- Alexander Publishing Synth Guides
 
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Instructional books and tutorials for a number of older Alesis, E-Mu, Ensoniq, Korg, Roland and Yamaha keyboards.
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- AmpParts.com
 
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Sell a wide range of Korg parts and manuals.
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- AMS - Analog Synth Manuals
 
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Analogue Modular Systems provide manuals for many vintage synths including Aries, ARP, EMS, Chroma Polaris, MOOG, Oberheim, 
Roland, Yamaha, Korg & Sequential Circuits.
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- Bleeps-And-Peeps
 
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Provides Owner Manuals, Schematics ,Service Manuals and Sysex/Wav files for synths and keyboards.
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- Bluesynths
 
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Reviews, manuals, pictures and info for a range of synths. Plus MP3 sound demos are available.
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- E-Music DIY Manuals Archive
 
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Service manuals and schematics available to download for a number of vintage synths.
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- Fender - Mr GearHead
 
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Provides schematic diagrams for Fender keyboard amps as well as other Fender amps and guitars. This really is a 
great site if you are also into guitars.
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- Fdiskc Manual Archive
 
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A very nice archive of owner and service manuals for older synths presented by Fdiskc. 
Also has synth pics and ad brochures available.
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- Lojinx
 
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A good collection of manuals for analog synths.
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- Midimanuals
 
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Free manuals for many synths.
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- Midiworld
 
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Provides specs and documentation for a number of recent synths including Korg, Yamaha and E-Mu/Ensoniq.
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- MusicPlanet PDF Archive
 
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A large archive of manuals for music gear. The hard part is working out what you want because the 
filenames don't indicate it.
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- Museum Of The Soviet Synths
 
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A very good website that documents Russian vintage synthesizers and also provides manuals and schematics for some of them.
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- Online Manual Archive
 
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OMA has some links to manuals and schematics available online.
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- manuals-in-pdf.com
 
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Sell service manuals in PDF format.
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- Mark Glinsky's Private List
 
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Mark is a private collector of many rare manuals and is able to provide copies for a fee.
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- Professional Sound & Music
 
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Sell schematics and service manuals for pro audio gear.
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- Retrosynth Document Library
 
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Have a collection of vintage synth service manuals and documents.
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- Rogue Music Manuals
 
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Rogue Music provide manuals for many synths.
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- Route 66
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Sell parts and manuals and now introducing repair services for many Ensoniq, E-Mu, Alesis and Roland 
synthesizers. Wooden ends for many older synths and samplers are also now available.
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- Roland
 
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Roland have made user manuals for their products available online.
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- Schematic Connection
 
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A personal schematic collection built up over 30 years covering a wide range of synthesizers 
and other music electronic gear. There is a list of all available schematics.
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- Syntaur - Ensoniq Manuals
 
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Syntaur can supply accessories and owner manuals for Ensoniq equipment.
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Synthdiy.com
 
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Manuals, schematics and info on many classic synths.
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- Synthesized Dreams
 
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Includes an archive of some patch sheets and manuals for gear including the SCI Six-Trak, 
the Roland Alpha Juno, CSQ-100 and PG-300 programmer
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- Synthesizer Of Schematics
 
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Schematics and auto calibration for many brands of synths. Be warned there are popups with this website. 
Service manuals are also available for sale.
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- Synth Services
 
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Various service schematics and bulletins online.
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- Synat
 
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A collection of synth manuals in German.
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- Synthman
 
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A large collection of manuals for synths.
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- Synthfool
 
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A variety of vintage synth manuals and documents available. 
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- Synti Groep
 
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More than 20.000 synth and audio manuals available for sale. Available in many languages including Dutch, English, French, German, Japanese, Spanish, Italian and more.
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- Vintagesynth Manual Page
 
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Vintage Synth Explorer had links to some manuals available online including the 
Korg M1, Access Virus, Roland Juno 106, JX-3P, TR-909, TB-303, PG-300 and SH-101.
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- Yamahasynth.com
 
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Yamaha web site dedicated to its range of synths. Support files are available including 
many users manuals 
in Acrobat PDF format.
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