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Yamaha IG00150

Yamaha IG00150

2009-07-29 by John Henson

Hi list,
A client of mine has a CS30 with a dead LFO chip.
It seems pretty well unobtainable, but my question is this.
Was it a chip rebadged by Yamaha (ie a 566 or a 4151) or has anyone produced a module to emulate it?
All the best
John

Re: [vintagesynthrepair] Yamaha IG00150

2009-07-29 by Alan Probandt

Often inexpensive microcontrollers like the AVR or the PIC can be programmed to emulate custom commercial-electronics digital (CCEICs) integrated circuits from the 20th century. It is necessary to know what the CCEICs actually do so that their replacements can be put into the original circuit.

This particular LFO chip might function by writing configuration values to a series of registers and have a low frequency analog waveform come out the other side of the LFO chip. Cheap microcontrollers like the AVR do a good job at making low frequency analog waveforms by using pulse-width modulation. Basically the high +5V state is turned on for a percentage of a period and turned off for the rest of the period. A compressor/resistor combination smooths out the the on/off cycles into an analog level.

Even though it's impossible to get a replacement for this LFO IC, is the data sheet available? Or any information on the chip? Microcomputer techs sometimes make a custom 'mini-logic-analyser' to find out what the main CPU is writing to a peripheral chip into an old logic board. They will put eight input lines of a port onto the data bus going into the peripheral chip, several lines on the address/register bus, and one or two lines on the peripheral chip's read/write line to act as a trigger. When the CPU writes data to the peripheral IC, the data gets captured. Sometimes it works if the peripheral IC isn't too complicated.

Do you know anything about the operation of this LFO chip?
Show quoted textHide quoted text

--- On Wed, 7/29/09, John Henson wrote:

From: John Henson
Subject: [vintagesynthrepair] Yamaha IG00150
To: synth-diy@...
Cc: vintagesynthrepair@yahoogroups.com
Date: Wednesday, July 29, 2009, 7:36 AM



Hi list,
A client of mine has a CS30 with a dead LFO chip.
It seems pretty well unobtainable, but my question is this.
Was it a chip rebadged by Yamaha (ie a 566 or a 4151) or has anyone produced a module to emulate it?
All the best
John



Re: Yamaha IG00150

2009-07-29 by duncan

>>A client of mine has a CS30 with a dead LFO chip.....unobtainable<<

you sure? I bought bits for my cs30 through yamaha kemble in the uk quite recently.

in any case, look at the schemos & decide if you can be bothered to work in an equivalent of some sort. it's a VC-LFO &, from memory, feeds a wave-shaper chip & thence the modulation buss.

if you get stuck (for the schemos), let me know.

duncan/london-uk

Re: [vintagesynthrepair] Yamaha IG00150

2009-07-29 by Russ Rose

according to my yamaha master parts list
the IG00150 is an AN374
On Jul 29, 2009, at 10:36 AM, John Henson wrote:



Hi list,
A client of mine has a CS30 with a dead LFO chip.
It seems pretty well unobtainable, but my question is this.
Was it a chip rebadged by Yamaha (ie a 566 or a 4151) or has anyone produced a module to emulate it?
All the best
John



Re: [vintagesynthrepair] Yamaha IG00150

2009-07-29 by Russ Rose

whoops
IG000150 is AN374
IG001500 is M51620P
On Jul 29, 2009, at 10:36 AM, John Henson wrote:



Hi list,
A client of mine has a CS30 with a dead LFO chip.
It seems pretty well unobtainable, but my question is this.
Was it a chip rebadged by Yamaha (ie a 566 or a 4151) or has anyone produced a module to emulate it?
All the best
John



Re: [vintagesynthrepair] Yamaha IG00150

2009-07-29 by Miguel Mendoza

Sorry to interfere, but do you know if there is an equivalent of IG00159 (envelope IC) or how to find one?
Thanks in advance!
Show quoted textHide quoted text
----- Original Message -----
From: Russ Rose
Sent: Wednesday, July 29, 2009 10:12 PM
Subject: Re: [vintagesynthrepair] Yamaha IG00150

whoops

IG000150 is AN374
IG001500 is M51620P
On Jul 29, 2009, at 10:36 AM, John Henson wrote:



