Alpine 7390M - GR Series - Functional Parts Replacement (continued); Pinch Roller and Head Replacement

GR Series
e. Replacement of the pinch rollers f. Replacement of the head
(1)
Remove
pinch
roller
spring
@
as
shown
in
(1)
After
removing
the
pinch
roller
spring,
remove
Figure
20.
two
screws
@)
as
shown
in
Figure
21.
(2)
Remove
M3.1
lock
washers
@)
and
remove
the
(2)
Remove
solder
@0
and
remove
the
head
from
pinch
roller
as
shown
in
Figure
20.
the
head
PC
board
as
shown
in
Figure
22.
(3)
Mount
the
pinch
rollers
following
the
removal
(3)
After
replacement,
mount
the
new
head
steps
in
the
reverse
order.
following
the
removal
steps
in
the
reverse
Apply
insulation
coating
to
the
position
®-2
of
order.
the
pinch
roller
as
shown
in
Figure
20.
Notes:
1.
Refer
to
Item
2-C
to
make
sure
that
the
Note:
Make
sure
that
the
pinch
rollers
are
temperature
of
the
soldering
iron
and
thoroughly
fixed
and
that
they
are
not
the
soldering
time
are
proper.
Do
not
deformed.
Do
not
reuse
used
lock
washers.
bring
the
soldering
iron
near
the
head
Take
care
to
avoid
damage
by
piercing
and
PC
board.
Make
sure
that
the
head
PC
tearing.
board
is
not
lifted.
2. Fasten the two screws with a fastening
torque of 2.3 kg.cm. Note that the
tension of the head spring can be
decreased if the screws are fastened
Pi too strongly.
Head base
Figure 20
Head base assembly
Figure 21
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