Yamaha GB1KS Maintenance Handbook page 16

Silent grand piano
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[Damper Pedal]
Pedal at rest
Slight pedal depressed
Pedal half way down
Pedal at stroke end
[Shift Pedal]
Pedal at rest
Pedal on
Pedal at stroke end
Set the buzzer to sound of (*4) when the shift pedal moves the action to the right by 1mm.
[Damper / Shift pedal sensor adjustment spots]
■SW Box Test
[Test start-up (termination)]
Connect headphones and turn on the power.
Push test switch (SW) on the backside of the switch box, to start the test (press SW again to
terminate).
: No Buzzer sound
: Continuous tone (*1)
: Intermittent tone (*2)
: Quick intermittent tone (*3)
: No Buzzer sound
: Intermittent tone (*2)
: Quick intermittent tone (*3)
Damper Pedal Sensor Adjustment Screw
Shift Pedal Sensor Adjustment Screw
Fig.19
Test switch
Fig.20
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