Hi list,
A client of mine has a CS30 with a dead LFO chip.
It seems pretty well unobtainable, but my question is this.
Was it a chip rebadged by Yamaha (ie a 566 or a 4151) or has anyone produced a module to emulate it?
All the best
John



Re: [vintagesynthrepair] Yamaha IG00150

2009-07-29 by Russ Rose

IG001590 lists aa a M51629P
On Jul 29, 2009, at 4:17 PM, Miguel Mendoza wrote:



Sorry to interfere, but do you know if there is an equivalent of IG00159 (envelope IC) or how to find one?
Thanks in advance!
----- Original Message -----
From: Russ Rose
Sent: Wednesday, July 29, 2009 10:12 PM
Subject: Re: [vintagesynthrepair] Yamaha IG00150

whoops

IG000150 is AN374
IG001500 is M51620P
On Jul 29, 2009, at 10:36 AM, John Henson wrote:



Hi list,
A client of mine has a CS30 with a dead LFO chip.
It seems pretty well unobtainable, but my question is this.
Was it a chip rebadged by Yamaha (ie a 566 or a 4151) or has anyone produced a module to emulate it?
All the best
John







Re: [vintagesynthrepair] Yamaha IG00150

2009-07-29 by Miguel Mendoza

Thanks!
----- Original Message -----
From: Russ Rose
Sent: Wednesday, July 29, 2009 10:33 PM
Subject: Re: [vintagesynthrepair] Yamaha IG00150

IG001590 lists aa a M51629P

On Jul 29, 2009, at 4:17 PM, Miguel Mendoza wrote:



Sorry to interfere, but do you know if there is an equivalent of IG00159 (envelope IC) or how to find one?
Thanks in advance!
----- Original Message -----
From: Russ Rose
Sent: Wednesday, July 29, 2009 10:12 PM
Subject: Re: [vintagesynthrepair] Yamaha IG00150

whoops

IG000150 is AN374
IG001500 is M51620P
On Jul 29, 2009, at 10:36 AM, John Henson wrote:



Hi list,
A client of mine has a CS30 with a dead LFO chip.
It seems pretty well unobtainable, but my question is this.
Was it a chip rebadged by Yamaha (ie a 566 or a 4151) or has anyone produced a module to emulate it?
All the best
John







Re: Yamaha IG00150

2009-07-29 by Quazimodo

Hi Russ,

Please could you tell me what the IG001530 lists as?

Thanks,
Tom



--- In vintagesynthrepair@yahoogroups.com, Russ Rose <russrose@...> wrote:
Show quoted textHide quoted text
>
> IG001590 lists aa a M51629P
>

Re: [vintagesynthrepair] Re: Yamaha IG00150

2009-07-29 by Russ Rose

M51623P
Show quoted textHide quoted text
On Jul 29, 2009, at 4:54 PM, Quazimodo wrote:

> Hi Russ,
>
> Please could you tell me what the IG001530 lists as?
>
> Thanks,
> Tom
>
>
>
> --- In vintagesynthrepair@yahoogroups.com, Russ Rose <russrose@...>  
> wrote:
>>
>> IG001590 lists aa a M51629P
>>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

Roland SH 101 power adaptor problem

2010-03-03 by Miguel Mendoza

Hello group, I'm having a problem with my Roland SH 101:
When I turn it on, it takes some time to start working. After this, the synth is completly out of tune.
After some time, the external power supply is getting very hot and I turn it off.
I tried with several external power adaptors with the same result.
I think that it could be a problem with the internal voltage regulator or a conderser but I would like to know if any of you know anything about this problem or have any idea of what it could be.
Thanks a lot in advance.
Regards.
Miguel.

Re: [vintagesynthrepair] Roland SH 101 power adaptor problem

2010-03-11 by Scott S.

Miguel, what type of power supplies are you using? I think the SH-101 is positive ground, unlike most other external power supplies. That probably is not your problem, but thought I would mention it here for reference. Roland could have put in diodes to protect it, or possibly a zener to correct the polarity?

