Discussion about the Korg PolySix synthesizer

Now that the photocoupler is working, I've noticed some parameters not being stored for a few patches. The affected patches are A5,6,7 and C6,7. A5 just seems to lose the cutoff value. The others lose MG values and a couple seem to lose just about everything. I can't see anything that would cause this other than a bad memory chip. So, the question is, where is a good source for the TC5514 chip and are there other compatible replacements? It looks like Vintage Synth has them.

I purchased them here:
http://www.questcomp.com/QuestDetailsAll.aspx?pn=TC5514APL-3&pnid=200555&stock=Yes

<http://www.questcomp.com/QuestDetailsAll.aspx?pn=TC5514APL-3&pnid=200555&stock=Yes>Not
cheap, but slightly cheaper than Vintage Planet if you are buying a few.

j

On Tue, Mar 9, 2010 at 9:33 AM, longenough2002 <backshall1@bellsouth.net>wrote:

>
>
> Now that the photocoupler is working, I've noticed some parameters not
> being stored for a few patches. The affected patches are A5,6,7 and C6,7. A5
> just seems to lose the cutoff value. The others lose MG values and a couple
> seem to lose just about everything. I can't see anything that would cause
> this other than a bad memory chip. So, the question is, where is a good
> source for the TC5514 chip and are there other compatible replacements? It
> looks like Vintage Synth has them.
>
>  
>


[Non-text portions of this message have been removed]

Just before you ditch the old SRAM chip make sure you have correctly set up
the d/a converter using the procedure detailed in the manual!!

Cheers,
Andy


On 09/03/2010 17:33, "longenough2002" <backshall1@bellsouth.net> wrote:

>  
>  
>  
>    
> 
> Now that the photocoupler is working, I've noticed some parameters not being
> stored for a few patches. The affected patches are A5,6,7 and C6,7. A5 just
> seems to lose the cutoff value. The others lose MG values and a couple seem to
> lose just about everything. I can't see anything that would cause this other
> than a bad memory chip. So, the question is, where is a good source for the
> TC5514 chip and are there other compatible replacements? It looks like Vintage
> Synth has them.
> 
>  
>    
> 
> 



[Non-text portions of this message have been removed]

The DAC was off a bit. Must have bumped it while messing with all the other
stuff. However, readjusting it changed the sound of all patches a bit but
didn't help fix the few patches that just won't save what I put in them. I
guess I'll still have to try the RAM chip. Quest has a US $25 minimum and
Vintage Planet has a 15 Euro minimum. Anybody know a good psychic who can
tell me what parts I'll need next week or next month?
Don

  _____  

From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
Andrew Jury
Sent: Tuesday, March 09, 2010 1:04 PM
To: PolySix@yahoogroups.com
Subject: Re: [PolySix] TC5514 memory chip


  

Just before you ditch the old SRAM chip make sure you have correctly set up
the d/a converter using the procedure detailed in the manual!!

Cheers,
Andy

On 09/03/2010 17:33, "longenough2002" <backshall1@bellsout
<mailto:backshall1%40bellsouth.net> h.net> wrote:

> 
> 
> 
> 
> 
> Now that the photocoupler is working, I've noticed some parameters not
being
> stored for a few patches. The affected patches are A5,6,7 and C6,7. A5
just
> seems to lose the cutoff value. The others lose MG values and a couple
seem to
> lose just about everything. I can't see anything that would cause this
other
> than a bad memory chip. So, the question is, where is a good source for
the
> TC5514 chip and are there other compatible replacements? It looks like
Vintage
> Synth has them.
> 
> 
> 
> 
> 

[Non-text portions of this message have been removed]






[Non-text portions of this message have been removed]

Worth making sure you are getting the right analogue voltages back from the
decode... It is always worth bearing in mind that the Intersil HM6514 is a
valid replacement for the old Toshiba SRAM, however, it does have slightly
higher current consumption so be aware. If you are located in the US this
lot reckon they have them available!

