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Vintage Synth Repair

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Yamaha V50 EPROM sizes?

Yamaha V50 EPROM sizes?

2011-04-06 by GB

I'm trying to burn some ROMs for the V50 from some chips (files) I read many moons ago. I don't remember what the parts in the unit are. There should be a Main A and a Main B EPROM that is possibly 1Mbit ... 128k x 8? 64k x 16? And a smaller Sub EPROM that I think is a 27256 type. Does anyone have this info?? Or maybe service notes or a schematic?
Thanks,
GB

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