Otrona Attache power supply woes...
tonym at compusource.net
Tue Sep 23 02:56:41 CDT 2008
>----- Original Message -----
>From: "Josh Dersch" <derschjo at msu.edu>
>To: "General Discussion: On-Topic and Off-Topic Posts"
><cctalk at classiccmp.org>
>Sent: Sunday, September 21, 2008 1:47 AM
>Subject: Re: Otrona Attache power supply woes...
> dwight elvey wrote:
>> Hi Josh
>> Can you take some more voltage readings.
>> It would be good to see Pin 4 and Pin 9 of U4. In fact, it would
>> be good to see a repeat of all the pins of U4 again.
>> Can you also take readings of the pins on U5 as well.
>> This will help quite a bit on trying to understand what
>> is causing the failure.
> 1 - 0V
> 2 - 2.40V
> 3 - 0V
> 4 - 0V
> 5 - oscillating
> 8 - 7.91V
> 9 - 4.43V
> 10 - 2.5V
> 11 - 6.70V
> 12 - 7.92V
> 13 - 5.03V
> 14 - 5.0V
> 15 - 5.0V
> 1 - 6.31V
> 2 - 0V
> 3 - 2.15V
> 4 - 7.92V
> 5 - 5.05V
> 6 - 0V
> 7 - 6.61V
> 8 - 0V
> 9 - 0V
> 10 - 0V
> 12 - 0V
> 13 - 0V
> 14 - 0V
> Actually, these values look better than they did before, I guess I was
> mistaken in my earlier response. I'm still getting nothing at the power
> supply outputs, however. Any ideas?
Josh - how about I send you a power supply, and if it works, we'll discuss
price - I'd rather you try it first...
I have (2) dead Attache's, stripped apart. Can't get 'em to do anything. 2
different rev motherboards, as well.
Power supplies both light up, and they do have voltages present at the pins,
as I went through that with the
tech manual/schematics early in the year, but gave up. Too many machines,
not enough time, not enough focus :)
Let me know if it piques your interest. If i can't get either of mine going,
I'd rather it assist in someone else getting
theirs going... PSU SHOULD fit into a USPS priority mail flat-rate box, but
I'd have to get it off the shelf to actually look.
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