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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
> >
>

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