Yamaha PSR-S770, Service Manual

Page: 19 / 110

19
PSR-S770/PSR-S970
20-6. Rubber Contact
20-6-1. Remove the rubber contact. (Fig. 12) (Photo 2)
20-7. White and Black Keys
20-8. Remove the twenty-one (21) screws marked [140K],
then remove the black keys from the lower notes.
(Fig. 13)
20-8-1. Remove the white keys DFA and C’. (Fig. 13)
20-8-2. Remove the while keys CEGB from the higher notes.
(Fig. 13)
* Lift the front portion of the keys and slide them
towards you. The keys can then be removed from
the assembly.
20. Disassembling the Keyboard Assembly
20-1. Remove the lower case assembly. (See procedure 2.)
20-2. Remove the keyboard assembly. (See procedure 10.)
20-3.
EMKS61A Circuit Board
(Time required: About 5 minutes)
20-3-1. Remove the two (2) screws marked [30]. The
EMKS61A circuit board can then be removed.
(Fig. 11)
20-4.
MK-L Circuit Board
(Time required: About 6 minutes)
20-4-1. Remove the EMKS61A circuit board.
(See procedure 20-3.)
20-4-2. Remove the MK-L circuit board while pressing the
eight (8) hooks A in the direction of the arrow.
(Fig. 12)
20-5.
MK-H Circuit Board
(Time required: About 6 minutes)
20-5-1. Remove the MK-H circuit board while pressing the
seven (7) hooks A in the direction of the arrow.
(Fig. 12)
HOOK A
BLACK KEY
RUBBER CONTACT
WHITE KEY
MK-L MK-H
,
Fig. 11
Photo 2
Fig. 12
EMKS61A MK-L MK-H
[30]
RUBBER CONTACT