Yamaha AvantGard N3 Maintenance Handbook page 40

N1
<Side view>
KEY COVER
KEY
A
FELT (RED)
Fig. 8
Standard 2 Make sure that with the key cover closed the
difference in level between the front surface of
the arm and the front of the key cover is within
the standard (especially the difference on the left
and right). (Fig. 10)
(Reference)
Standard value C (at shipment):
3.2 mm ±2 mm, difference on the left and right
within 2 mm (Fig. 10)
• Key cover set (WY612200)
<< Contents of set >>
WU18480
WY158800
40
<Side view>
KEY COVER
BLACK KEY
B
Fig. 9
※ T he damper holder R (WY158900)
shall be symmetrical to the other.
3.5 mm 4.5 mm
Z2681600
<Side view>
C
KEY COVER
ARM
4) Drill a pilot hole in the inner surface of the arm matching
the hole on the back side of the damper holder body.
Pilot hole: φ 2.1 mm ±0.1 mm, depth 20 mm
5) Remove the damper holder and countersink the hole. φ 5
mm x 90°
6) Attach the damper holder, repeat step 3) for front/back
position alignment, and tighten the screw of the damper
holder.
7) Perform the key cover replacement procedure step "(9)
Install arm upper and front board".
WU82040
5.5 mm
Z0061800 Z0062500
Fig. 10
WU89920