JX-305 Sep. 1998
17
2) Next, aligning the positioning bosses of RUBBER
SWITCH with the circular holes of SPACER, and as
done for the spacer, place four RUBBER SWITCH 12PL,
and one RUBBER SWITCH 13P in order, starting on the
lower tone side.
In this procedure, make sure that RUBBER SWITCH and
SPACER are positioned with their cutout parts and
ascape grooves aligned, respectively.
(Refer to fig. 3 and fig. 4.)
3) Next, using the cutout part of PCB and the projecting part
of SPACER as positioning guide, place PCB so that the
positioning pin of SPACER fits into the positioning hole
of PCB. (Refer to fig. 5)
As fig. 6 shows, PCBs consist of three boards, "LOW"
and "HI".
4) Then, tighten the LOW and HI PCBs with the Tap Tight
Screws. First tighten the near-center Screws 1, then the
end Screws 2 on the other side. (This order must be
followd. Ohterwise the PCBs may not be flush with the
Spacers.)
Then tighten the remaining Screws 3 of the LOW and HI
PCBs. (For the above, refer to Fig. 7.)
Finally, tighten the Screws in the area adjacent to the
LOW and HI PCBs.
Since the PCBs may have been warped by soldering, etc.,
it is recommended to gently hole down the center and
tighten the Screws.
2. REMOVAL AND REINSTALLATION OF THE KEYS
Before removing the keys, first take the stopper off the rear
side of the chassis, then take away the spring.
When reinstalling the keys, carefully apply the stopper as
shown in fig. 8.
Bring the stopper into closs contact with the ends of the white
key shafts and press the stopper in the area of the double-
coated tape to secure it. (Refer fig. 8.)
Viewed from the rear side of the chassis.
STOPPER 12P x4
STOPPER 13P
fig.9
32P LOW
29P HI
fig.3
Posisioning Boss(6 points)
RUBBER SWITCH
PCB SPACER
Chassis
fig.4
Air-Escape Groove
Cutout Part
fig.6
fig.5
Projecting Part of SPACER
PCB Cutout Part
Positioning Pin of SPACER
Bass Side Treble Side
32P LOW
29P HI
12
fig.7 (ex. 32P LOW)
3
PCB Adjacent Area
fig.8
Double-Coated
Adhesive Tape
Stopper
Sharp Key Axis
Normal
Key Axis
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