Yamaha SY77 Clean / Repair / Restore
1:31:55
TrueFire Live: Andy Timmons
12:34
The Tragic Decline Of Firefox...What Happened?
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DX7s Repair (not just a battery change)
14:52
SY99 screen and battery replacement, short sound demo
39:34
Yamaha SY77 Clean / Repair / Restore (No Commentary)
12:43
Yamaha DX7, TX81z, SY35 and SY77: The Ultimate Review
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YAMAHA MUSIC SYNTHESIZER SY77 【完全版】
22:07