25 Mar
2011
25 Mar
'11
4:22 p.m.
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-
bounces at classiccmp.org] On Behalf Of Richard
Sent: 18 March 2011 02:56
To: cctalk
Subject: Re: MicroVAX 3100 Model 95 Damaging SIMMs?
In article <008301cbe4f8$36678f50$a336adf0$(a)ntlworld.com>om>,
"Rob Jarratt" <robert.jarratt at ntlworld.com> writes:
I have just been checking the outputs from the PSU and was wondering how
"good" they are. Here is what I measured:
On the standard Molex connector the 5V output is around 5.3V, the 12V output
is pretty much dead on. On the CPU power connector I measured these
voltages:
5.0V
5.3V
5.3V
-12.46V
-5.98V
5.31V
12.04V
5.31V
I am not sure what the nominal voltages are supposed to be on this connector
(the -5.98 looks a bit suspicious) and how much out of tolerance they are.
How do these voltages look?
Regards
Rob
No I have not, sounds like that is my next step,
although I don't
think I have the equipment to check if the PSU is operating to spec, I
can visually check components.
Supply voltages can be checked with a simple voltmeter. With dummy
resistor loads on the PSU you can check current supplied by measuring the
voltage across the resistor load.
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