Yamaha PSR-S750, Service Manual

Page: 18 / 139

PSR-S750/PSR-S950
18
15. PNL Circuit Board
(Time required: About 5 minutes)
15-1. Remove the lower case assembly. (See procedure 2.)
15-2. Remove the keyboard assembly. (See procedure 14.)
15-3. Remove the ten (10) screws marked [500C]. The PNL
circuit board can then be removed. (Fig. 12)
* When installing the PNL circuit board, tighten the
screws
z
and
x
shown in Fig. 12 in numerical order
and then tighten the other screws.
16. PNC Circuit Board
(Time required: About 5 minutes)
16-1. Remove the lower case assembly. (See procedure 2.)
16-2. Remove the keyboard assembly. (See procedure 14.)
16-3. Remove the ten (10) screws marked [500D]. The PNC
circuit board can then be removed. (Fig. 12)
* When installing the PNC circuit board, tighten the
screws
z
and
x
shown in Fig. 12 in numerical order
and then tighten the other screws.
17. PNR Circuit Board
(Time required: About 5 minutes)
17-1. Remove the lower case assembly. (See procedure 2.)
17-2. Remove the keyboard assembly. (See procedure 14.)
17-3. Remove the nine (9) screws marked [500E]. The PNR
circuit board can then be removed. (Fig. 12)
* When installing the PNR circuit board, tighten the
screws
z
and
x
shown in Fig. 12 in numerical order
and then tighten the other screws.
Projection [A] x 8 Projection [A] x 8
PB
MOD
s500%2#!3%!33%-",9
[500E] x 9 [500D] x 10
[500C] x 10
z
x
z x
0.#
0.,
z
x
0.2
* Only the two (2) projections of the
left speaker grille must be bent in
the counterclockwise direction.
Other projections can be bent in
any direction.
30°–40°
Fig. 12