Out of tune could just mean that it needs calibrating.

thx-shs
Show quoted textHide quoted text
On Wed, Mar 3, 2010 at 2:17 PM, Miguel Mendoza <miguel@...> wrote:

Hello group, I'm having a problem with my Roland SH 101:
When I turn it on, it takes some time to start working. After this, the synth is completly out of tune.
After some time, the external power supply is getting very hot and I turn it off.
I tried with several external power adaptors with the same result.
I think that it could be a problem with the internal voltage regulator or a conderser but I would like to know if any of you know anything about this problem or have any idea of what it could be.
Thanks a lot in advance.
Regards.
Miguel.

Re: [vintagesynthrepair] Roland SH 101 power adaptor problem

2010-03-11 by Miguel Mendoza

Hi Scott, thanks a lot for your answer. The polarity of the external power supply can be swaped changing the position of the tip. Sometimes I have plugged it in the wrong way and the result is that the unit doesn't work. Anyway, I'll check that.
Thanks!
Kind regards.
Miguel.

From: Scott S.
Sent: Thursday, March 11, 2010 4:13 PM
Subject: Re: [vintagesynthrepair] Roland SH 101 power adaptor problem

Miguel, what type of power supplies are you using? I think the SH-101 is positive ground, unlike most other external power supplies. That probably is not your problem, but thought I would mention it here for reference. Roland could have put in diodes to protect it, or possibly a zener to correct the polarity?

Out of tune could just mean that it needs calibrating.

thx-shs

On Wed, Mar 3, 2010 at 2:17 PM, Miguel Mendoza <miguel@filminteractive.es> wrote:

Hello group, I'm having a problem with my Roland SH 101:
When I turn it on, it takes some time to start working. After this, the synth is completly out of tune.
After some time, the external power supply is getting very hot and I turn it off.
I tried with several external power adaptors with the same result.
I think that it could be a problem with the internal voltage regulator or a conderser but I would like to know if any of you know anything about this problem or have any idea of what it could be.
Thanks a lot in advance.
Regards.
Miguel.

Re: [vintagesynthrepair] Roland SH 101 power adaptor problem

2010-03-11 by Philip

There's your problem right there, if you've plugged it in the wrong way round it will almost certainly damage internal components.

The 101 is pretty sensitive to wrong psu's. It also needs a regulated supply and so It specifies a Roland PSA adaptor. Most cheap adaptors are un-regulated.

Phil.


________________________________
From: Miguel Mendoza <miguel@filminteractive.es>
To: vintagesynthrepair@yahoogroups.com
Sent: Thu, 11 March, 2010 15:20:38
Subject: Re: [vintagesynthrepair] Roland SH 101 power adaptor problem

  
Hi Scott, thanks a lot for your answer. The polarity of 
the external power supply can be swaped changing the position of the tip. 
Sometimes I have plugged it in the wrong way and the result is that the unit 
doesn't work. Anyway, I'll check that.
 
Thanks!
 
Kind regards.
 
Miguel.
 


From: Scott S. 
Sent: Thursday, March 11, 2010 4:13 PM
To: vintagesynthrepair@ yahoogroups. com 
Subject: Re: [vintagesynthrepair ] Roland SH 101 power adaptor 
problem
  
Miguel, what type of power supplies are you using? I think the SH-101 is 
positive ground, unlike most other external power supplies. That probably is not 
your problem, but thought I would mention it here for reference. Roland could 
have put in diodes to protect it, or possibly a zener to correct the 
polarity?

Out of tune could just mean that it needs 
calibrating.

thx-shs
Show quoted textHide quoted text
On Wed, Mar 3, 2010 at 2:17 PM, Miguel Mendoza <miguel@filminteract ive.es> wrote:

  
>Hello group, I'm having a problem with my Roland SH 
>  101:
> 
>When I turn it on, it takes some time to start 
>  working. After this, the synth is completly out of tune.
>After some time, the external power supply is getting 
>  very hot and I turn it off.
> 
>I tried with several external power adaptors with the 
>  same result.
> 
>I think that it could be a problem with the internal 
>  voltage regulator or a conderser but I would like to know if any of you 
>  know anything about this problem or have any idea of what it could 
>  be.
> 
>Thanks a lot in advance.
> 
>Regards.
> 
>Miguel.

Re: [vintagesynthrepair] Roland SH 101 power adaptor problem

2010-03-11 by Miguel Mendoza

I just checked the psu and it's a regulated psu. I think that I never connected it in the wrong way into the SH, it hapened with other machines. Anyway, I though that swaping the polarity couldn't produce damages, is this common in other instruments?

