Re: My dead A410/1 PSU :-(

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#475

From: Clive Jones
Date: Sun, 04 Oct 1992 23:27

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In article <1992Oct4.161201.224@mnemosyne.cs.du.edu> ggasrren@nyx.cs.du.edu (Glenn Garrett) writes:
>                      Interestingly, my current supply does not have
>-5V and the only side effect of this seems to be that the sound from
>the computer doesn't work! :-( I think a 7660 IC should cure this 
>though if I get time to wire one up.

I expect you'd find the serial port didn't work either. These are the
only two parts of the machine that use -5v.

Personally, I learned my lesson when some inductive effects blew my
BBC Master's PSU, and I subsequently tripped the RCCBs in the lab by
trying to 'scope components under test from mains voltage - fiddling
with power supplies is not that fun. I'd either get a 20-25v
unregulated power supply and put some voltage regulators for the
appropriate levels on the far side, or, better, just buy a proper
replacement PSU - it's what I did.

--Clive.

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From: crj10@phx.cam.ac.uk (Clive Jones)
Newsgroups: comp.sys.acorn.tech
Subject: Re: My dead A410/1 PSU :-(
Message-ID: <1992Oct4.232711.20784@infodev.cam.ac.uk>
Date: 4 Oct 92 23:27:11 GMT
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