntlworld.com>
wrote:
Thanks, I hadn't read the whole manual and missed that bit.
Regards
Rob
I thought that the system board and the fans would present enough load
for the
PSU, but it seems not, I needed the disk to be powered for enough
current to be drawn to make the PSU work.
Regards
Rob
http://www.bitsavers.org/pdf/dec/vax/410/EK-VTTAA-TM-
001_VS2000_TechRef_Jul87.pdf
Chapter 6
Resistor Load Module
The system box must use a resistor load module when less than two drives
are installed. The resistor load module regulates the power supply in the
expansion boxes when only one drive is installed in each box. The power
supply needs a minimum amount of current drawn for it to regulated
properly...