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First: diagnosis of the fault. With test tools such as an Oscilloscope, transistor tester, general AmpVoltOhm and logic analyser, most faults can be identified. Sometimes it can be hard to source replacement parts, particularly when they are mechanical or electronic components designed for a specific machine that ceased production perhaps 30 years ago!

Electronics designed in the 1970’s and 1980’s are typically repairable where components can be obtained, newer equipment, especially items with surface mount micro components sometimes can only be repaired if replacement circuit boards are available.


Power components and basic mechanical problems are more straight forward. Cheaper items such as effects sometimes are impossible to repair when build quality is poor or units are sealed.


An anti-static workshop area great care with beloved and sometimes very valuable items is essential. I’m happy to discuss or review any item and likelihood of success, free of charge, within reason!

A selection of analogue synthesizers - got one of these?


Akai: AX60, AX73, AX80, VX600, VX90

ARP: Odyssey 1, Omni Mk 1, Quadra, Quartet, Solina String Ensemble, Solina String Synthesizer

BOSS: DR-110 Dr. Rhythm, DR-55 Dr. Rhythm

Buchla: 400 Series, 700 Series, Touch&eacute

Casio: CT-101, CT-401, HZ-600,

Cheetah: MS-6, Con Brio, Con Brio ADS 200

Crumar: Bit 01, Bit 99, Bit One, DS-2, Multiman-S, Performer, Stratus

E-mu: Audity

Electronic Music Studios (EMS): Polysynthi

Elka: EK-22, Synthex,

EML: ElectroComp 100, ElectroComp 101, Poly-Box

Ensoniq: ESQ-1 

Farfisa: Soundmaker

Formanta: Polivoks 

Gleeman: Pentaphonic 

Kawai: SX-210, SX-240

Korg: 900PS Preset Synthesizer, Delta, DSS-1, DW-6000, DW-8000, KPR-77, Lambda ES50, Maxi-Korg 800DV, MiniPops 35 (MP-35), Mono/Poly, Poly-61, Poly-800, Polyphonic Ensemble P, Polyphonic Ensemble S, PolySix, PS-3100, PS-3200, PS-3300, Rhythm 55 (KR-55), Trident, VC-10 Vocoder,

Logan / Hohner: String Melody II


Moog: Memorymoog, Opus-3, Polymoog 203a, Sonic Six


Oberheim: Eight Voice, Four Voice, Matrix 1000, Matrix 12, Matrix 6R, OB-8, OB-SX, OB-X, OB-Xa, Two Voice, Xpander

Octave: The Cat, Plateau, Plateau Voyetra 8

Powertran: Transendent DPX

PPG: Realizer

Rhodes: Chroma, Chroma Polaris


Roland: Alpha Juno 2, Alpha Juno-1, CMU-800, CR-68, CR-78, CR-8000, GR-700,  HS-60, Juno-106, Juno-6, Juno-60, Jupiter-4, Jupiter-6, Jupiter-8, JX-10, JX-3P, JX-8P, MKS-10, MKS-30, MKS-50, MKS-7, MKS-70, MKS-80, Rhythm 330, RS-09, RS-101, RS-202 Strings, RS-505 Paraphonic, SH-7, SVC-350 Vocoder, TR-606, TR-66, TR-808, TR-909

Sequential Circuits: DrumTraks, Fugue, Max, MultiTrak, Prelude, Prophet 10, Prophet 5, Prophet 600, Prophet T8, Six-Trak, Split-8


Siel: Cruise, DK600, DK70, DK700, DK80, Opera 6,Orchestra


SoundMaster: Memory Rhythm SR-88, Stix ST-305


Teisco: SX-240, SX-400, Synthesizer 110F

Waldorf: Microwave


Yamaha: CS-40m, CS-50, CS-60, CS-70m, CS-80, GX-1, SK20, SS30 




Aries: 300 Music System

ARP: 2500, 2600, Avatar, Axxe, Explorer I, Little Brother, Pro-Soloist, Pro/DGX, Solus


BOSS: HC-2 Hand Clapper, PC-2 Percussion Synthesizer


Buchla: 200 Series


Crumar: Spirit


Davoli: Davolisint


E-mu: Modular Systems


EKO: EKOsynth P15,


Electro Harmonix: Mini-Synthesizer


Electronic Dream Plant (EDP): Gnat, Wasp,

Electronic Music Studios (EMS): Synthi A

Elka: Soloist 505

EML ElectroComp: 400/401, 500, SynKey


FBT Electronica: Synther-2000

Hammond: 102200

Jen Electronics: SX-1000 Synthetone, SX-2000 Synthetone

Korg: 770, M500 Micro-Preset, MiniKorg-700, MS-10, MS-20, MS-50, SB-100 Synthe-Bass, Sigma, X-911


Moog: Liberation, Micromoog, Minimoog, Minitmoog, Multimoog, Prodigy, Rogue, Satellite, Source, Taurus I, Taurus II, Vocoder


Oberheim: OB-1, SEM 

Octave: The Kitten


Oxford Synthesiser Company: OSCar


PAiA: Proteus 1


Powertran: Transcendent 2000


Realistic: Concertmate MG-1


Roland: CMU-810, GR-500, MC-202, ProMars MRS-2, Saturn 09, SH-09, SH-1, SH-1000, SH-101, SH-2, SH-2000, SH-3a, SH-5,  System 100, System 100m, System 700, TB-303


RSF: Kobol Expander, Modular Model 11


Sequential Circuits: Pro One


Serge: Modular


Siel: Mono


Steiner-Parker: Minicon, Synthacon, SynthaSystem


Studio Electronics: Midimoog

Synton: Syrinx


Teisco: S100P, Synthesizer 110F, 100F


Triadex: Muse


Vermona: Synthesizer


Wersi: Bass Synthesizer


Wurlitzer: Orbit III


Yamaha: CS-10, CS-15, CS-15D, CS-20m, CS-30, CS-5, CS01, ED10, SY-1, SY20

Welson: Syntex

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