Discussion about the Korg PolySix synthesizer

Thank you for this quick response, guys.

I vaguely remember the technician mentioning this red goo being insulation, I'm 99% certain that that's the case.

Do you still want me to take those close-up pictures?

Oh, and about sending you the board, as much as I wish to, I sincerely doubt that it would be possible because I believe you're in the United States and I'm in Serbia.



--- In PolySix@yahoogroups.com, "Andrew Jury" <andy@...> wrote:
>
> Ha! That's why I wanted a larger picture as I couldn't make it out. You have
> to admit it does look like the pin 1 dot at the wrong end, but this would
> mean the screen printing on the chip is on upside down! Otherwise it might
> be just a fleck of round dirt. I have to say I though the whole repair was
> untidy and looking like it might fall to bits down the line some time. I now
> routinely change the mask ROM holder when I get one in because all sorts of
> nasties can get underneath without otherwise being spotted. 
> 
>  
> 
> Anyway, where were we. Yes, if the IC is polarised right the battery holder
> arrangement might be causing a partial short. Any anyway, what IS that red
> goo underneath, I wonder!?
> 
>  
> 
> Let us know Milan, if you are reading this!
> 
>  
> 
> Andy
> 
>  
> 
> From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
> Chromatest J. Pantsmaker
> Sent: 18 March 2009 17:29
> To: PolySix@yahoogroups.com
> Subject: Re: [PolySix] Re: Having problems after battery replacement
> 
>  
> 
> After staring at it for a minute, it looks like the SRAM IC is in
> correct to me. I can vaguely make out a "pin-one" notch at the end of
> the IC towards the bottom of the picture.
> 
> On Wed, Mar 18, 2009 at 3:49 AM, Andrew Jury <andy@...
> <mailto:andy%40networkjabber.com> > wrote:
> > Hi Milan,
> 
> > One big observation is that it looks like the SRAM IC is in back to front!
> > There is usually a dot marking pin 1 of the device. This seems to be where
> > pin 10 is if you look carefully (this is the chip next to the orange
> > connector). Could you take a mega close up picture of this device so we
> can
> > have a good look at it. It must admit if this was the case then the print
> on
> > top of the chip is upside down and the patch memory wouldn't work. But
> that
> > sure as hell looks like the pin 1 dot to me!!
> 
> -- 
> .sig
> -Chromatest J. Pantsmaker
> http://www.chromatest.net
> 
> 
> 
> 
> 
> [Non-text portions of this message have been removed]
>