Korg SV-1 How to replace broken keys and change the built-in vacuum tube in a Korg SV-1 stage piano.
The Korg Kronos, M3-88 and M50-88 use the same keybed as the SV-1.

Vox Valvetronix PotsHow to replace broken pots in a Vox Valvetronix guitar amp.

Casio Privia Power Jack How to replace a broken power jack in A Casio Privia PX-130 keyboard.
This power jack is also used in Korg keyboards like the King Korg, Krome and M-50.

Roland Juno-60 Battery How to install a suface-mount battery holder and fresh battery in a Roland Juno-60 synthesizer.

Minimoog Key Bushings Key bushings dry out and crumble over time, causing mechanical noise and poor keyboard action.  This story fixes that.

Korg Triton Buttons How to replace worn-out tactile switches in a Korg Triton workstation.

Ampeg SVT Classic This Ampeg SVT-CL bass amp would shut down quickly after turning it on.  What was the fault?

Fender Hot Rod DeVille How to remove & replace a broken input jack on many Fender 1988 to 1999 guitar amps.

Farfisa Mini-Compact Repair This vintage compact organ had problems with the circuits that divide down the top octave into the lower octaves.

Marshall JCM2000 DSL100 We change the output transformer and add a filter choke to this Marshall DSL100.

Micromoog Repair This little monophonic synth, made between 1975 & 1979, has a really fat, patented sound and is sturdy and easy to use.

Korg X3 How to remove & replace the old floppy-disk drive belt that keeps the X3 drive from being "ready":

Peavey 6505+ Guitar Amp A fried interconnect prevented the output tube filaments from heating up.  The Peavey 5150 has had the same problem.

Yamaha MOTIF How to replace worn-out tactile switches in a Yamaha MOTIF keyboard.