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

From: Alan Dicker <alanmdicker@yahoo.co.uk>
Date: 2012-03-08

I would only replace the chips as and when they fail unless you are a dab hand with removing ICs.  
You don't want to start lifting traces up where no work was needed.
Make a note of the orientation of the Bad Op-amp 'which pin is pin 1' de-solder the bad IC and pop a socket in place then place your new op-amp in there.
CP wont a TLo72 with CP is fine to use as are TL082 IC's they have the same pin outs.
If you ever unsure then type the chip number in to google and have a look for the data sheet to confirm compatibility.

From: dir_marillion <dir_marillion@hotmail.com>
To: korg_mono-poly@yahoogroups.com
Sent: Thursday, 8 March 2012, 17:57
Subject: [korg_mono-poly] Re: Monopoly VCO-4 prtamento/detuning issue

 
Hi Florian,

I bought 4x TL072CP chips, for a very low price.
I am not sure what is the CP at the end of the TL072.

∗∗∗ Please confirm (if you know) that this can be used ∗∗∗

Do you suggest to replace all the chips in all VCOs or only the onw on VCO4 ?

I will open my Monopoly tomorrow morning and I will let you know (I may be able to grab a couple of photos and post them somewhere, if needed, for future reference).

--- In korg_mono-poly@yahoogroups.com, Florian Anwander <fanwander@...> wrote:
>
> Am 08.03.2012 13:10, schrieb dir_marillion:
> >
> > Hi Florian,
> > Thank you very much. Is this TL072 on the same board as the HD14066BP ? Does it have a similar or I can order it as TL072 ?
> > Do I have to tune all of the VCOs then ?
> The TL072 is a standard chip you will get it at any electronics shop
> It is located on the VCO board close to Connector CN12
>
> Florian
>