Synth-DIY Yahoo! Groups Archives

Thread

Worth fixing?

2003-04-15 by Ellsworth Hall

Hey all,

I have a Polysix that I had MIDIed up back in '01. Battery was replaced 2 years before that. Worked fine until last fall when at first it wouldn't retain the patch memory settings, at least until it warmed up. Sounded like a bad IC32 SRAM chip according to the Old Crow.

But now every time each patch comes up fine right away but now they can't be edited. So the patches now ARE being remembered correctly but can't be changed. ??????

Is the board going up due to undetected corrosion (none visible since the battery change)? A different IC chip going bad? Any ideas?

Is this worth having fixed again or it is time to sell it for parts and just focus on my MS2000?

Any comments/ideas appreciated.

- Ells

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

Re: [PolySix] Worth fixing?

2003-04-16 by The Old Crow

On Tue, 15 Apr 2003, Ellsworth Hall wrote:

> Hey all,
>
> I have a Polysix that I had MIDIed up back in '01. Battery was replaced
> 2 years before that. Worked fine until last fall when at first it
> wouldn't retain the patch memory settings, at least until it warmed up.
> Sounded like a bad IC32 SRAM chip according to the Old Crow.
>
> But now every time each patch comes up fine right away but now they
> can't be edited. So the patches now ARE being remembered correctly but
> can't be changed. ??????
>
> Is the board going up due to undetected corrosion (none visible since
> the battery change)? A different IC chip going bad? Any ideas?

Re: [PolySix] Worth fixing?

2003-04-16 by sam enos

You really need to check the board where the battery is if u can use a miroscope the traces are very very touchy..

The Old Crow <oldcrow@oldcrows.net> wrote:On Tue, 15 Apr 2003, Ellsworth Hall wrote:

> Hey all,
>
> I have a Polysix that I had MIDIed up back in '01. Battery was replaced
> 2 years before that. Worked fine until last fall when at first it
> wouldn't retain the patch memory settings, at least until it warmed up.
> Sounded like a bad IC32 SRAM chip according to the Old Crow.
>
> But now every time each patch comes up fine right away but now they
> can't be edited. So the patches now ARE being remembered correctly but
> can't be changed. ??????
>
> Is the board going up due to undetected corrosion (none visible since
> the battery change)? A different IC chip going bad? Any ideas?

Check to make sure IC25 (called a 4011 quad NAND gate) doesn't have
corroded pins or traces. A safe bet would be to replace IC25--this one
you can get at RatShak. IC25 disables writing to the RAM when the machine
is turned on so that random junk doesn't somehow overwrite the RAM
contents. This chip can fail in the same manner as the RAM chip, so
replacement is recommended, given that it is a 4000-series CMOS part and
it is 20+ years old.

Crow
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Re: [PolySix] Worth fixing?

2003-04-16 by Ellsworth Hall

Thanks so very much!! I will check this out and let you know what happens. I so appreciate the info as I'd love to get Poly back to making new sounds.

- Ells

----- Original Message -----
From: sam enos
To: PolySix@yahoogroups.com
Sent: Wednesday, April 16, 2003 12:09 AM
Subject: Re: [PolySix] Worth fixing?

You really need to check the board where the battery is if u can use a miroscope the traces are very very touchy..

The Old Crow <oldcrow@oldcrows.net> wrote:On Tue, 15 Apr 2003, Ellsworth Hall wrote:

> Hey all,
>
> I have a Polysix that I had MIDIed up back in '01. Battery was replaced
> 2 years before that. Worked fine until last fall when at first it
> wouldn't retain the patch memory settings, at least until it warmed up.
> Sounded like a bad IC32 SRAM chip according to the Old Crow.
>
> But now every time each patch comes up fine right away but now they
> can't be edited. So the patches now ARE being remembered correctly but
> can't be changed. ??????
>
> Is the board going up due to undetected corrosion (none visible since
> the battery change)? A different IC chip going bad? Any ideas?

Check to make sure IC25 (called a 4011 quad NAND gate) doesn't have
corroded pins or traces. A safe bet would be to replace IC25--this one
you can get at RatShak. IC25 disables writing to the RAM when the machine
is turned on so that random junk doesn't somehow overwrite the RAM
contents. This chip can fail in the same manner as the RAM chip, so
replacement is recommended, given that it is a 4000-series CMOS part and
it is 20+ years old.

Crow
/**/

Yahoo! Groups SponsorADVERTISEMENT
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To unsubscribe from this group, send an email to:
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[Non-text portions of this message have been removed]

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Re: [PolySix] Worth fixing?

2003-04-18 by Ellsworth Hall

Thanks to everyone for the tips. Will have a go with the IC25 and see what happens and go from there.

- Ells

----- Original Message -----
From: sam enos
To: PolySix@yahoogroups.com
Sent: Wednesday, April 16, 2003 12:09 AM
Subject: Re: [PolySix] Worth fixing?

You really need to check the board where the battery is if u can use a miroscope the traces are very very touchy..

The Old Crow <oldcrow@oldcrows.net> wrote:On Tue, 15 Apr 2003, Ellsworth Hall wrote:

> Hey all,
>
> I have a Polysix that I had MIDIed up back in '01. Battery was replaced
> 2 years before that. Worked fine until last fall when at first it
> wouldn't retain the patch memory settings, at least until it warmed up.
> Sounded like a bad IC32 SRAM chip according to the Old Crow.
>
> But now every time each patch comes up fine right away but now they
> can't be edited. So the patches now ARE being remembered correctly but
> can't be changed. ??????
>
> Is the board going up due to undetected corrosion (none visible since
> the battery change)? A different IC chip going bad? Any ideas?

