AMSTRAD PC1512 - Lever Frame Assembly Exchange; Stepping Motor Assembly Exchange; Head Assembly Exchange

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4-5
Lever Frame
Assembly Exchange
(See
Figure
4-5)
4-5-1
Lever
Frame Assembly Removal
a) Remove the printed circuit board as
described
in
4-1-1.
b) Remove the lever
as
described in
4-2-1.
c)
Remove the front plate
as
described
in
4-3-1
.
d)
Remove the
eject
assembly as described
in
4-4-1.
e)
Unfasten the four lever frame
assembly
fix screws.
f) Lift the lever frame assembly slightly making
sure
that the top head
is not raised, and remove the
slidinh
to
the left.
4-5-2
Lever Frame Assembly Jvlounting and Adjustment.
a)
Lift the
top
head slightly and slide the
pad
mounting part of the
lever frame assembly
under the
top head.
b)
Secure the lever frame assembly
with four screws.
c)
Mount the eject assembly as
described in
4-4-2.
d)
Mount the front plate as described in
4-3-2.
e)
Mount the
lever
as
described
in
4-2-2.
f) Unfasten the two
screws
of hub
shaft holder and centre by
moving the hub up
and down several
times
and secure the two screws.
g)
Mount the printed circuit board ad
described in
4-1-2.
h) After mounting, adjust the index burst time.
(Refer to
5-5).
4-6
Stepping Motor Assembly Exchange
(See
Figure
4-6)
4-6-1
Stepping Motor
Assembly Removal
a)
Remove the printed circuit board as described
in
4-1-1.
b)
Unfasten the head
assembly
metal belt fix
screw.
c)
Unfasten the stepping motor belt fix screw
and remove the keep
plate.
d)
Unfasten the two
stepping
motor assembly
fix screws.
e)
Lift the
stepping motor assembly upward, then slide it to
the left to
remove from the
metal belt.
f) Disconnect
the stepping motor assembly cord from
the hook.
4-6-2
Stepping
Motor Assembly Mounting Adjustment
a)
Keep the
metal belt in the loop form,
insert the
stepping
motor assembly, mount
the metal belt
and keep plate with screws.
b) Align
the oval hole of the stepping motor mounting
plate with the guide
pin and mount the
stepping motor
assembly with two
screws.
Temporary tightening of screws are required.
c)
Pull the tip of the metal belt and mount the metal belt on
the tip of the head assembly
with
a
screw.
d)
Move the head assembly back and
forth
and check
that the metal belt is not
twisted. If twisted,
slightly loosen the metal belt fix screws on
the
stepping
motor assembly and head
assembly, and
move the head assembly
back and forth
several
times.
Fasten the screws
tightly.
e) Place the
stepping motor assembly cord on the hook.
f) Mount the printed
circuit board as described in
4-1-2.
g)
Adjust
the radial track after mounting. (Refer
to
5-2).
Caution:
Do
not reuse the metal
belt removed from the head assembly.
4-7
Head Assembly Exchange (See
Figure
4-7)
4-7-1
Head
Assembly Removal
a) Remove the printed
circuit board
as
described in
4-1-1.
b)
Remove the lever as
described in
4-2-1
.
c)
Remove the front plate
as
described in
4-3-1.
d)
Remove
the eject
assembly
as
described
in
4-4-1.
e)
Remove the lever framne
assembly as described
in
4-5-1
.
f) Remove the
stepping motor assembly as
described in
4-6-1.
g)
Unfasten the PCB post fix screws
and remove the PCB
post.
h) Unfasten the two screws fastening
the guide shaft
keepers A and B
and remove
keepers
A
and B.
i) Lift the guide shaft rear
edge
and
remove the guide shafts
in
a
backward
direction, individually. Be
careful not
to
damage guide shafts
or mix the
right and left shafts.
j)
Carefully remove the head
assembly.
4-7-2
Head Assembly Mounting and
Adjustment
a)
Fit the two guide shafts in the head
assembly without
mixing the right
and left, and
mount in the
housing while holding the guide shaft.
b) Secure guide shaft
keepers A and B using
four screws.