On Tue, 28 Jul 2009, Philip Lord wrote:

> Hi everyone,
> I was hoping someone here would be able to help me. I hear you are a 
> technical bunch.
>
> I have a dead PET 2001B (320081). When I first got it, it was blowing fuses, 
> I took the transformer are apart, and cleaned everything inside (lots of dust 
> and grime), and re-assembled. Now It's not blowing fuses anymore (not sure 
> why not), however the machine is still dead. The first thing I want to 
> confirm what power is getting to the motherboard. I was wondering is anyone 
> here knows both the AC voltages coming off the transformer (from memory I 
> believe there are 5 tabs, not including the two lines from the mains power), 
> and the voltages at the J8 power plug on the motherboard? I have looked on 
> the net but have not been able to find this simple information. I think

I pulled out my 2001 and took some measurememts.  On connector J8 the 
center wire is ground. Measuring from the various pins to ground.

Pin 1 - 8V
pin 2 - 20V
pin 4 - 20V
pin 5 - 8V

Measuring between the two wires on the transformer that go to the video 
board - 16V.


wlevak@sdf.lonestar.org
SDF Public Access UNIX System - http://sdf.lonestar.org

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