Yamaha YDO-323 Service Manual page 10

YDP-323
17. Back Top Board Assembly
(Time required: About 3 minutes)
17-1 Remove the top board assembly. (See procedure 3)
17-2 Remove the two (2) screws marked [S04A] each from
both sides of the assembly. (Fig. 8)
17-3 Remove the six (6) screws marked [S04B]. The back
top board assembly can then be removed. (Fig. 14)
<Bottom view>
Arm assembly L
[S04C]
[S04B]
AC cord
10
Back Top assembly
[S04]: Truss Head Tapping Screw-1 3.5X25 MFZN2W3 (WE970200)
PK-LF cable
Fig. 15
18. Main Unit
(Time required: About 3 minutes)
18-1 Spread a soft cloth like a blanket on the floor where
the main unit is to be placed in advance.
18-2 Remove the headphone hanger. (See procedure 1)
18-3 Disconnect the AC cord and the PK-LF cable.
(Fig. 15)
18-4 Remove the four (4) screws marked [5c]. (Fig. 16)
18-5 Move the main unit backward, lift it and place it on
the cloth gently. (Fig. 17)
* For safety, this work should be done by two persons.
Keybed assembly
Fig. 14
[5c]: Bind Head Screw 6.0X16 MFZN2B3 (WE969400)
Arm assembly R
[S04B]
[5c]
Fig. 16