Mystery Circuits, LLC
By Mike Walters - Chapel Hill, North Carolina
Featured Repairs
All repairs are performed at my shop in Chapel Hill, North Carolina.
$50/hour, $35 minimum bench fee that will go towards the first hour
7.5% NC Sales tax applied to all local orders, including labor
Forms of payment: Cash, Paypal, credit card through Square, or Zelle
**Paypal has a 3.7% fee and Square credit card payments have a 3% fee added to bill
Mystery Circuits, LLC
Synth Repair Services
I repair old Synthesizers, Drum Machines, Combo-Organs, Sequencers, Electric Pianos, Samplers, etc. Mostly ones made from the 1960s, until the 1990s, though there are some exceptions.
Repair Photo Galleries
Rates
Process
-Contact me to inquire about setting up a repair. If it’s something I’ll take on, there’s usually a bit of a wait before it can be brought in. I keep a running list of repair requests, and I try to get them in as quickly as I can. If you don’t hear from me after awhile, please check back with me.
-If the repair is simple, or urgent, I’ll take it in sooner. Please let me know if the repair needs to be expedited, and I’ll try my best to accommodate. Simple repairs, like fixing a broken key, repairing velocity on a certain key, I try to turn around right away.
-Big repairs, such as restorations, complex repairs, or fixing something that has been attempted to be fixed might take awhile before they can be brought in.
-I don’t do any warranty repairs, or house calls. For new items that might be under warranty, best to contact the manufacturer about service. I sometimes do authorized work if the manufacturer gives support, provides parts, and allows it.
Dropping off or picking up is by appointment only. I’m around Mondays through Fridays, between 10am and 5pm. I can sometimes accommodate weekends, or off hours, if I am available.
What I Repair:
Older Stuff
-Synthesizers from the 1970s and 1980s (Moog, Roland, ARP, Yamaha, Sequential Circuits, Korg, Oberheim, Crumar, and more)
-Combo Organs from the 1960s and 1970s (Farfisa, Vox, Ace-Tone, etc)
-Drum Machines and Rhythm Boxes from the 1960s to the 1980s (Roland, Linn, Elka, Emu…)
-Electric Pianos (Rhodes, Wurlitzer)
Newer Stuff
-Synthesizers from the 1990s and 2000s, if schematics and parts are available (Roland, Yamaha, Nord, Korg, etc)
-Digital Pianos (Yamaha P series, Korg, Roland, Casio)
Occasional Stuff
-Accordion mic system installation
-Four Track cassette recorders
-Effects Processors
-Random Stuff… non-musical instrument solder fixes, etc.
What I Don’t Repair
-Most console organs
-Acoustic Pianos
-Guitar Amps
-Guitars
-Microphones
-Bass Amps
-Tube Amps
-PA systems
-Mixing Consoles
-Reel to Reel
-Cassette Tape Decks
-AV, Lighting components, DJ gear
-Stereo equipment
-Consumer Electronics
-Speaker Cabinets
-Newer digital processors
-Hi-Fi consoles
-Computers/Laptops/Phones or accessories
-Car Stereo equipment
Some common procedures: Calibration, key replacement, cleaning and restoration, power supply recapping, internal battery replacement, backlight replacement, replacing disk drives with USB drives, etc.
I also do general troubleshooting, repair, and restoration on old keyboards, drum machines, and effects processors.
I do custom work and modifications to synthesizers and drum machines. I do a lot of Tubbutec, Kenton, and install other well known upgrades that add MIDI and extra features to old gear. I can usually perform custom modifications, if a schematic is available.
You can ship to me if you're out of town. Get in touch to set something up!