Yamaha AvantGard N3 Maintenance Handbook - Page 43

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N1 ARM UPPER ASSEMBLY REPLACEMENT PROCEDURE

* The following instructions describe the replacement of the arm upper assembly L.

Replacement of the arm upper assembly R is performed in the same way.

Remove the top board unit.

Remove the key cover unit.

Remove the front board assembly.

Remove the four (4) screws marked [S14]. (Fig. 1)

Remove the three (3) screws marked [S2E] holding the

arm upper assembly L and the back rail from the back

board angle. Remove the arm upper assembly L with the

back board angle still attached to the back rail side. (Fig. 1)

* When removing and attaching the arm upper

assembly L during servicing, the back board angle

references the installation position of the arm upper

assembly L.

When removing the arm upper assembly L, never

remove the back board angle from the back rail.

Replace the arm upper assembly L with a new service

part.

* The arm upper assembly L service part does not

include back board angle.

ARM LOWER ASSEMBLY L

[S14]

159.6 mm±0.5 mm

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. 1)

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

secure the protect cover to the front board assembly.

Perform step (10) of "Key Cover Replacement

Procedure".

ARM UPPER ASSEMBLY L

[S14]

Fig. 1

[S2E]

BACK RAIL