1985 Roland JU-1 Alpha Juno-1 Synthesizer Repair

A project that went in with the intention of a few 'quick fixes' and ended up being several days of 'clean 38 years of grime out of it' and while I was in there, a new OLED screen, new ROM and new battery. There's no real demos here - I'll save that for another time and there's plenty online already; this just covers the trials of the repair and restoration process.

Couldn't have done this without a few incredible resources:

Llamamusic pages:
http://llamamusic.com/mks50/mks-50_in...

R-Massive pages:
http://zine.r-massive.com/roland-alph...

Info about EPROM types:
https://forum.vcfed.org/index.php?thr...

Jim Atwood's page for some info about backing up patches
https://jimatwood.wordpress.com/2012/...

Datasheet for the original Sharp LCD display:
https://www.hobbielektronika.hu/forum...

Datasheet for the Winstar display used:
https://www.farnell.com/datasheets/36... (got mine from CPC:
https://cpc.farnell.com/winstar/weh00...)