Yamaha S03 Service Manual page 14

S03
10. Assembling the keyboard assembly
(Time required: About 30 minutes)
10-1 Install the white keys CEGB from the lower notes, and then install
the DFA keys and C' key. Afterwards install the black keys from
the higher notes, and tighten the twenty-one (21) screws marked
[140]. (Fig.8)
10-2 Install the rubber contacts in the assembly while pressing the
keys as shown in Figure 9. Check that the rubber contact has
been firmly placed into position in the area indicated by the
arrow in Figure 10. (Fig.9, 10)
*
When fitting the rubber contacts, raise both ends of the frame so
that keys do not push the rubber contact up.
10-3 Install the MK-L and MK-H circuit boards in the assembly so
that the hooks B hold it as shown in Figure 11. (Fig.11)
Rubber Contact
Fig.9
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MK-L , MK-H
Rubber Contact
Fig.10
Hooks B
Fig.11