Yamaha YDO-323 Service Manual page 9

13. MVR Circuit Board, PANEL Circuit Board
(Time required: About 7 minutes each)
13-1 Remove the top board assembly. (See procedure 3)
13-2 Remove the key cover assembly. (See procedure 8)
13-3 Remove the rack L and R. (See procedure 9)
13-4 Remove the stopper rail assembly. (See procedure 10)
13-5 Remove the end block assembly L. (See procedure 11)
MVR Circuit Board
13-6
Remove the three (3) screws marked [9A]. The MVR
circuit board can then be removed. (Fig. 10)
PANEL Circuit Board
13-7
Remove the six (6) screws marked [9B]. The PANEL
circuit board can then be removed. (Fig. 10)
End Block Assembly L
●
[9B]
[9]: Bind Head Tapping Screw-B 3.0X8 MFZN2W3 (WE774300)
Fig. 10
14. Power Switch Assembly
(Time required: About 7 minutes)
14-1 Remove the top board assembly. (See procedure 3)
14-2 Remove the key cover assembly. (See procedure 8)
14-3 Remove the rack L and R. (See procedure 9)
14-4 Remove the stopper rail assembly. (See procedure 10)
14-5 Remove the end block assembly R. (See procedure 11)
14-6 Remove the two (2) screws marked [30]. The power
switch assembly can then be removed. (Fig. 11)
● End Block Assembly R
Power switch assembly
[30]: Bind Head Tapping Screw-B 3.0X8 MFZN2W3 (WE774300)
Fig. 11
[9B] [9A]
PANEL MVR
[30]
15. HP Circuit Board
(Time required: About 6 minutes)
15-1 Remove the top board assembly. (See procedure 3)
15-2 Remove the key cover assembly. (See procedure 8)
15-3 Remove the rack L and R. (See procedure 9)
15-4 Remove the stopper rail assembly. (See procedure 10)
15-5 Remove the end block assembly L. (See procedure 11)
15-6 Remove the two (2) hexagonal nuts marked [3B]. The
HP circuit board can then be removed. (Fig. 12)
Bottom view
[3B]
[3B]: Hexagonal Nut 12X14X2 P=1.0 (WF559900)
Fig. 12
16. PL Circuit Board
(Time required: About 10 minutes)
16-1 Remove the top board assembly. (See procedure 3)
16-2 Remove the key cover assembly. (See procedure 8)
16-3 Remove the rack L and R. (See procedure 9)
16-4 Remove the stopper rail assembly. (See procedure 10)
16-5 Remove the end block assembly L and R.
(See procedure 11)
16-6 Remove the keyboard assembly. (See procedure 12)
16-7 Remove the screw marked [T2f]. The PL circuit board
can then be removed. (Fig. 13)
PL
[T2f]
[T2f]: Bind Head Tapping Screw-1 3.5X12 MFZN2W3 (WE970900)
YDP-323
HP
Arm assembly L
Fig. 13
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