Circuit Boards - Yamaha SPX50D Service Manual

SPX50D
4-3 Removal
of
FP3/4
circuit
board.
•
Remove
the
2 screws
(g)
(3
x 8
bind
head screw).
(Refer to Fig. 5)
• Disconnect 2 connectors on
the
AD
circuit
board,
and take the
FP3/4
circuit
board out of the
unit.
4-4
Removal
of
the
FP4/4
circuit
board
•
Pull
the
knob
out
from
a shaft of the variable re-
sistor.
•
Remove
a
hexagonal
nut©
(07)
• Disconnect
a
connector
on
the
AD
circuit
board,
and take the
FP4/4
circuit
board out
of the
unit.
4-3
FP3/4'>-
•
T-
(
3
X
8 i^) 2
•
AD->-
FP3/4
h
L
(Fig.5#0S)
4-4
FP4/4'>-
•
INPUT LEVELiO'y-^5
•
eni-y
F©
(0
7)
(
Fig.
5
#,®)
•
AD
F
±<7)
9-
L FP4/4
FP3/4
Circuit
Board
(
0
)
FP1/4
Circuit
Board
Q
OV
r^fi
lU
!LI
1#
^
I
1
|JUU^
^1
M
If
T
Tfm
'o
1 1
i:
-nnn
n
_U
iQ
FP4/4
CircuitBoard
LCD
Circuit
Board
FP2/4
Circuit
Board
Fig.
5
5.
Removal
of
the
LCD
circuit
board.
•
Remove
the
Top
cover
and
Front
panel.
(Refer to
1
.,
4.)
•Remove
the
2 screws
®
(2.6x5
pan head
screw).
(Refer to
Fig. 5)
• Disconnect
the connectors
on
the
AD
circuit
board,
and
take the
LCD
circuit
board out
of the
unit.
5.
LCD'>-
•
F
7n>
Ltto
(1.
4JI#0S)
(2.6X
5
2©$^L^
©=
(Fig.
5 #03)
•
AD
V
LCD
->
-
F
18