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Alpine 7619R - Page 54

Alpine 7619R
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4.
Replacement
of
the
parts
mounted
on
the
front
of
the
main
chassis
a.
Replacement
of
the
audio
P.C.
board
(1)
Remove
two
solders
@)
and
remove
the
parallel
wire
(7P)
and
the
head
P.C.
board
as
shown
in
Figure
16.
(2)
Adjust
the
two
claws
@
to
the
rectangular
holes
on
the
P.C.
board
and
remove
the
P.C.
board
as
shown
in
Figure
16.
(3)
After
replacement,
mount
the
new
P.C.
board
following
the
removal
steps
in
the
reverse
order.
Note:
The
head
P.C.
board
and
the
parallel
wire
are
easily
damaged.
Handle
them
with
care.
Refer
to
Item
2-C
to
make
sure
that
the
temperature
of
the
soldering
iron
and
the
soldering
time
are
proper.
Do
not
bring
the
soldering
iron
near
the
head
P.C.
board.
Base
plate
assembly
Cassette
holder
fra
Head
P.C.
board
Frame
holder
Audio
P.C.
board
Figure
16
Cassette
Eject
b.
Replacement
of
the
control
P.C.
board
me
holder
Cassette
push
lever
GR/GR-Y
Series
(1)
Remove
seven
solders
@)
and
remove
the
three
parallel
wires
and
the
wires
of
the
eject
solenoid
and
of
the
play
solenoid
as
shown
in
Figure
11.
(2)
Remove
five
claws
@3
and
remove
the
P.C.
board
as
shown
in
Figure
11.
[For
GR75E
Series
model]
Remove
four
claws
@3,
and
remove
the
P.C.
board
as
shown
in
Figure
11.
[For
GR75L
Series,
GR-Y
Series,
GR75H
Series
models]
@
_—
After
replacing
the
old
P.C.
board
with
a
new
one,
mount
it
following
the
removal
steps
in
the
reverse
order.
Note:
As
mentioned
in
Item
4-a,
handle
the
parallel
wires
carefully,
and
be
sure
that
the
.
temperature
of
the
soldering
iron
and
the
soldering
time
are
proper.
As
the
wires
of
the
eject
solenoid
are
not
insulated,
do
not
let
them
cross
each
other.
Chassis
Figure
17
Frame
holder
Series
GR/GR-Y
|
c.
Disassembly
and
assembly
of
the
cassette
holder
(1)
Remove
four
screws
@4
and
remove
the
eject
frame
assembly
and
the
frame
holder
as
shown
in
Figure
17.
(2)
Remove
M1.2
lock
washer
@5
and
plate
base
roller
@6)
and
remove
the
cassette
holder
and
the
base
plate
assembly
as
shown
in
Figure
17.
(3)
Remount
them
following
the
removal
steps
in
the
reverse
order.
Notes:
1.
When
mounting
the
cassette
holder
and
the
base
plate,
insert
the
slider
shaft
into
the
eject
arm
and
fix
them
turning
the
slider
shaft
in
the
direction
indicated
by
the
arrow
in
the
figure.
Make
sure
that
the
cassette
holder
and
the
base
plate
are
in
the
cassette-in
mode
during
this
operation.
(Refer
to
Figure
18).
2.
When
mounting
the
eject
frame
assembly,
push
the
cassette
push
lever
in
the
direction
indicated
by
the
arrow
in
the
Figure
17.
3.
When
mounting
the
base
plate
assembly
and
the
eject
frame
assembly,
or
when
mounting
the
eject
frame
assembly
to
the
chassis,
do
not
apply
excessive
force
to
avoid
deformations
of
the
eject
arm
and
the
frame.
4.
Do
not
reuse
the
used
washers.
Take
care
to
avoid
damage
by
piercing
and
tearing.
Base
plate
Slider
Figure
18
Chassis
d.
Replacement
of
the
reels
(1)
Remove
M1.7
two
lock
washers
@é)
(Refer
to
figure
19).
(2)
Move
the
select
lever
in
the
direction
marked
@)-1
in
the
Figure
and
remove
the
reel
by
gripping
the
reel
gear
as
shown
in
Figure
19.
(3)
After
replacement,
mount
the
new
reels
following
the
removal
steps
in
the
reverse
order.
(4)
After
mounting,
check
the
tape
speed
and
the
wow
and
flutter
with
test
tape
MTT-111.
Note:
Since
the
reel
is
easily
loosened
if
the
cap
is
gripped,
always
handle
it
gripping
the
gear.
Do
not
reuse
the
used
washers.
Take
care
to
avoid
damage
by
piercing
and
tearing.
Select
lever
Pinch
roller
Figure
19
—
14
—-

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