Discussion about the Korg PolySix synthesizer

Hello all, i hjave just fitted my polysix witch i bought for  300SEK
or 30 Euro with a new battery and i'm planning to change the opto as
well to get the tuning problem away.
I've got all the parts but i would like som information on how to fit
the new part (vtl5c3) to the board.

Could anyone give me a fairly detailed description on how to attach it?

I.e. what pin goes where and so on.

Thank you all.

Monke