Yamaha SY77 Clean / Repair / Restore
1:01:10
DX7s Repair (not just a battery change)
12:15
SY99 Drive belt replacement ConvertII
38:19
YAMAHA MUSIC SYNTHESIZER SY77 【完全版】
15:59
Reparacion roland d50 enciende pero no inicia el sistema. Solo prende luz upper y luz de pantalla
20:36
Yamaha SY99 Demo by MeX (Subtitles)
12:47
Yamaha V50 FM Synthesizer destined for the scrapyard
46:42
Yamaha SY77, TG77, SY99 LCD replacement
39:34