Yamaha SPX990 Service Manual page 9

SPX990
5
PS
Circuit
Board
Removai
5-1
Remove
the
top cover
{see
procedure
1}
5-2
Remove
the
two
(2)
screws
marked
[90). (Fig. 4}
5-3
Puii
out the
push
rod.
(Fig. 5)
5-
4
Remove
the three
(3)
screws
marked
{1001,
then the
PS
circuit
board can be removed.
(Fig. 5)
6
FP1/5 Circuit
Board
Removal
6-
1
Remove
the top cover
(see
procedure
1)
6-2
Remove
the
front
panel
assembly,
(see
procedure
2
)
6-
3
Remove
the
hexagonal
nut
marked
1230J,
then the
FPl/5
circuit
board can be removed.
(Fig. 6)
7
FP2/5 Circuit
Board
Removai
7-
1
Remove
the top
cover, (see
procedure
1)
7-2
Remove
the
front
panel
assembly
(see
procedure
2)
7-
3
Take the FP2/5
circuit
board
out
from
the
sub panel
while
lifting
the
two
stoppers
up
slightly. (Fig. 6)
8 FP3/5
Circuit
Board
Removai
8-
1
Remove
the top
cover, (see
procedure
1)
8-2
Remove
the front panel
assembly
(see
procedure
2)
8-
3
Take
the FP3/5
circuit
board
out
from
the
sub
panel
while
lifting
the stopper up
slightly- (Fig. 6)
9 FP4/5
Circuit
Board Removal
9-
1
Remove
the top
cover
(see
procedure
1)
9-2
Remove
the
front panel
assembly
(see
procedure
2)
9-3
Remove
the
volume knob marked
(3401. (Fig. 5)
9-4
Remove
the
hexagonal
nut
marked
[240],
then
the
FP4/5
circuit
board can be
removed
(Fig 6)
5.
PS'>-
5-1
V
5-2
[90]t7) 4
(i;x|
4
)
5-3
r
y
^ D
y
K 5
POWER
OFFt?:)
;1i'
>'
3
>
(
1
-^ 15
)
5-
4
[100](?5 4'>'3-4-<S-nL.
\-
rnttir.
(11 5
)
6
.
6-
1 F
6-2
7
D >
F
L i
I'o
(2iH#j!(0
6-
3
y
F
FPl/5->-
F
(116)
7.
FP2/5'>"
7-
1 F
(UH#IKi)
7-2
V D >
F
fi^Assy^'A'
L
t
to
(2JH#I!(0
7-
3
F
y
FP2/5V-
F
^tto
(121
6
)
8.
FP3/5'>- \-(DA11d
8-
1 F
yt^'<-^AL^to nmmw)
8-2
7d>
F
''"T'/FAssy^i'FL^to
8-
3
F
FP3/5^ -
F
^
^
ik
^tto
(121
6
)
9.
FP4/5'>-
9-
1
F
yt^'^-^Attto
9-2
VP
>
F
''"T/FAssy^H
L^to
(2iH#M)
9-3
[340]C0rK'J
^-AV-75
(1215)
9-4
[240]i^4m-A;9t
•/ F
m^A
L.
FP4/5'>-
F
(1216)
(Fig.
6)
[230]:Hexagonal Nut i^rnTX^i-
y
I-)
9
0ZMC2BL(VJ388000)
[240]:Hexagonal Nut
y
h) 8 0
ZMC2BL(VQ244800)
12
SPX990