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Yamaha GranTouch GT20 User Manual

Yamaha GranTouch GT20
116 pages
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HYBRID PIANO PRODUCT HANDBOOK
FOR THE PIANO TECHNICIAN
MHB19
00.08 CR Printed in Japan

Table of Contents

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Yamaha GranTouch GT20 Specifications

General IconGeneral
TypeDigital Piano
Keyboard ActionGraded Hammer Action
Voices Count10
EffectsReverb, Chorus
RecorderYes
SpeakersYes
AmplifierYes
Keyboard88 keys
Sound EngineAWM (Advanced Wave Memory)
Sound SourceStereo Samples
Polyphony64 notes
Speaker Size16 cm x 2
Amplifier Power20W
PedalsDamper, Sostenuto, Soft
MIDIIn/Out
ConnectivityMIDI In/Out
FinishPolished Ebony

Summary

Controller Types and Specifications

MX100: Built-in Controller

Describes the controller integrated into the front top board of the MX100 model.

Sensor Technology Explained

Key Sensor Types

Explains the three main categories of key sensors: Hammer, Key, and Pedal sensors.

Hammer Sensor Types

Details the different types of hammer sensors, including 1-beam 2-points and 1-beam 4-points.

Pedal Sensor Types

Describes variations in pedal sensors: ON/OFF switch-type and grayscale-type.

Servicing Procedures - UP Silent Models

Shank Stopper and Let-Off Adjustment Principles

Explains principles for adjusting shank stop and let-off positions for silent mode.

Rotary Type Adjustment

Details adjustment steps for rotary type shank stoppers and let-off positions.

Motor-Driven Type Adjustment

Provides adjustment procedures for motor-driven type shank stoppers.

Servicing Procedures - GP Silent Models

Shank Stopper Angle Adjustment

Explains how to adjust the shank stopper angle for proper silent operation.

Regulating Rod Adjustment

Details procedures for adjusting regulating rods for silent operation.

Maintenance Mode Operations

Pedal Measurement Procedures

Guides on measuring pedal stroke (a-d) and half-point (HP or c, d).

Test Mode Functions

Silent Piano & GranTouch Sensor Testing

Program Rewriting and ROM Replacement

Error Message Reference

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