Yamaha SGV Series Owner's Manual - Page 5

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Make sure guitar is tuned to pitch before making adjustments to the truss rod.

The curvature of the neck should be slightly concave. The practice of

sighting down the neck to see whether there is a bow or bend is unreli-

able, and even experienced bass technicians can be misted by optical

illusions. A better method to check for proper curvature is as follows:

Step 1: Tune strings to proper pitch, and depress the strings by placing a

capo directly behind the first fret. The capo should be just tight

enough to effectively create the tone of F when plucking the E string.

Step 2: Depress the E string directly behind the 16th fret with your left hand

index finger. The E string depressed at opposite ends of the finger-

board acts as a straightedge, allowing measurement of the space

between the fret tops and the E string.

Step 3: Measure the mentioned space at the 7th fret by inserting the appro-

priate feeler gauge blade (right hand). If the mentioned space is less

than 0.15mm, or greater than 0.40mm insert the hexagonal truss rod

wrench into the truss rod nut and turn in increments of a 1/4 turn or

less towards the appropriate direction as shown in the drawing.

Truss Rod Adjustment Procedure

NOTE

Unless you have experience with truss rods, we suggest that you

entrust this adjustment to your dealer.

concave

convex

Increases

mentioned space

Truss rod

Decreases

mentioned space