Re: Pet64 DOA

From: Philip Lord <>
Date: Fri, 15 Apr 2011 08:30:20 +0900
Message-id: <>
Hi Ethan,
Yes, it was quite enjoyable bringing this machine back to life. Admittedly Ray Carlsen did most of the hard work.

FIxing the monitor was very rewarding indeed. I've never worked on a monitor before. Considering the scary high voltages involved and my lack of knowledge fixing analog circuits, I was skeptical that I'd get it working.


On Apr 15, 2011, at 2:18 AM, Ethan Dicks wrote:

> On Thu, Apr 14, 2011 at 12:24 PM, Philip Lord <> wrote:
>> This is just a FYI follow up.
>> The machine is now working 100%. You can read about the fix here:
> Hooray!
> I'm not surprised about the PLA and the RAM... in that order, they are
> the most common things to fail.  A bad CIA is also not all that rare
> (because of ESD to the User and Joystick ports).  All that *plus* ROMs
> - that's a bit much for one board, but hardly unheard of unless the
> PSU flakes out and jolts everything.
> Good to hear the monitor fix was simple once the symptoms were fully
> understood.  I've never had to repair the CRT control board in a PET,
> but since it's not a readily available part, repair is more of an
> option than replacing.
> I've only ever seen a couple of PET64s ever, so it's wonderful to see
> one brought back from the brink.
> -ethan
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Received on 2011-04-15 00:00:12

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