Discussion about the Korg PolySix synthesizer

Hi everybody !

First of all, I would like to thank's Jed and all the team for the good job done !

I purchased the clone PCB some month ago and I assembled the board these last weeks. I try it but, unfortunely, the P6 has some probs :

1) At the start, the MG LED blink slowly and goes faster until to stay up.

2) The programmer knobs don't respond.

3) I try to calibrate the P6, but without the 56k resistor plug on the power supply board, the LED 5 and 8 are alight.

4) In test mode, the programmer knobs respond

5) I think, there is no sound change when I play with the different knobs (sorry I'm just an electronician guitarist who like to fix up some hold stuff =) )


My differents readings of these group let me think that the problems 2 and 3 come from the DAC08. Regarding the MG LED, I don't really know because I fixed the 2 bugs on the PCB board.




So before trying to fix all these issues, I've just some questions :

- Is it really necessary to fill the metallized vias ?

- Is there a procedure to check the good functions of the board with the different test points ?


Thank's a lot for the help

Lucas

Viewing ic 30.31, 21 can not be good

 

!!! to the card clone are bug

 

https://sites.google.com/site/jedjorgensen/klm367a/images/pcb-bugs-errors

 

Sheet resistance for 56k I retrieves small connectors

USB to an old pc case weld strength

 

 

 

http://audio.synth.vintage.free.fr/images/synthe/korg/polysix_2eme/outi_56k_
reglage.jpg

http://audio.synth.vintage.free.fr/modules.php?name=Forums&file=viewtopic&p=
328&sid=d26dcc3a67fb356186e8659daebdae89#328

http://audio.synth.vintage.free.fr/modules.php?name=Forums&file=viewtopic&t=
92#339

 

De : PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] De la part de
tuk88@rocketmail.com
Envoyé : jeudi 21 juin 2012 00:31
À : PolySix@yahoogroups.com
Objet : [PolySix] Problems KLM-367 clone

 

  

Hi everybody !

First of all, I would like to thank's Jed and all the team for the good job
done !

I purchased the clone PCB some month ago and I assembled the board these
last weeks. I try it but, unfortunely, the P6 has some probs :

1) At the start, the MG LED blink slowly and goes faster until to stay up.

2) The programmer knobs don't respond.

3) I try to calibrate the P6, but without the 56k resistor plug on the power
supply board, the LED 5 and 8 are alight.

4) In test mode, the programmer knobs respond

5) I think, there is no sound change when I play with the different knobs
(sorry I'm just an electronician guitarist who like to fix up some hold
stuff =) )

My differents readings of these group let me think that the problems 2 and 3
come from the DAC08. Regarding the MG LED, I don't really know because I
fixed the 2 bugs on the PCB board.

So before trying to fix all these issues, I've just some questions :

- Is it really necessary to fill the metallized vias ?

- Is there a procedure to check the good functions of the board with the
different test points ?

Thank's a lot for the help

Lucas





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

All Polysix you see on my site have been repaired and works well without
this card clone should just be patient to restore this card

 

 

De : PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] De la part de
tuk88@rocketmail.com
Envoyé : jeudi 21 juin 2012 00:31
À : PolySix@yahoogroups.com
Objet : [PolySix] Problems KLM-367 clone

 

  

Hi everybody !

First of all, I would like to thank's Jed and all the team for the good job
done !

I purchased the clone PCB some month ago and I assembled the board these
last weeks. I try it but, unfortunely, the P6 has some probs :

1) At the start, the MG LED blink slowly and goes faster until to stay up.

2) The programmer knobs don't respond.

3) I try to calibrate the P6, but without the 56k resistor plug on the power
supply board, the LED 5 and 8 are alight.

4) In test mode, the programmer knobs respond

5) I think, there is no sound change when I play with the different knobs
(sorry I'm just an electronician guitarist who like to fix up some hold
stuff =) )

My differents readings of these group let me think that the problems 2 and 3
come from the DAC08. Regarding the MG LED, I don't really know because I
fixed the 2 bugs on the PCB board.

