emulatorII-list

Hi Everyone -

Okay, here's an update - see if anyone has any ideas.

I've checked out the PSU and found that Q103 (the big 2N6545 Transistor) 
appears to be shorted out in every way - no resistance between any two 
pins when out of the circuit.  I don't have a replacement here - only a 
2N3055, which looks like it is rated at way too low of a voltage, if I'm 
not mistaken.

So, I then (Leaving Q103 out of the circuit) checked the voltade after 
the 4 big filter caps and found about +318V with about 60mA of AC 
ripple.  Does this sound about right at that point?

I'm trying to confirm that things look right before the transformer,

Thanks,

Tim


modularmoog wrote:

> Is anyone here intimately familiar with the EII power supply?
>
> My experience with switching power supplies is limited, so I have a
> few questions.
>
> I got a copy of the schematics, and it looks to me as though basically
> the main transformer has a primary located at pins 9 and 10 - is this
> correct?  Right now I seem to be getting pretty much no voltage to
> that point.  (Needless to say there are NO outputs at any of the voltages)
>
> Can anyone confirm for me that this is indeed the case and what kind
> of voltage I should expect to see there?
>
> It would help a lot to track down the problem.
>
> Thanks!
>
> Tim
>
>
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