Vibrato System Locking Type (Part 1) - Yamaha ERG121C Owner's Manual

When changing strings it is necessary to cut off the ball ends
of the strings.
Following is the procedure for changing strings and adjusting
the vibrato system:
1) Using the supplied hexagonal wrench, loosen the three hex-
agonal screws on the lock above the nut. (illustration — A)
2) Loosen the individual string locks using the supplied hex-
agonal wrench. (illustration — B)
3) Replace the old strings with new strings.
4) Using the hexagonal wrench, lock 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) Remove the back plate to gain access to the vibrato strings.
Three springs are factory installed and we recommend that
these springs be adjusted so that the vibrato bridge plate
is parallel to the top of the guitar when it is tuned to correct
pitch.
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VIBRATO SYSTEM Locking Type (part 1)

7) Lock the strings above the nut. (illustration — A)
8) Use the fine tuning thumb screw to tune the guitar to the
correct pitch. (illustration — C)
6
Loosen
A
Tighten
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