So before trying to fix all these issues, I've just some questions :

- Is it really necessary to fill the metallized vias ?

- Is there a procedure to check the good functions of the board with the
different test points ?

Thank's a lot for the help

Lucas





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

Hi Lucas,

 

Maybe you could post some closeup photos of the new board on the web
somewhere we can see them. That way we can see if there is any obvious
problem. No, the vias do not need to be filled. 

Which capacitor did you use for C23, the 10p or the 22p? You may have a
clock stability problem and should probably try both.

Most functions should work reasonably well even before calibration so I
would check proper component placement and make sure all pins are soldered.

 

Don Backshall

 

  _____  

From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
tuk88@rocketmail.com
Sent: Wednesday, June 20, 2012 4:01 PM
To: PolySix@yahoogroups.com
Subject: [PolySix] Problems KLM-367 clone

 

  

Hi everybody !

First of all, I would like to thank's Jed and all the team for the good job
done !

I purchased the clone PCB some month ago and I assembled the board these
last weeks. I try it but, unfortunely, the P6 has some probs :

1) At the start, the MG LED blink slowly and goes faster until to stay up.

2) The programmer knobs don't respond.

3) I try to calibrate the P6, but without the 56k resistor plug on the power
supply board, the LED 5 and 8 are alight.

4) In test mode, the programmer knobs respond

5) I think, there is no sound change when I play with the different knobs
(sorry I'm just an electronician guitarist who like to fix up some hold
stuff =) )

My differents readings of these group let me think that the problems 2 and 3
come from the DAC08. Regarding the MG LED, I don't really know because I
fixed the 2 bugs on the PCB board.

So before trying to fix all these issues, I've just some questions :

- Is it really necessary to fill the metallized vias ?

- Is there a procedure to check the good functions of the board with the
different test points ?

Thank's a lot for the help

Lucas





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

Original C 23    22Pf

 

De : PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] De la part de
backshall1
Envoyé : jeudi 21 juin 2012 17:00
À : PolySix@yahoogroups.com
Objet : RE: [PolySix] Problems KLM-367 clone

 

  

Hi Lucas,

Maybe you could post some closeup photos of the new board on the web
somewhere we can see them. That way we can see if there is any obvious
problem. No, the vias do not need to be filled. 

Which capacitor did you use for C23, the 10p or the 22p? You may have a
clock stability problem and should probably try both.

Most functions should work reasonably well even before calibration so I
would check proper component placement and make sure all pins are soldered.

Don Backshall

_____ 

From: PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com>
[mailto:PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com> ] On
Behalf Of
tuk88@rocketmail.com <mailto:tuk88%40rocketmail.com> 
Sent: Wednesday, June 20, 2012 4:01 PM
To: PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com> 
Subject: [PolySix] Problems KLM-367 clone

Hi everybody !

First of all, I would like to thank's Jed and all the team for the good job
done !

I purchased the clone PCB some month ago and I assembled the board these
last weeks. I try it but, unfortunely, the P6 has some probs :

1) At the start, the MG LED blink slowly and goes faster until to stay up.

2) The programmer knobs don't respond.

3) I try to calibrate the P6, but without the 56k resistor plug on the power
supply board, the LED 5 and 8 are alight.

4) In test mode, the programmer knobs respond

5) I think, there is no sound change when I play with the different knobs
(sorry I'm just an electronician guitarist who like to fix up some hold
stuff =) )

My differents readings of these group let me think that the problems 2 and 3
come from the DAC08. Regarding the MG LED, I don't really know because I
fixed the 2 bugs on the PCB board.

So before trying to fix all these issues, I've just some questions :

- Is it really necessary to fill the metallized vias ?

- Is there a procedure to check the good functions of the board with the
different test points ?

Thank's a lot for the help

Lucas

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





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

Thank's for your answer !

@philippe.69 :

I'm french. I'll check your website ;) I fixed the 2 first bugs (regarding R98 and R52). What did you mean by : "Viewing ic 30.31, 21 can not be good" ? 

