Yamaha SY77 Service Manual page 11

SY77
SY77
10-8.
PNAB
circuit
board removal
1
0-8-1
.
Remove
the
CARD
circuit
board, (see
proce-
dure
6.)
10-8-2.
Remove
the three
(3)
screws
®
(4.0
x 10
bind head tapping screw)
to
remove
the
Card
guide.
10-8-3. After
the seven
(7)
screws
©
(4.0x10
bind head
tapping screw)
have been
re-
moved,
the
PNAB
circuit
board can be
re-
moved.
*The
PNAB
circuit board
is
connected
to
the
PNC
circuit
board with wire harnesses.
10-9.
PNC
circuit
board removal
10-9-1. After the eight
(8)
screws
(Q)
(4.0x10
bind
head
tapping
screw) have been
re-
moved,
the
PNC
circuit
board can be
re-
moved.
10-8.
PNABi--
i-con-LIj
10-8-1.
CARD->-hS'nL*1-,
(635#.®.)
10-8-2.
xlO-'-r-f
>
y
-y
^
i>)
KS'KOM-Lil-.,
10-8-3. xlO'-r-f
>
V 9
-v
g'JI-i+tiPNAB-,'-
PNC-^-h
iJI-L
10-9.
PNC->-
V<n9\-Li}
10-9-1.
@t04->^8
2|s:(4 xlO^'-'f
>
K
h'V
r=f- y)
S'JI-LTffiOM-LSto
PNAB
y-
I-
LT1f-c.rT?V',
11.
LCD
Circuit
Board
(refer to
fig.
81
11-1.
Remove
the
Bottom
cover assembly,
(see
procedure
1.)
11-2.
Remove
the
DM1
and
DM2
circuit
boards,
[see
procedures 2 and
3.)
11-3.
Remove
the
PS
circuit
board, (see
procedure
4.)
11-4.
Remove
the
JKAN
circuit
board, (see proce-
dure
8.)
11-5.
Remove
the
Keyboard
assembly,
(see
proce-
dure
9.)
11-6.
Remove
the
PNAB
circuit
board, (see proce-
dure 10.)
11-7.
The
LCD
circuit
board can
be removed by
removing the
four
(4)
screws
®
(3.0 x
8
bind
head
tapping screw).
II.
LCD->-
('CDil'L:^
(g!8#BI)
11-1.
(S«Ass'y5-^LSto
11-2.
DM1
i;DM2
y-
I-
2'^USi'o
(2t3i^#,ra>
11-3.
ps-y-hs-^TL-Ji-,
ampm)
11-4.
JKANy-LS-^Lii-,
(8:fl#fla)
11-5- ilSfllAss'y^^l-Li-Tc
(9^#,
a?)
11-6.
PNABy-f-^?t-L3To
(10*K#,a8)
11-7.
®t7)^y4-4;(3
X
y
K^'-y
fy^T-y)?-
7j-ttifLCDy-