User manual YAMAHA ACOUSTIC GUITAR GENERAL

[. . . ] Please understand each of the cautions and use the instrument in a safe and proper manner. Preventing Electrical Accidents Tuning Machine Tension Adjustment The tuning machines have spring-loaded mechanisms which automatically take up wear, preventing backlash. However, it is possible to adjust the amount of pressure required to turn the machines. [. . . ] And when cleaning the headstock, be careful not to injure yourself on the sharp string ends. Tighten Loosen Be Careful When Handling and Other Cautions Clockwise screw rotation tightens the machine. The tuning machines should be adjusted to the extent that they are firm, but can turn smoothly. This adjustment is normally unnecessary, and excessive tightening can lead to premature tuning machine wear. The guitar has been properly adjusted before being shipped from the factory. In the event adjustment is necessary, contact the dealer from whom you purchased the instrument, if possible, as special skills may be required. For those adjustments that can be performed by the owner, please closely follow the instructions given in the Owner's Manual for the procedure. When playing the instrument, pay attention to the volume level. Especially late at night, take neighbors and those who are close by into consideration. Broken guitar necks are mostly the result of accidents such as dropping the guitar, the guitar falling over, or from shocks occurred during transport. When the guitar is not being used, make sure it is kept on a sturdy stand where it won't fall over, or place it in its case. Do not treat the instrument in a rough manner like throwing objects at the instrument, dropping the instrument, etc. And do not put excessive force on the switches or control knobs, etc. Doing so can result in damage. When connecting or disconnecting the cable, make sure the guitar amplifier's power is switched OFF, or the amplifier's volume is turned all the way down. [. . . ] Allow five to ten minutes for setting, and check the curvature after each 1/2 turn of the truss rod nut. If too much convex bend If too much concave bow If too much convex bend If too much concave bow Using Batteries Properly For guitars that use a battery, make sure that only the specified battery is used and it is installed with its polarity markings aligned properly. On guitars that require two or more batteries, do not mix new batteries with old. [. . . ]