@backshall1 : I've got a 22pF capacitor. Here can you find some pictures :

http://imageshack.us/g/802/dscf1848t.jpg/



May it be possible for someone to give me a little functionnal schematic of the KLM-367 ? I really want to know how this board works.

I noticed the "Test" switch is in backwards, so when you move the switches
towards "Norm", it will be in Test mode.

Don B.

 

  _____  

From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
tuk88@rocketmail.com
Sent: Friday, June 22, 2012 3:40 PM
To: PolySix@yahoogroups.com
Subject: [PolySix] Re: Problems KLM-367 clone

 

  

Thank's for your answer !

@philippe.69 :

I'm french. I'll check your website ;) I fixed the 2 first bugs (regarding
R98 and R52). What did you mean by : "Viewing ic 30.31, 21 can not be good"
? 

@backshall1 : I've got a 22pF capacitor. Here can you find some pictures :

http://imageshack.us/g/802/dscf1848t.jpg/

May it be possible for someone to give me a little functionnal schematic of
the KLM-367 ? I really want to know how this board works.





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

And 10p for C23 on the clone boards seems to work better for clock
stability.

Don B.

 

  _____  

From: backshall1 [mailto:backshall1@bellsouth.net] 
Sent: Friday, June 22, 2012 5:14 PM
To: 'PolySix@yahoogroups.com'
Subject: RE: [PolySix] Re: Problems KLM-367 clone

 

 

I noticed the "Test" switch is in backwards, so when you move the switches
towards "Norm", it will be in Test mode.

Don B.

 

  _____  

From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
tuk88@rocketmail.com
Sent: Friday, June 22, 2012 3:40 PM
To: PolySix@yahoogroups.com
Subject: [PolySix] Re: Problems KLM-367 clone

 

  

Thank's for your answer !

@philippe.69 :

I'm french. I'll check your website ;) I fixed the 2 first bugs (regarding
R98 and R52). What did you mean by : "Viewing ic 30.31, 21 can not be good"
? 

@backshall1 : I've got a 22pF capacitor. Here can you find some pictures :

http://imageshack.us/g/802/dscf1848t.jpg/

May it be possible for someone to give me a little functionnal schematic of
the KLM-367 ? I really want to know how this board works.





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

Wow ! Thank's a lot ! Everything work fine !

Just cause a noobie mistake...

The 10p give more stability, that's right ;)

Thank's a lot !


--- In PolySix@yahoogroups.com, "backshall1" <backshall1@...> wrote:

>
> And 10p for C23 on the clone boards seems to work better for clock
> stability.
> 
> Don B.
> 
>  
> 
>   _____  
> 
> From: backshall1 [mailto:backshall1@...] 
> Sent: Friday, June 22, 2012 5:14 PM
> To: 'PolySix@yahoogroups.com'
> Subject: RE: [PolySix] Re: Problems KLM-367 clone
> 
>  
> 
>  
> 
> I noticed the "Test" switch is in backwards, so when you move the switches
> towards "Norm", it will be in Test mode.
> 
> Don B.
> 
>  
> 
>   _____  
> 
> From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
> tuk88@...
> Sent: Friday, June 22, 2012 3:40 PM
> To: PolySix@yahoogroups.com
> Subject: [PolySix] Re: Problems KLM-367 clone
> 
>  
> 
>   
> 
> Thank's for your answer !
> 
> @philippe.69 :
> 
> I'm french. I'll check your website ;) I fixed the 2 first bugs (regarding
> R98 and R52). What did you mean by : "Viewing ic 30.31, 21 can not be good"
> ? 
> 
> @backshall1 : I've got a 22pF capacitor. Here can you find some pictures :
> 
> http://imageshack.us/g/802/dscf1848t.jpg/
> 
> May it be possible for someone to give me a little functionnal schematic of
> the KLM-367 ? I really want to know how this board works.
> 
> 
> 
> 
> 
> [Non-text portions of this message have been removed]
>