Emax

Using a pc power supply can certainly be done. Yesterday my Emax's 
power supply decided to burn one of the capacitors with hefty amount 
of smoke coming out of Emax. I was able to power off the supply 
before nothing more serious happened.

Anyway, I used a standard ATX power supply to test that the power 
supply didn't damage other components. First I made a custom 
connector for Emax. The pinout starting at pin 1 (in the CPU board) 
is like:

P1: -
P2: -
P3: -
P4: -
P5: -
P6: +5V
P7: COM
P8: +12V
P9: -12V
P10:-
P11: +5
P12: COM
P13: +12V
P14: -12V

You can use a standard Molex power connector for the hard disk if you 
have a HD model. My Emax ran ok with ATX power supply but for 
permanent use I can see powering on the power supply a bit 
problematic as an ATX power supply needs pin 14 (in atx power 
connector) to be short circuitted to start. I assume AT power supply 
for example would be a better choice because of this.

I still would like to repair my original power supply. I'd be glad to 
know if anyone has a schematic for it. My power supply looks a bit 
different from Chejus (in the group photo section) and it has a model 
number C50-31E in the sticker. Did Emax's have different power 
supplies or revisions? Any suggestions?

Regards,
Kari

--- In emax@yahoogroups.com, ted Summers <djtbs1@...> wrote:
>
> I know people have talked about it on this board. And have used a  
> standard small form factor pc power supply. So can any of you that  
> have done this share with the group the model, and what you did to  
> modify it?
> 
> 
> Isn't that what this group is about?
> 
> I can theorize what could be done. But I don't know what has been  
> done in "the real world" and has held up.....
> 
> 
> Remember - esynthesist (props to you!) came through for everyone 
on  
> the software side. Who wants the notoriety on the hardware side :-).
> If you've already done it, it is not like the group is asking you 
to  
> take on something completely new or break your emax.
> 
> Regards,
> Ted
> 
> On Jun 27, 2007, at 6:45 AM, MFMouseQuake wrote:
> 
> > Me Too!!!
> > My PSU is gone and I need on BAD!!! This machine is my secret  
> > weapon. Does anyone know where to get one or a place that can fix 
it.
> >
> > May Peace Be Unto You, Always
> > MouseQuake
> >
> > ----- Original Message ----
> > From: sam goose <sam_goose_266@...>
> > To: emax@yahoogroups.com
> > Sent: Monday, June 18, 2007 8:10:14 AM
> > Subject: RE: [emax] Emax power supply replacement
> >
> > There must be a way to use a different power supply to the emax.
> >
> > This issue must not be ignored, PSU faliure affects us all!
> >
> > >From: "Simon_Owen" <iss049@bangor. ac.uk>
> > >Reply-To: emax@yahoogroups. com
> > >To: emax@yahoogroups. com
> > >Subject: [emax] Emax power supply replacement
> > >Date: Mon, 18 Jun 2007 09:03:23 -0000
> > >
> > >Hi folks
> > >
> > >Well, it's finally been confirmed, the PSU in my Emax is toast. 
It's
> > >been at the repair shop for a week or so and it's come back as
> > >unrepairable. So.. anyone have any suggestions?
> > >
> > >Looking around on the web i came across this site
> > >http://www.retrosyn th.com/gear/ emax/info. html
> > >
> > >Which seems to suggest that a Kepco/Memorex Power Supply 5V@5A 
12V@2A
> > >-12V@..., would be suitable. Does anyone have any experience with
> > >this unit, if it is at all obtainable or not.
> > >
> > >Any ideas at this point would be welcome. Perhaps i should just 
stick
> > >it on ebay as a spares or repair.
> > >
> > >Thanks in advance.
> > >
> > >Simon
> > >
> >
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> 
> 
> 
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>