Yamaha AvantGard N3 Maintenance Handbook page 7

Key sensor unit adjustment (N3, N2)
Gap between the lower edge of key and the upper
Position check edge of key sensor unit chassis, when a black key
is depressed to the bottom
Reference dimensions Gap of 3.8 mm to 4.0mm (a)
Adjust the back-and-forth adjustment screws
Adjustment method (1 each) for the 4 bracket positions on the sensor
unit. (※ 1)
* On the N1 and NU1 there is no need to adjust the key sensor unit height.
Hammer sensor adjustment (N3, N2, N1)
Position check M2 ON timing in hammer sensor test mode (check buzzer tone sound)
Reference dimensions Gap between hammer shank and stopper at M2 ON timing: 0.5 mm to 1.75 mm
Adjustment method On the N2, N3: adjust by using the hammer sensor adjustment gear
N1: Adjust by adding hammer sensor height adjuster spacers
* The NU1 has no hammer sensor unit.
Hammer sensor adjustment gear
Locking screw
<Adjustment procedure>
1. Loosen the hammer sensor adjustment gear and loosen the locking screw.
Adjust the height with the hammer sensor adjustment gear.
2.
3. Tighten the locking screw and then tighten the hammer sensor adjustment gear.
Spacer locking screw
Spacer
Bracket locking screw
Locking screw Locking screw
Hammer sensor Hammer sensor
adjustment gear adjustment gear
Wider than 1.75 mm
Loosen the spacer locking screw.
Loosen the bracket locking screw.
Add one spacer.
Tighten the bracket locking screw.
Tighten the spacer locking screw.
Narrower than 0.5 mm
Loosen the spacer locking screw.
Loosen the bracket locking screw.
Remove one spacer.
Tighten the bracket locking screw.
Tighten the spacer locking screw.
N3, N2, N1, NU1
7