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9

TRUSS ROD ADJUSTMENT

PICKUP HEIGHT ADJUSTMENT 

The curvature of the neck should be slightly concave. 
Clockwise rotation of the nut tightens the rod and corrects for 
too much concave bow. Counterclockwise rotation of the nut 
loosens the rod and corrects for too much convex bend. Make 
any adjustments gradually. Allow five to ten minutes for setting, 
and check the curvature after each 1/2 turn of the truss rod 
nut.

The height of the pickup (i.e. distance from the strings) affects 
gain — the higher the pickup, the louder the sound, and vice 
versa. If the pickup is set too high, sustain and playability will 
suffer because of the magnetic pull on the strings. Adjust over-
all height using the screws located at either side of the pickup. 
If the pickup has individually adjustable polepieces (most hum-
buckers do), these can then be adjusted to achieve the best 
overall balance. The polepieces should normally be about 2 or 
3 millimeters from the strings. 

NOTE:

 Unless you have experience with truss rods, we sug-

gest that you entrust this adjustment to your dealer.

If too much 
convex bend

If too much 
concave bow

concave  

convex

Single-coil Pickup

Height adjustment screw 

Adjustable polepiece

Humbucking Pickup

Height adjustment screw 

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Summary of Contents for ERG121C

Page 1: ...INTENANCE 2 TUNING MACHINE TENSION ADJUSTMENT 3 HEIGHT ADJUSTABLE LOCKING NUT 3 SETTING THE STRING ACTION 4 VIBRATO SYSTEM Vintage Type 5 VIBRATO SYSTEM Locking Type part 1 6 01 e g om en indd 1 01 e...

Page 2: ...or disconnecting cables turn off the am plifier and other equipment or reduce the volume After playing wipe the entire guitar down including strings with a good polishing cloth This will remove corro...

Page 3: ...Height Adjustment Screw The Nut Base gets higher by clockwise rotation and lower by coun terclockwise rotation illustration C Clockwise screw rotation tightens the machine The tuning ma chines should...

Page 4: ...ty String height is adjusted with the bridge and or the saddle on the bridge Adjust height by alternately turning the screws little by little on the left and right sides Set too high and the instrumen...

Page 5: ...pitch is higher than harmonic saddle must be moved backward to lengthen string If fretted pitch is lower than harmonic saddle must be moved forward to shorten string When Higher than harmonic When Low...

Page 6: ...each string illustration B After locking the strings make sure that the fine tuning thumb screws are in the middle of their range of travel il lustration C 5 Tune the guitar to the correct pitch 6 Rem...

Page 7: ...2 Slide the saddles by hand to adjust the length of each string 3 When the intonation is correct tighten the hexagonal screw in front of each saddle to ensure that its position stays sta tionary illu...

Page 8: ...ures are 1 Remove the screws that attach the tremolo cavity back plate from the back side of the guitar exposing the claw springs 2 Make sure that the guitar is tuned to proper pitch 3 If the bridge i...

Page 9: ...ickup is set too high sustain and playability will suffer because of the magnetic pull on the strings Adjust over all height using the screws located at either side of the pickup If the pickup has ind...

Page 10: ...ose of them as minor chemical waste CORRECT USE AND HANDLING OF BATTERIES When changing batteries pay close attention to the polarity markings as shown in the illustration above Battery 6LR61 9V S 006...

Page 11: ...instrument drop ping etc or injuring persons close by Do not place your face close to the instrument when changing or adjusting the strings Strings may suddenly break causing injuries to eyes etc It c...

Page 12: ...operly adjusted before being shipped from the facto ry In the event adjustment is necessary contact the dealer from whom you purchased the instrument if possible as special skills may be required For...

Page 13: ...ia s p a Viale Italia 88 20020 Lainate Milano Italy Tel 39 0 02 93577 1 Fax 39 0 02 937 0956 LATVIA Yamaha Music Europe GmbH Sp z o o Oddzia w Polsce Branch Poland ul 17 Stycznia 56 PL 02 146 Warszawa...

Page 14: ...n of America Guitar Service Department 6600 Orangethorpe Ave Buena Park Calif 90620 U S A Tel 714 522 9011 Yamaha Canada Music Ltd 135 Milner Avenue Scarborough Ontario M1S 3R1 Canada Tel 416 298 1311...

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