Perq 2T1 display fault

From: Jules Richardson <>
Date: Thu Feb 19 17:30:30 2004

On Thu, 2004-02-19 at 21:50, Tony Duell wrote:
> I will have to dig out the
> schematics sometime (yes I have the full manuals...)

I thought if anyone had details on them it'd be you :-)

(Aside - does PERQ stand for something, or was it originally all
capitals just as a trendy marketing thing?)

> I would start, though, by checking the 55V line from the PERQ's PSU to
> the monitor. If that's low or noisy, you'll have all sorts of problems...

Rats, I did last weekend and it didn't seem *too* low but I haven't got
the exact figure with me at the mo. I believe it was sitting at 50V or
so, just checked on a meter though and not a scope. The LS logic chip in
it was getting a healthy 5V too. I'll give it a quick (and careful) poke
with a 'scope at the weekend.

Then I think I'll pull the fuses out of it and lock the HD so nobody
fiddles with it and breaks it before the display can be sorted :)

(does appropriate media exist out in the public domain to rebuild the
hard disk contents if needs be? Of course finding a replacement drive if
that breaks is another matter entirely)


Received on Thu Feb 19 2004 - 17:30:30 GMT

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