Gibson 1934-L5, Owner'S Manual

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up (front position), the middle and back pickup together (middle position), and the
back pickup (back position).
The Tune-o-matic Bridge.
The Tune-o-matic bridge allows for adjustment in overall bridge
height and individual string length. Height is adjustable up and down by means of
thumb nuts under the bridge at either end. Each string saddle is adjustable forward
and back with a small standard screwdriver. Action adjustment (up and down) is set at
the factory to the correct height for playing comfort and for buzz-free action. Raising
the bridge will result in stiffer action; lowering the bridge will result in faster action but
may also result in fret buzz. Climatic or humidity changes, or changes in string gauge,
may necessitate a bridge adjustment.
Any change – in bridge height, string gauge or climate – can affect the intonation and
cause a guitar to play out of tune in some fret positions. When this happens, the string
length needs to be adjusted, and this is accomplished by moving the individual sad-
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