Yamaha AvantGard N3 Maintenance Handbook page 31

Shall be no looseness/play in key cover when closed
N2/3 Shipping criteria: Step (B) or (C) between upper edge of key cover while closed and upper edge of arm
N2/3 Shipping criteria: Approximate difference in step between upper edge of key cover while closed and
3-3. Adjustment A
Adjust the damper width by increasing or decreasing the number of damper spacers.
3-4. Adjustment B
Insert the music rest spacers and music shelf spacers into the specifi ed locations and change the height of the front
top rail.
* In the case of N2, the front top rail can be adjusted up to 2 mm. Do not attempt to adjust beyond this dimension.
Music shelf spacer
shall be 5+1/-4 mm
upper edge of side shim |B–C| shall be within 2 mm
Fig. 4 Fall board adjustment
Fig. 5 Damper holder adjustment
Fig. 6 N3 Music shelf spacer and music rest spacer installation locations
--- If there is looseness/play then perform adjustment E.
C
Damper spacers A and B
Music rest spacer
B
Music shelf spacer
N3, N2
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