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楽器 Yamaha TRBX174のPDF オーナーズマニュアルをオンラインで閲覧またはダウンロードできます。Yamaha TRBX174 12 ページ。 Electric bass
Yamaha TRBX174 にも：オーナーズマニュアル (11 ページ)

When the string gauge and/or bridge height is changed, or the

truss rod is adjusted, it is usually necessary to reintonate the

bridge saddles. If the bass plays out of tune in the higher regis-

ters, this adjustment is needed. Check each string in the following

way:

To check intonation, compare the harmonic tone (12th fret) to

the fretted tone (12th fret). Because the 12th fret is the midway

point between the nut and the bridge, a harmonic tone one octave

higher than the fretted tone can be generated. This is done by

barely touching the string directly above the 12th fret (left hand)

and simultaneously plucking the same string (right hand). If the

fretted tone is exactly the same pitch as the harmonic tone, no

adjustments to the bridge saddles are necessary. However, if the

fretted tone is higher in pitch (sharp) or lower in pitch (flat) than

the harmonic tone, apply the appropriate adjustment as shown

below. Repeat the same procedure for each string.

INTONATION ADJUSTMENT

If the fretted note is pitched higher than the harmonic, turn the

corresponding saddle adjustment screw clockwise, increasing the

active string length.

Conversely, if the fretted note is pitched lower than the harmonic,

turn the corresponding saddle adjustment screw counter-clock-

wise, reducing the active string length.

When lower

than harmonic

When higher

than harmonic