Yamaha PORTATONE PSR-9000 Service Manual page 12

PSR-9000
11 FDD Unit
11-1 Remove the lower case. (See procedure 1.)
11-2 Remove the power supply unit. (See procedure 2.)
11-3 Remove the right speaker box unit. (See procedure 7.)
11-4 Remove the four (4) screws marked [110b]. The FDD
unit can then be removed. (Fig. 6)
12 MV Circuit Board
12-1 Remove the lower case. (See procedure 1.)
12-2 Remove the power supply unit. (See procedure 2.)
12-3 Remove the left speaker box unit. (See procedure 7.)
12-4 Remove the four (4) screws marked [480e] and the
MASTER VOLUME knob. The MV circuit board
can then be removed. (Fig. 6)
13 INLET Circuit Board and VSEL Circuit Board
13-1 Remove the lower case. (See procedure 1.)
13-2 Remove the power supply unit. (See procedure 2.)
13-3 Remove the left speaker box unit. (See procedure 7.)
13-4 Remove the two (2) screws marked [480f] and the
POWER knob. The power switch can then be removed.
13-5 Remove the two (2) screws marked [700c]. The
INLET circuit board can then be removed. (Fig. 6)
13-6 Remove the two (2) screws marked [700d]. The
VSEL circuit board can then be removed. (Fig. 6)
Lower shield box
FDD unit
[110b] x 4
12
[40d] x 18
DP
DM
[440] x 4
[40]: Bind Head Tapping Screw-B 4.0X10 MFZN2Y (EP600250)
[110]: Pan Head Sems Tapping Screw 3.0X10 (V5115200)
[440]: Bind Head Screw 3.0X8 MFNI33 (VB748400)
[480]: Bind Head Tapping Screw-B 3.0X8 MFZN2Y (EP600250)
[700]: Bind Head Tapping Screw-B 3.0X10 MFZN2BL (EP600140)
14 DP Circuit Board
14-1 Remove the lower case. (See procedure 1.)
14-2 Remove the eighteen (18) screws marked [40d].
The lower shield box can then be removed. (Fig. 6)
14-3 Remove the four (4) screws marked [440]. The DP
circuit board can then be removed. (Fig. 6)
15 DM Circuit Board and TG Circuit Board
15-1 Remove the lower case. (See procedure 1.)
15-2 Remove the DP circuit board. (See procedure 14.)
15-3 Remove the screw marked [40c]. The DM circuit
board and TG circuit board can then be removed.
(Fig. 6)
N.B.: As the DM and TG circuit boards are connected,
they can not be removed separateiy.
VSEL INLET
[700d] x 2
TG
[40c]
(Fig. 6)
MV
[700c] x 2 [480e] x 4
Power switch
[480f] x 2