http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&pro
ductId=43238&catalogId=10001&freeText=6514&app.products.maxperpage=15&storeI
d=10001&search_type=jamecoall&ddkey=http:StoreCatalogDrillDownView

A


On 10/03/2010 02:51, "backshall1 (dsl)" <backshall1@bellsouth.net> wrote:

>  
>  
>  
>    
> 
> The DAC was off a bit. Must have bumped it while messing with all the other
> stuff. However, readjusting it changed the sound of all patches a bit but
> didn't help fix the few patches that just won't save what I put in them. I
> guess I'll still have to try the RAM chip. Quest has a US $25 minimum and
> Vintage Planet has a 15 Euro minimum. Anybody know a good psychic who can
> tell me what parts I'll need next week or next month?
> Don
> 
> _____  
> 
> From: PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com>
> [mailto:PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com> ] On Behalf
> Of
> Andrew Jury
> Sent: Tuesday, March 09, 2010 1:04 PM
> To: PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com>
> Subject: Re: [PolySix] TC5514 memory chip
> 
> Just before you ditch the old SRAM chip make sure you have correctly set up
> the d/a converter using the procedure detailed in the manual!!
> 
> Cheers,
> Andy
> 
> On 09/03/2010 17:33, "longenough2002" <backshall1@bellsout
> <mailto:backshall1%40bellsouth.net> h.net> wrote:
> 
>> > 
>> > 
>> > 
>> > 
>> > 
>> > Now that the photocoupler is working, I've noticed some parameters not
> being
>> > stored for a few patches. The affected patches are A5,6,7 and C6,7. A5
> just
>> > seems to lose the cutoff value. The others lose MG values and a couple
> seem to
>> > lose just about everything. I can't see anything that would cause this
> other
>> > than a bad memory chip. So, the question is, where is a good source for
> the
>> > TC5514 chip and are there other compatible replacements? It looks like
> Vintage
>> > Synth has them.
>> > 
>> > 
>> > 
>> > 
>> > 
> 
> [Non-text portions of this message have been removed]
> 
> [Non-text portions of this message have been removed]
> 
>  
>    
> 
> 



[Non-text portions of this message have been removed]

--- In PolySix@yahoogroups.com, "longenough2002" <backshall1@...> wrote:
>
> Now that the photocoupler is working, I've noticed some parameters not being stored for a few patches. The affected patches are A5,6,7 and C6,7. A5 just seems to lose the cutoff value. The others lose MG values and a couple seem to lose just about everything. I can't see anything that would cause this other than a bad memory chip. So, the question is, where is a good source for the TC5514 chip and are there other compatible replacements? It looks like Vintage Synth has them.
>
 I have good stock and will always beat any price including shipping. (I only charge 2.00 to pack/ship a chip. Most use snooty much more expensive methods which often cost near what the item costs)  Have NOS chips in stock. -Bob (sounddoctorin.com/synthtec/parts/key.htm for ordering instructions)

Should have thought of asking you first, Bob. Too late now, though. I
already ordered a half dozen from Quest.
Don B.

  _____  

From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
Robert Weigel
Sent: Friday, March 26, 2010 11:58 PM
To: PolySix@yahoogroups.com
Subject: [PolySix] Re: TC5514 memory chip


  



--- In PolySix@yahoogroups <mailto:PolySix%40yahoogroups.com> .com,
"longenough2002" <backshall1@...> wrote:
>
> Now that the photocoupler is working, I've noticed some parameters not
being stored for a few patches. The affected patches are A5,6,7 and C6,7. A5
just seems to lose the cutoff value. The others lose MG values and a couple
seem to lose just about everything. I can't see anything that would cause
this other than a bad memory chip. So, the question is, where is a good
source for the TC5514 chip and are there other compatible replacements? It
looks like Vintage Synth has them.
>
I have good stock and will always beat any price including shipping. (I only
charge 2.00 to pack/ship a chip. Most use snooty much more expensive methods
which often cost near what the item costs) Have NOS chips in stock. -Bob
(sounddoctorin.com/synthtec/parts/key.htm for ordering instructions) 






[Non-text portions of this message have been removed]