Yamaha PortaTone PSR-350 Manual de serviço - Página 12
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PSR-350
13.
Keyboard Assembly
(Time required : About 10 min.)
13-1.
Remove the lower case assembly. (See procedure 1)
13-2.
Remove the two (2) screws marked [280B]. The
keyboard assembly can then be removed. (Fig. 4)
14.
Speakers and TW Circuit Board
(Time required : About 10 min.)
14-1.
Remove the lower case assembly. (See procedure 1)
14-2.
Remove the right and left (woofer) speakers by
removing four (4) screws marked [C30] from each
speaker. (Fig. 4)
14-3.
Remove the right and left TW circuit boards by
removing two (2) screws each marked [260J]. (Fig. 5)
14-4.
Remove the right and left (tweeter) speakers. (Fig. 5,
Photo 1)
TW
Sponge
15.
Disassembling the Keyboard Assembly
15-1
Remove the keyboard assembly. (See procedure 13.)
15-2
Remove the two (2) screws marked [30]. The
MKS5 circuit board can then be removed. (Fig. 4)
15-3
Remove the MK-L and MK-H circuit boards while
pressing the fifteen (15) hooks A inward, and then
remove the rubber contact. (Fig. 8)
15-4
Remove the twenty-one (21) screws marked [140],
then remove the black keys from the lower notes.
Afterwards, remove the white keys DFA and C'
and then remove the white keys CEGB from the
higher notes. At this time, lift the keys from the
front and slide them towards you. the keys can then
be removed from the assembly. (Fig. 9)
Hooks A
Black Key
Rubber Contact
12
Speaker (Tweeter)
(Photo 1)
MK-L
,
MK-H
White Key
(Fig.8)
Black Key
White Key
DFA
White Key
CEGB
[140] : Bind Head Tapping Screw-P
(Fig.9)
16.
Assembling the Keyboard Assembly
16-1
Install the white keys CEGB from the lower notes,
and then install the DFA keys and C' key.
Afterwards install the black keys from the higher
notes, and tighten the twenty-one (21) screws
marked [140]. (Fig. 9)
16-2
Install the rubber contacts in the assembly while
pressing the keys as shown in Figure 10. Check
that the rubber contact has been firmly placed into
position in the area indicated by the arrow in Figure 11.
When fitting the rubber contacts, raise both ends
of the frame so that keys do not push the rubber
contact up.
16-3
Install the MK-L, MK-H circuit boards in the
assembly so that the hooks B hold it as shown in
Figure 12.
Rubber Contact
(Fig.10)
(Fig.11)
MK-L
,
MK-H
(Fig.12)
[140]
[140]
Black Key
White Key C'
3.0X16 MFZN2Y
(EP600310)
Rubber Contact
Hooks B