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Korg Poly800/EX800 Users

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Message

Re: can someone tell me how IC1 is numbered?

2005-01-13 by hockinfinger@yahoo.com

I'll agree that you might want to provide some way of isolating your 
input for the protection of this IC.

It's hard to tell from the photo, since the max resolution I can view 
it is 400x400. I think you have it correct. If the end of the IC with 
the semicircular "notch" is up, then the first pin to its left is pin 
1, then the pins are numbered sequentially counterclockwise.

Good luck

Marty



--- In korgpolyex@yahoogroups.com, russ <russdaren@y...> wrote:
> your probably going to want to do moare than just wire a lead to it 
and put a potentiometer on it. You probably want to think about 
getting the impedance right for an input. Also a decoupling capacitor 
or transformer can help too. IMHO that wiring an input stright to the 
chip that was never meant to see an outside elctricl signal might 
just end up damaging the chip from plugging and unplugging the cable 
to other devices. 
> 
> theagreemen <theagreemen@y...> wrote:
> this is about adding a input to the poly800
> 
> I just was hoping someone would bounce some info back to me.  how 
is 
> an IC numbered. i have uploaded a picture of IC1 named NMJ2069.jpg 
> with how i think its numbered. if someone could tell me if i was 
> right or wrong. that would be great.  just kinda wanted some 
> feedback before i started cutting wires.  anyway...i was also 
> thinking for the input i would need to put in a pot to limit signal 
> coming in. any ideas?
> 
> 
> 
> 
> 
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