Sensor Testing For Silent Pianos And Grantouch; Mp80/100/1 - Yamaha Disklavier MX100A Product Handbook

6. Sensor Testing for Silent Pianos and GranTouch

Since Silent Pianos and GranTouch models do not have controllers, you need to use the keyboard to engage sen-
sor-test mode. For these models, please enter this mode and check the sensor operation as described below.
6-1 MP80/100/1.., GT10
Enter sensor test mode: 1A + 3B + 4C + [POWER]
Key sensor
2-beams 4-points
Slowly depress key and confirm by listening to the buzzer. (Use headphones.)
K1
K2
K3
K4
Check: • Confirm that all points K1 to K4 are reached.
• Confirm that the key depth for K1 is 2.3 mm.
Adjust: Adjust the sensor height.
Sustain pedal
Slowly depress the pedal and confirm by listening to the buzzer. (Use headphones.)
P1
P2
P3
Check: • Confirm that all points P1 to P3 are reached.
• Confirm that P2 occurs when the damper is 1.5 mm away from the strings.
Adjust: VR1 adjuster on the MN board.
Soft pedal
Slowly depress the pedal and confirm by listening to the buzzer. (Use headphones.)
Check: Confirm that the buzzer comes on when the hammer rail has moved 2–3 mm.
Adjust: Sensor adjustment screw.
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