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Vintage Synth Repair

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Philip Rees 2M MIDI Merge

Philip Rees 2M MIDI Merge

2016-05-23 by kloopy@...

Hi, I'm trying to make one 2M merge unit out of two faulty ones. I also have another fully functional one.

Does anyone have schematic to share or provide some tips?

I have logic analyser on disposal so could troubleshoot that way. I just need a bit of guidance on what to look for first.

It is relatively simple 6803 based circuit with MC6830P, EPROM and SRAM 6116.

Thanks for any input!

K


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