Yamaha AvantGard N3 Onderhoudshandboek - Pagina 42

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11) Determine the correct front/rear position of the damper

holder and tighten the screw from the arm top surface.

Standard 1 Make sure that with the key cover opened the

gap between the back of the black keys and

the front surface of the key cover is within

standard. (Fig. 3)

(Reference) Standard value B (at shipment):

3.3 mm +1.7 mm/-1.3 mm, difference on

the left and right within 1 mm. (Fig. 3)

KEY COVER

BLACK KEY

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. 4)

(Reference) Standard value C (at shipment):

3.2 mm ± 2 mm, difference on the left and

right within 2 mm. (Fig. 4)

KEY COVER

ARM

Fig. 3

Fig. 4

12) Drill a pilot hole in the inner surface of the arm matching

the hole in the damper holder.

Pilot hole: φ 2.1 mm ± 0.1 mm, depth 20 mm

13) Remove the damper holder and countersink the hole.

φ 5 mm x 90°

14) Attach the damper holder, repeat step 11) for front/back

position alignment, and tighten the screw of the damper

holder.

15) Install the arm upper assembly L. At this time, make sure

the distance between the front of the arm lower assembly

L and the front of the arm upper assembly L is 159.6 mm

± 0.5 mm. (Fig. 5)

159.6 mm±0.5 mm

ARM LOWER ASSEMBLY L

Fig. 5

16) Install the front board assembly. At this time, do not

secure the protect cover to the front board assembly.

17) Perform step (10) of "Key Cover Replacement

Procedure".

ARM UPPER ASSEMBLY L