Yamaha Portable Grand DGX-220 Service Manual page 14

DGX-220/YPG-225
11. MK-76L and MK-76H Circuit Boards
(Time required: About 7 minutes for each)
11-1 Remove the lower case assembly. (See procedure 1.)
11-2 Remove the E0-B3 white/black keys. (See procedure 10.)
Remove four (4) screws [220A] and nine (9) screws [220B]. The MK-76L circuit board and the key guide can then be
removed. (Fig.13)
11-3 Remove the C3-G6 white/black keys. (See procedure 10.)
Remove five (5) screws [220C] and twelve (12) screws [220D]. The MK-76H circuit board and the key guide can then be
removed. (Fig.13)
* When installing the MK-76L circuit board, tighten the screws from No. 1 through No. 13 in order as shown in Fig.14.
* When installing the MK-76H circuit board, tighten the screws from No. 1 through No. 17 in order as shown in Fig.14.
13 12
2 9 8
12. Rubber Contact
12-1 Remove the lower case assembly. (See
procedure 1.)
12-2 Remove the keyboard assembly correspond-
ing to the rubber contact. (See procedure 10.)
12-3 Remove the rubber contact. (Fig.15)
14
MK-76L
[220A]
[220B]
[220]: Bind Head Tapping Screw-B 3.0X10 MFZN2W3 (WE774200)
MK-76L
11
7 6 5 4 3
MK-76H
Lower Case
(Fig.13)
10 13 14
1 1 3 4 5
(Fig.14)
[220C]
[220D]
MK-76H
15 16
6 7 8 9 10 11
(Fig.15)
17
12 2
Rubber Contact