Check to make sure IC25 (called a 4011 quad NAND gate) doesn't have
corroded pins or traces. A safe bet would be to replace IC25--this one
you can get at RatShak. IC25 disables writing to the RAM when the machine
is turned on so that random junk doesn't somehow overwrite the RAM
contents. This chip can fail in the same manner as the RAM chip, so
replacement is recommended, given that it is a 4000-series CMOS part and
it is 20+ years old.

Crow
/**/

Yahoo! Groups SponsorADVERTISEMENT
var lrec_target="_top"; var lrec_URL = new Array(); lrec_URL[1] = "http://rd.yahoo.com/M=231971.3069354.4492417.1728375/D=egroupweb/S=1705032144:HM/A=1540635/R=0/id=flashurl/*http://shop.store.yahoo.com/cgi-bin/clink?proflowers2+shopping:dmad/M=231971.3069354.4492417.1728375/D=egroupweb/S=1705032144:HM/A=1540635/R=1/1050451396+http://us.rmi.yahoo.com/rmi/http://www.proflowers.com/rmi-unframed-url/http://www.proflowers.com/freechocolate/index.cfm%3FREF=FCHYahooEgroupsEasterLRECgif"; var link="javascript:LRECopenWindow(1)"; var lrec_flashfile = 'http://us.yimg.com/a/pr/proflowers/proflowers_easter_300x250.swf?clickTAG='+link+''; var lrec_altURL = "http://rd.yahoo.com/M=231971.3069354.4492417.1728375/D=egroupweb/S=1705032144:HM/A=1540635/R=2/id=altimgurl/*http://shop.store.yahoo.com/cgi-bin/clink?proflowers2+shopping:dmad/M=231971.3069354.4492417.1728375/D=egroupweb/S=1705032144:HM/A=1540635/R=3/1050451396+http://us.rmi.yahoo.com/rmi/http://www.proflowers.com/rmi-unframed-url/http://www.proflowers.com/freechocolate/index.cfm%3FREF=FCHYahooEgroupsEasterLRECgif"; var lrec_altimg = "http://us.yimg.com/a/pr/proflowers2/easter_tulip_300x250_choc.gif"; var lrec_width = 300; var lrec_height = 250;
To unsubscribe from this group, send an email to:
PolySix-unsubscribe@egroups.com

PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6

Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.

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

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ADVERTISEMENT

To unsubscribe from this group, send an email to:
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Re: [PolySix] Worth fixing?

2003-04-28 by Orlandi Marco_Arcadio

Ellsworth Hall wrote:

>Thanks so very much!! I will check this out and let you know what happens. I so appreciate the info as I'd love to get Poly back to making new sounds.
>
>- Ells
>
>

I'm following this interesting thread, and I invite all Polysix owners
to exchange sound patches ...esperimental ecc.

Marco

RE: [PolySix] Worth fixing?

2003-04-28 by Frank Blades

My poly6 is now back in the land of the living - and I now wnat to start
worign out what I can do with it!

Interesting sounds a-plenty please:)

Frank

-----Original Message-----
From: Orlandi Marco_Arcadio [mailto:Marco.Orlandi@siemens.com]
Sent: 28 April 2003 14:30
To: PolySix@yahoogroups.com
Subject: Re: [PolySix] Worth fixing?

Ellsworth Hall wrote:

>Thanks so very much!! I will check this out and let you know what happens.

I so appreciate the info as I'd love to get Poly back to making new sounds.

>
>- Ells
>
>

I'm following this interesting thread, and I invite all Polysix owners
to exchange sound patches ...esperimental ecc.

Marco

RE: [PolySix] Worth fixing?

2003-04-28 by David Davis

One thing I particularly like is setting the resonance on
the VCFs so they are just about gurgling into
self-oscillation, but not quite....
....and setting the keyboard track so that is pitches the
self-oscillation about 3rd or 4th or 5th above the pitch of
the VCO (not a linear track up the keyboard)
.....then add slow ADSR env to the VCA ....
.....you get lovely glassy stringy sounds with the
resonance all strewn ambient on top.....

--- Frank Blades <frank@ents24.com> wrote: > My poly6 is
now back in the land of the living - and I

> now wnat to start
> worign out what I can do with it!
>
> Interesting sounds a-plenty please:)
>
> Frank
>
> -----Original Message-----
> From: Orlandi Marco_Arcadio
> [mailto:Marco.Orlandi@siemens.com]
> Sent: 28 April 2003 14:30
> To: PolySix@yahoogroups.com
> Subject: Re: [PolySix] Worth fixing?
>
>
>
>
> Ellsworth Hall wrote:
>
> >Thanks so very much!! I will check this out and let you
> know what happens.
> I so appreciate the info as I'd love to get Poly back to
> making new sounds.
> >
> >- Ells
> >
> >
>
> I'm following this interesting thread, and I invite all
> Polysix owners
> to exchange sound patches ...esperimental ecc.
>
> Marco
>
>
> ------------------------ Yahoo! Groups Sponsor
>
> To unsubscribe from this group, send an email to:
> PolySix-unsubscribe@egroups.com
>
> PolySix "Digiest" Page:
> http://www.acc.umu.se/~amber/Poly6
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
>
>
>

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