Yamaha disklavier DKC55 Wartungshandbuch - Seite 17

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[Curve of change in the beam amount]

Beam amount

Rest

End

3. Key Drive Unit

This unit utilizes high-power high-efﬁciency solenoids. The new design provides high thrust while con-

suming only 2/3 the power required by its predecessor, allowing for a wider dynamic range.

4. Ampliﬁer Unit

This unit provides the main switch and the master-volume and tone-control knobs, and is used to adjust

the sound output from the speakers. Setting the master volume to 0 switches off sound from the XG

generator and (in silent mode) from the piano generator, and disables control of volume from the con-

trol box and switch box.

The shank stopper's drive motor (MD unit) is mounted on the right rear of the key bed. The motor

drives both the shank stopper and the regulating rod.

The regulating rod is attached to the hammer rail (at the front of the regulating button). The regulating-

rod adjustment screws are accessible from the front. For more information, refer to "Maintenance"

below.

A response curve that is measured and stored on the

sensor sheet during manufacture of the key sensor unit.

Open

Rest

Beam amount that is measured at Open, Rest, and End locations

after the sensor unit is installed into the piano

2.7m/m

4.5m/m

6.3m/m

8.1m/m

10m/m (Key Stroke)

End

Beam closing distance