Electronic Repairs on Hollowbody Guitars

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Electronic Repairs on Hollowbody Guitars

collings

This beautiful Collings I30 guitar came to us with a non-functional neck pickup tone control. While this is likely a simple repair electronically, as with most wiring repairs on semi-hollow and fully hollow-bodied guitars, the more time consuming task will be accessing and reinstalling the electronics before and after service.

Fishing The Electronic Out Of The Body

As we have previously mentioned in our article about replacing hollow body output jacks, Hollow-bodied guitars typically do not have and easily accessible control cavity. Rather than a removable pickguard like a Fender Stratocaster or a control plate such as a Fender Jazz Bass, the electronics on these guitars must be fed in and out through either the pickup cavity or the instrument’s F- hole.

After removing the mounting nuts and washers and unscrewing the bridge pickup, we carefully pull the wiring harness out for examination.

Wiring Harness Removed For Inspection

Since the pickups and string ground wire are still attached, the work will have to be performed on top of the instrument’s body.  Here we are using a retired polishing cloth to protect the top from damage.

Testing To Find A Bad Capacitor

After observing that all the connections appeared visually solid, we tested the Jupiter “vintage tone” capacitor and found that it was defective. If within spec, this particular capacitor should read about 20nF on the meter;  A reading of 0.18 is way out of range.

New Capacitor Installed

After a quick bit of soldering, we’ve got the new capacitor installed and the tone control is working great! Now, before we can call this done, the electronics must be carefully reinserted through the pickup cavity and mounted in their former position. 

Reinstallation can be a bit fiddly since there is limited space with which to manipulate the parts back into position and one must take care not to damage the instrument body or any of the wiring work, which would then require its re-removal. There are a few different techniques for this; For us, nimble fingers and curved tipped forceps are the tools of choice.  

About Guitar Repair Long Island

Guitar Repair Long Island is the area’s premier destination for fretted musical instrument care and maintenance. Led by owner/head technician Erik Salomon, the shop is dedicated to providing quick, honest, and reliable service. Our vast experience in all aspects of instrument repair ensures that we can help with whatever your needs are. Contact us with any questions or book your appointment today.

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