Archive of the former Yahoo!Groups mailing list: Korg Mono/Poly

previous by date index next by date
previous in topic topic list next in topic

Subject: Re: [korg_mono-poly] Re: Monopoly VCO-4 prtamento/detuning issue

From: Alan Dicker <alanmdicker@yahoo.co.uk>
Date: 2012-03-09

A ha I see what you mean now.  Thought the first picture was your monopoly.  obviously not.  Very interesting nto seen that before.
I may have to pass this over to Florain great knowledge on the MP4 if there was a revision minus the KLM-398 where off set was trimmed else where?
I've not personally come across it before.  Or maybe it was possibly removed and never put back in for some reason.
If that is the case then what with it being a relatively simple board it may be possible have a strip board version built.

From: dir_marillion <dir_marillion@hotmail.com>
To: korg_mono-poly@yahoogroups.com
Sent: Thursday, 8 March 2012, 22:49
Subject: [korg_mono-poly] Re: Monopoly VCO-4 prtamento/detuning issue

 
Hi Alan,
Thank you very much for the info. I will check it tomorrow and will let you know.

The internal photo from my Mono/Poly is this: http://tinypic.com/r/141p7di/5 and there is not this brown pcb as you say. That's why I am asking you. I assume it is located somewhere between KLM-398 and the upper case of the instrument...

Thanks

--- In korg_mono-poly@yahoogroups.com, Alan Dicker <alanmdicker@...> wrote:
>
> Yes you can use TL072CP don't worry about the CP the number is right.
> Not sure what you mean by where is KLM-398.  Its right here in your picture.  The small brown board wit the 4 VRs on it.  You want to be looking at the board behind that the larger KLM-354 which is where IC10 that Florian mentioned is located.  You will need to remove the knob tops and nuts from the front panel and unscrew KLM-398 to see the other side of it where all the components are located.  You should then be able to locate and remove IC-10.  I very much doubt it is already in a socket unless is has been repairs before.  Usually these very common op-amps aren't socketed as standard but things like the SSM 2033 VOC chips usually are.  I find a good thick solder wick to be my preferred method of de-soldering components.  If you are unsure on your solder skills then either get a professional to do it or find some old electronic junk boards and practise removing and re-soldering components from those until you have the skill to do it well.
>
> Alan
>
>
>
> ________________________________
> From: dir_marillion <dir_marillion@...>
> To: korg_mono-poly@yahoogroups.com
> Sent: Thursday, 8 March 2012, 22:08
> Subject: [korg_mono-poly] Re: Monopoly VCO-4 prtamento/detuning issue
>
>
>  
> Sorry to correct my previous post.
> I mean where is the board KLM-398 to my board ?
> According the picture I sent in my first post, it is not where it should be.
>
> --- In korg_mono-poly@yahoogroups.com, "dir_marillion" <dir_marillion@> wrote:
> >
> > Hi,
> > I did not understand if Alan meant that I can use the TL072CP or not or I have to buy another chips which are only TL072 and not CP.
> >
> > I will open the Mono/Poly tomorrow and will see what I can do. Then I will let you know. If it is in a very complicated place I will not do it. If I am lucky enough and the chip is already plugged to a stand, I will replace it immediately :-)
> >
> > Really, where is the pcb KLM-354 to my revision board ? (check the picture I linked on my first post).
> >
> > Alan and Florian, I really appreciate your effort to help me.
> >
> > --- In korg_mono-poly@yahoogroups.com, Florian Anwander <fanwander@> wrote:
> > >
> > > Hi
> > >
> > > Florian Anwander wrote:
> > > > [everything Alan has written already...]
> > > Sorry, I had not seen, that Alan wrote everything already. I dod not
> > > want to double it.
> > >
> > > Florian
> > >
> >
>