Vintage Synth Repair

Yes, it's an opamp, just an ordinary RC4558 it seems.
It's not the best out there, so you could get an OPA2134 instead.

As for the transistors, the best is to look at the specs to find a 
suitable replacement if the original can't be found.
You're looking for 2SC1815, 2SA1015, 2SA970, 2SC2240.

pcbye111 a \ufffdcrit :
>
> Greetings:
>
> Can anybody give me a cross reference for a "4558DV" I am pretty sure
> it is an Op Amp. It is used in a Yamaha ML7A Mic Mixer.
>
> It is a tough one to find.
>
> There are also some transistors that I am having difficulty finding a
> cross reference for if anybody has one, plese let me know.
>
> C1815 Transistor
> A1015 Transistor
> A970 Transistor
> C2240 Transistor
> 4558DV Op Amp
>
> Peter
>