Emax

I'm located in Atlanta.  Yeah, I did everything in those steps but put in pin A thinking that it was to supply the voltage to that trace on the LED board.  Ooops :(  I did end up getting the Emax to "kinda" boot and hang today, rather than not at all earlier, after remembering it needed to have the keyboard connectors hooked up to get power to all boards and such.  So, it IS trying to do something but still no screen.  I am praying that I just damaged the screen and a new one will do the trick.

Jason, did you not have to install that other resistor and or potentiometer that Ted speaks of?  I ordered one more newhaven screen and some new header pins from mouser today to give it one more shot before sending it off to Ted or selling the guts straight up.  I'd really like to get it going but I don't have a whole lot of time to get caught up in tech when I can rather be playing or creating music.  I think the reason why I'm a bit flustered is that I've done a lot of other repairs like sliders, batteries, keys, trace repairs, etc on various other synths with a 100% success rate but with the Emax I got a bit in over my head.  Ted, I will have to wait to send you this till May most likely since I'm waiting on more parts to come in next week.


--- In emax@yahoogroups.com, Jason Mc <jasonmcdougal@...> wrote:
>
> The one thing I have learned about electronics is patients and attention to
> details.
> I hope i can help you out. I'm not a professional, I do these repairs as a
> hobby in my spare time. Restoring my Emax is worth it, something about the
> 80's sound that comes from these i really love. What I did was the
> following:
> 1) Remove all the original header pins from the old display
> 2) Remove the El Foil "Inverter" (small black box) from the CPU board
> 3) Install old header pins 1-14 into new Led display (On the new display
> there will be two empty pins 15,16 that remain empty)
> 4) Install only header pin K, DO-NOT install header pin A
> 5) Remove surface mount resistor R7 and solder it in the R8 location (this
> pulls 5v from another line)
> 
> Did you remove the "inverter" before you tried it for the first time?
> If pin A was installed and the "inverter" was still in place you probably
> fried the new lcd screen.
> On my setup pin A is removed and resistor R7 is swapped with R8, this is the
> only way it works.
> If you don't Swap the resistor on the new Display, the LED gets too much
> current and the Display runs hot (not good)
> However with the resistor swap the new display is getting the correct
> voltage and current.
> Is your Emax the Keyboard version?
> 
> Whatever you do don't throw the Emax overboard! My GUESS is that you just
> fried the new display.
> Get another  Newhaven NHD-0216EZ-FL-YBW and try it again
> 
> Like Ted said, without a working display the Emax will not boot. I listen to
> Ted his advice on all things Emax is always welcome.
> 
> Where are you located I'm in the SanFrancisco Bay Area?
> 
> 
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>