Disassembling The Keyboard Assembly; Assembling The Keyboard Assembly - Yamaha Portatone PSR 1000 Service Manual

PSR-1000/PSR-2000
16.

Disassembling the Keyboard Assembly

16-1 Remove the Keyboard assembly. (See procedure 11.)
16-2 Remove the two (2) screws marked [30]. The MKS5F
circuit board can then be removed. (Fig. 2)
* Be sure to make a correct match when connecting
MKS5F (CN1) and DM (CN102).
Connecting the connectors in the wrong way
around may cause damage to the MKS5F circuit
board.
16-3 Remove the MK-L and MK-H circuit board while
pressing the fifteen (15)hooks A inward, and then remove
the rubber contact. (Fig. 11)
16-4 Remove the twenty-one (21) screws marked [140], then
removw the black keys from the lower notes. Afterwards,
remove the white keys DFA and C' and then remove the
white keys CEGB from the higer 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. 12)
Hooks A
Black key
Black key
[140]: Bind Head Tapping Screw-P 3.0x16 MFZN2BL (VB205200)
[140]: Bind Head Tapping Screw-P 3.0x16 MFZN2B (VS756700)
12
MK-L MK-H
,
White key
Rubber contact
(Fig. 11)
[140]
White key DFA
White key CEGB
White key C'
(Fig. 12)
17.

Assembling the Keyboard Assembly

17-1 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. 12)
17-2 Install the rubber contacts in the assembly while pressing
the keys as shown in Figure13. Check that the rubber
contact has been firmly placed into position in the area
indicated by the arrow in Figure 14. When fitting the
rubber contacts, raise both ends of the frame so that keys
do not push the rubber contact up.
17-3 Install the MK-L and MK-H circuit boards in the assembly
so that the hooks B hold it as shown in Figure 15.
Rubber contact
(Fig. 13)
(Fig. 14)
MK-L MK-H
,
(Fig. 15)
Rubber contact
Hooks B