Casio PX-130 Service Manual & Parts Manual page 26

<Installing the hammers>
Be sure to install each hammer at its designated location. If a hammer does not move smoothly, check
if it is installed at the correct location.
Follow the same procedures shown below to install a hammer for both black and white keys.
1. Use the tweezers to set a hammer at its correct location.
2. Press the chassis with the tip of tweezers.
3. Using the chassis-tweezers contact as a fulcrum point, press down the metal part of the hammer in
the direction of the red arrow in the illustration below, and then install the hammer.
NOTE: When installing, do not damage the felt.
Press down against the metal part.
Locked at this point
Fulcrum point
Be careful not to damage the felt.
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Tweezers