Yamaha AvantGard N3 Maintenance Handbook - Page 41
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N1 ARM LOWER ASSEMBLY REPLACEMENT PROCEDURE
* The following instructions describe the replacement of the arm lower assembly L.
Replacement of the arm lower assembly R is performed in the same way.
1)
Remove the top board unit.
2)
Remove the key cover unit.
3)
Remove the key block assembly L.
4)
Remove the front board assembly.
5)
Remove the arm upper assembly L.
<Top view>
[S32]
[S32]
ARM LOWER ASSEMBLY L
9)
Install the key block assembly L.
10) Adjust the damper holder height using damper holder
spacers.
Standard 1 Make sure the red felt does not rub against
keys and is not rolled up when opening the
key cover. (Fig. 2)
Standard 2 Make sure the gap between the red felt and
the keys is not too wide when the key cover
is opened. (Fig. 2)
(Reference) Standard value A (at shipment):
4.5 mm ± 1 mm, difference on the left and
right within 1 mm. (Fig. 2)
6)
Remove the connector assembly from the arm lower
assembly L.
7)
Measure the difference in level between the front of the
arm lower assembly L and the front rail.
8)
Remove the four (4) screws marked [S32], replace the
arm lower assembly L, and attach the connector assembly.
(Fig. 1)
At this time, make sure to attach with the difference in
level to the front rail measured in step 7).
Fig. 1
<Side view>
KEY COVER
KEY
A
FELT (RED)
[S32]
[S32]
ARM LOWER ASSEMBLY R
Fig. 2
N1
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