Vintage Synth Repair

So, if it's an 8 pin dip one, this could be a LM741... !

If you're not sure, try to do some minor reverse-engineering, it may be quite
easy finding out the power supply pins first (V+ = pin 7 and V- = pin 4 on the
741), then, you should find some basic structure around it, so you can verify
if it can be an LM741 or not.

The complete 741 pinout may help you...

> Thanks,
>
> Well, I found that it is not the opamp. Actually, aside from the
> 4053, there's also an IC tagged "C741C" in at the same circuit -
> would that one be hard to find ? any equivalents ?
>
>
>
>
> --- In vintagesynthrepair@yahoogroups.com, no.freq@... wrote:
> >
> > Hi,
> >
> > You'd better use a TL082 instead of the 072. You'll usually find
> that the right
> > replacement op amps will end with the same numbers.
> >
> > Concerning the 4053, I bet it's a CD4053, so you may not have any
> problems in
> > finding one.
> >
> > And one last good thing, while you're at desoldering chips: use
> (golden) sockets
> > !
> >
> > Cheers,
> >
> > Michel
> >
> > > Hi all,
> > >
> > > I'm trying to fix my OB Matrix6R, on which the left channel
> doesn't
> > > play. The last stage is a NEC C4082C dual opamp (datasheet
> attached to
> > > Files section).
> > >
> > > I wonder whether it is possible to replace it with a 4558 or a
> TL072
> > > opamp, safely ?
> > >
> > > There is also one 4053 that I suspect. In case I need to replace
> it,
> > > what could be a good substitue for it in case it can't be found ?
> > >
> > > Thanks for any advice.
> > >
> > >
> > >
> > >
> >
>
>
>