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JVC DD-9 A - Page 10

JVC DD-9 A
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Removal
of
the
Main
Parts
/b-@
Main
amp.
P.W.B.
assy
Mechanical
ass’y
Bracket
Fig.
7
No.
4198
|
DD-9A/B/C/E/J/U
Observe
care
in
handling
the
parts
since
the
parts
are
small
in
size
and
the
distance
between
them
are
short
due
to
a
deck
design
aimed
mainly
at
compactness
and
high
perfor-
mance.
(Remove
in
the
order
of
steps
1,
2,
3,
.....
)
Enclosure
assembly
parts
1.
Cassette
door
To
open
the
cassette
door,
push
on
the
eject
button.
Slide
off
the
cassette
door
upwards.
2.
Top
cover
Remove
5
screws
(a)
fastening
the
top
cover
(left
and
right
.....
2
screws
on
each
and
a
screw
on
rear
center).
3.
Bottom
cover
(1)
Remove
3
screws
(2)
(SDSP3008R)
and
a
washer
(3)
(WNS4000S).
—
These
screws
are
fastened
with
the
front
plate
ass’y.
(2)
Remove
5
screws
fastening
the
bottom
cover.
4.
Front
plate
assembly
Remove
5
screws
(5)
fastening
the
front
plate
upwards.
—
Enclosed
2
screws
for
mechanical
assembly.
Electrical
parts
When
removing
the
wires
from
wire
clamp
(QHX2075-001),
cut
off
its
clamp.
(This
clamp
cannot
be
used
again,
then
apply
a
new
clamp.)
1.
Remove
2
screws(6)
fastening
the
computer
P.W.
board.
Open
its
P.W.
board
from
left
side.
2.
Main
amp
P.W.B.
ass’y
(1)
Remove
4
screws
fastening
the
main
amp
P.W.
board
on
the
bottom
side.
(2)
Remove
3
screws
(8)
fastening
the
switches
on
the
front
side.
(3)
Remove
a
screw(9)
fastening
the
bracket
of
the
com-
puter
P.W.
board
on
the
right
side.
(4)
Pull
off
its
P.W.
board
to
rear
low
side.
3.
Level
indicator
P.W.B.
ass’y
(1)
Remove
2
screws
(10)
fastening
its
P.W.
board.
(2)
Remove
a
screw
(16)
fastening
the
bracket.
4.
Counter
P.W.B.
ass’y
Remove
a
screw
side.
fastening
its
P.W.
board
on
the
rigjt
5.
Power
supply
P.W.B.
ass’y
Remove
4
screws
©)
and
lugs
(3)
fastening
the
power
supply
P.W.B.
6.
Electronic
volume
VR
(1)
Remove
the
front
plate
assembly.
(2)
Remove
the
level
indicator
P.W.
board
ass‘y.
(3)
Remove
the
rope.
(4)
Remove
the
pulley.
(5)
Remove
the
computer
P.W.
board
ass’y.
(6)
Unsolder
3
wires
of
V.R.
board.
(7)
Remove
a
nut
and
a
washer
of
shaft.
(8)
Unsolder
the
V.R.
terminals.
7.
Switches
(Reset,
Memory,
etc.)
(1)
Remove
the
front
plate
assembly.
(2)
Remove
each
knob.
(3)
Remove
the
counter
belt.
(4)
Remove
a
screw
fastening
the
bracket
of
the
pulley.
(5)
Remove
2
screws
fastening
the
counter
P.W.
board.
(6)
Remove
5
screws
fastening
the
switches.
(7)
Pull
off
the
switch
P.W.B.
ass‘y
to
rear
side.
g
Volume
_-6GN,
motor
Front
bracket
?
~
A)
(left)
:
P
s
s
Pulley
aS}
Pulley
&
©
Washer
-
6
Nut
Rope
Counter
“le
display
knob
Fig.
8
Mechanical
assembly
(When
removing
the
front
plate
ass’y,
remove
2
screws
fastening
the
mechanical
assembly
upwards.)
1.
Remove
4
screws
(12)
(left
and
right
.....
2
screws
on
each)
fastening
the
mecha.
assembly
to
the
chassis.
2.
Remove
2
screws
43)
fastening
the
gear-oiled
damper
to
the
chassis,
3.
Remove
a
screw
fastening
the
arm
of
the
gear-oiled
damper.
(When
removing
the
cassette
holder,
to
remove
the
left
bracket,
remove
2
screws
fastening
its
bracket.)
4.
Remove
6
connectors
on
the
mecha.
control
P.W.
board.
5.
Open
the
vinyl
wire
clamp
for
head
wires
on
the
chassis
(bottom
side).
6.
Remove
the
counter
belt.
Mechanical
parts
Mechanical
parts
are
the
same
as
removal
of
model
DD-7.
Please
refer
to
the
service
manual
of
DD-7A/8/C/E/J/U
(No.
4195,
page
10).

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