Thank.

Miguel.
Show quoted textHide quoted text
From: Philip 
Sent: Thursday, March 11, 2010 4:38 PM
To: vintagesynthrepair@yahoogroups.com 
Subject: Re: [vintagesynthrepair] Roland SH 101 power adaptor problem


  

There's your problem right there, if you've plugged it in the wrong way round it will almost certainly damage internal components.


The 101 is pretty sensitive to wrong psu's. It also needs a regulated supply and so It specifies a Roland PSA adaptor. Most cheap adaptors are un-regulated.


Phil.


--------------------------------------------------------------------------------
From: Miguel Mendoza <miguel@...>
To: vintagesynthrepair@yahoogroups.com
Sent: Thu, 11 March, 2010 15:20:38
Subject: Re: [vintagesynthrepair] Roland SH 101 power adaptor problem

  

Hi Scott, thanks a lot for your answer. The polarity of the external power supply can be swaped changing the position of the tip. Sometimes I have plugged it in the wrong way and the result is that the unit doesn't work. Anyway, I'll check that.

Thanks!

Kind regards.

Miguel.



From: Scott S. 
Sent: Thursday, March 11, 2010 4:13 PM
To: vintagesynthrepair@ yahoogroups. com 
Subject: Re: [vintagesynthrepair ] Roland SH 101 power adaptor problem


  
Miguel, what type of power supplies are you using? I think the SH-101 is positive ground, unlike most other external power supplies. That probably is not your problem, but thought I would mention it here for reference. Roland could have put in diodes to protect it, or possibly a zener to correct the polarity?

Out of tune could just mean that it needs calibrating.

thx-shs



On Wed, Mar 3, 2010 at 2:17 PM, Miguel Mendoza <miguel@filminteract ive.es> wrote:

    

  Hello group, I'm having a problem with my Roland SH 101:

  When I turn it on, it takes some time to start working. After this, the synth is completly out of tune.
  After some time, the external power supply is getting very hot and I turn it off.

  I tried with several external power adaptors with the same result.

  I think that it could be a problem with the internal voltage regulator or a conderser but I would like to know if any of you know anything about this problem or have any idea of what it could be.

  Thanks a lot in advance.

  Regards.

  Miguel.

Re: [vintagesynthrepair] Roland SH 101 power adaptor problem

2010-03-11 by Philip

Introducing DC voltage of the wrong polarity to electronics can cause a lot of damage.





________________________________
From: Miguel Mendoza <miguel@...>
To: vintagesynthrepair@yahoogroups.com
Sent: Thu, 11 March, 2010 17:18:45
Subject: Re: [vintagesynthrepair] Roland SH 101 power adaptor problem

  
I just checked the psu and it's a regulated psu. I think 
that I never connected it in the wrong way into the SH, it hapened with other 
machines. Anyway, I though that swaping the polarity couldn't produce 
damages, is this common in other instruments?
 
Thank.
 
Miguel.


From: Philip 
Sent: Thursday, March 11, 2010 4:38 PM
To: vintagesynthrepair@ yahoogroups. com 
Subject: Re: [vintagesynthrepair ] Roland SH 101 power adaptor 
problem
  
There's your problem right there, if you've plugged it in the wrong way 
round it will almost certainly damage internal components.

The 101 is pretty sensitive to wrong psu's. It also needs a 
regulated supply and so It specifies a Roland PSA adaptor. Most cheap 
adaptors are un-regulated.

Phil.


________________________________
 From: Miguel Mendoza <miguel@filminteract ive.es>
To: vintagesynthrepair@ yahoogroups. com
Sent: Thu, 11 March, 2010 
15:20:38
Subject: Re: 
[vintagesynthrepair ] Roland SH 101 power adaptor 
problem

  
Hi Scott, thanks a lot for your answer. The polarity of 
the external power supply can be swaped changing the position of the tip. 
Sometimes I have plugged it in the wrong way and the result is that the unit 
doesn't work. Anyway, I'll check that.
 
Thanks!
 
Kind regards.
 
Miguel.
 


