Re: Pet64 DOA

On 12/8/2010 9:15 PM, Philip Lord wrote:
> I just got myself a PET64 from Yahoo Auction Japan. Quite a rare 
> machine I hear, so I'm not sure how one ended up in Japan. I got if 
> for a decent price as I don't think the Japanese knew exactly what it 
> was.
>
> Anyway, It arrived the other day, after a quick internal inspection, I 
> powered it on. I can hear the transformer buzzing(!), but no action at 
> all on the screen at all, and it doesn't seem like the chips are 
> getting warm at all Maybe need to leave it on a little longer to make 
> sure, but I didn't want to do that incase bad voltages kill anything 
> more).
>
> There are 4 wires leading from the small PCB which is attached to the 
> transformer to the C64 motherboard, and I have measured the voltage 
> from the black wire (GND?) to the 3 others. Here are the reading i get:
>
> White: - 100mv
> (KEY)
> White - 100mv
> Black (I'm guessing this is ground)
> Red - 4.98v
>
> That's as far as I have gotten. Next I will remove the motherboard and 
> see where exactly these 4 wires go.
> Anyway, I was just wondering if anyone had any insights or thoughts.
>
> Cheers
> Phil
>
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I believe your white wires should be 9VAC, so I would remeasure in case 
you used a meter on DC setting.

-
Pete Rittwage
C64 Preservation Project
http://c64preservation.com


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