Alpine 7390M - GR Series - Functional Parts Replacement (continued); PC Board Replacement (Front Chassis)

GR Series
4.
Replacement
of
the
parts
mounted
on
the
front
—__b.
Replacement
of
the
contro!
PC
board
of the chassis
a.
Replacement
of
the
audio
PC
board
(1)
Remove
two
solders
@)
and
remove
the
parallel
wire
(7P)
and
the
head
PC
board
as
shown
in
Figure
16.
(2) Adjust the two claws @ to the rectangular
holes on the PC board and remove the PC
board as shown in Figure 16.
(3) After replacement, mount the new PC board
following the removal steps in the reverse
order.
Note: The head PC board and the parallel wires
(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
the
claws
@}
and
remove
the
PC
board
as
shown
in
Figure
11.
(3)
After
replacing
the
old
PC
board
with
a
new
one,
mount
it
following
the
removal
steps
in
the
reverse
order.
Note:
As
mentioned
in
Item
4-a,
handie
the
parallel
wires
carefully,
and
be
sure
that
the
temperature
of
the
soldering
iron
and
the
soldering
time
are
proper.
As
the
wires
of
are
easily
damaged.
Handle
them
with
care.
the
eject
solenoid
are
not
insulated,
do
not
let
them
cross
each
other.
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 PC board.
Base plate assembly
Cassette holder
Head P.C. board
Frame holder Audio P.C. board
Figure 16
13
Eje
frame
“ny ES
Cassette
holder
Frame
holder
Cassette push
lever
Chassis
Figure 17