From: Scott S. 
Sent: Thursday, March 11, 2010 4:13 PM
To: vintagesynthrepair@ 
yahoogroups. com 
Subject: Re: [vintagesynthrepair ] Roland SH 101 power adaptor 
problem
  
Miguel, what type of power supplies are you using? I think the SH-101 is 
positive ground, unlike most other external power supplies. That probably is not 
your problem, but thought I would mention it here for reference. Roland could 
have put in diodes to protect it, or possibly a zener to correct the 
polarity?

Out of tune could just mean that it needs 
calibrating.

thx-shs


On Wed, Mar 3, 2010 at 2:17 PM, Miguel Mendoza <miguel@filminteract 
ive.es> wrote:
Show quoted textHide quoted text
>Hello group, I'm having a problem with my Roland SH 
>  101:
> 
>When I turn it on, it takes some time to start 
>  working. After this, the synth is completly out of tune.
>After some time, the external power supply is getting 
>  very hot and I turn it off.
> 
>I tried with several external power adaptors with the 
>  same result.
> 
>I think that it could be a problem with the internal 
>  voltage regulator or a conderser but I would like to know if any of you 
>  know anything about this problem or have any idea of what it could 
>  be.
> 
>Thanks a lot in advance.
> 
>Regards.
> 
>Miguel.

Re: [vintagesynthrepair] Roland SH 101 power adaptor problem

2010-03-11 by Miguel Mendoza

Scary sentence indeed...

Thanks!
Show quoted textHide quoted text
From: Philip 
Sent: Thursday, March 11, 2010 6:52 PM
To: vintagesynthrepair@yahoogroups.com 
Subject: Re: [vintagesynthrepair] Roland SH 101 power adaptor problem


  



Introducing DC voltage of the wrong polarity to electronics can cause a lot of damage.







--------------------------------------------------------------------------------
From: Miguel Mendoza <miguel@...>
To: vintagesynthrepair@yahoogroups.com
Sent: Thu, 11 March, 2010 17:18:45
Subject: Re: [vintagesynthrepair] Roland SH 101 power adaptor problem

  

I just checked the psu and it's a regulated psu. I think that I never connected it in the wrong way into the SH, it hapened with other machines. Anyway, I though that swaping the polarity couldn't produce damages, is this common in other instruments?

Thank.

Miguel.


From: Philip 
Sent: Thursday, March 11, 2010 4:38 PM
To: vintagesynthrepair@ yahoogroups. com 
Subject: Re: [vintagesynthrepair ] Roland SH 101 power adaptor problem


  

There's your problem right there, if you've plugged it in the wrong way round it will almost certainly damage internal components.


The 101 is pretty sensitive to wrong psu's. It also needs a regulated supply and so It specifies a Roland PSA adaptor. Most cheap adaptors are un-regulated.


Phil.


--------------------------------------------------------------------------------
From: Miguel Mendoza <miguel@filminteract ive.es>
To: vintagesynthrepair@ yahoogroups. com
Sent: Thu, 11 March, 2010 15:20:38
Subject: Re: [vintagesynthrepair ] Roland SH 101 power adaptor problem

  

Hi Scott, thanks a lot for your answer. The polarity of the external power supply can be swaped changing the position of the tip. Sometimes I have plugged it in the wrong way and the result is that the unit doesn't work. Anyway, I'll check that.

Thanks!

Kind regards.

Miguel.



From: Scott S. 
Sent: Thursday, March 11, 2010 4:13 PM
To: vintagesynthrepair@ yahoogroups. com 
Subject: Re: [vintagesynthrepair ] Roland SH 101 power adaptor problem


  
Miguel, what type of power supplies are you using? I think the SH-101 is positive ground, unlike most other external power supplies. That probably is not your problem, but thought I would mention it here for reference. Roland could have put in diodes to protect it, or possibly a zener to correct the polarity?

Out of tune could just mean that it needs calibrating.

thx-shs



On Wed, Mar 3, 2010 at 2:17 PM, Miguel Mendoza <miguel@filminteract ive.es> wrote:

    

  Hello group, I'm having a problem with my Roland SH 101:

  When I turn it on, it takes some time to start working. After this, the synth is completly out of tune.
  After some time, the external power supply is getting very hot and I turn it off.

  I tried with several external power adaptors with the same result.

  I think that it could be a problem with the internal voltage regulator or a conderser but I would like to know if any of you know anything about this problem or have any idea of what it could be.

  Thanks a lot in advance.

  Regards.

  Miguel.

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