AMSTRAD PC1512 - Parts Exchange; Printed Circuit Board Exchange; Lever Exchange; Front Plate Exchange

4. Parts
Exchange
4-1
Printed
Circuit Board
Exchange
(See
Figure
4-1)
4-1-1
Printed Circuit
Board Removal
a)
Expand the two shield board
pins and cord
holder pin.
b)
Unfasten
the three fix screws
and remove the
shield board.
c)
Disconnect
the connectors (head,
stepping motor, spindle
motor, track sensor,
index sensor, and
write
protect sensor).
d) Unfasten
the three
printed circuit board fix
screws.
e)
Moves '.he head to
inner
about
10mm.
f) Lift the
rear
edge
of the printed
circuit board and pull it
back.
4-1-2
Printed Circuit Board
Mounting and Adjustment
a)
Tilt the printed circuit board as
if
to
lower the front edge,
insert the
front
LED
into the LED
insertion hole on
the front plate, then lower the
rear
edge.
b)
Fix the printed circuit board with
three
screws.
c)
Secure
the shield board with three
fix screws.
d)
Reconnect the
disconnected connectors (head,
stepping motor,
spindle motor, track
sensor,
index sensor, and write protect sensor).
e)
Bend the two
shield board pins and fix the head
cable.
f)
Check the
spindle
speed (5-1),
radial track
(5-2),
track sensor
(5-3),
azimuth
(5-4),
index
burst
time (5-5),
level
(5-6),
resolution
(5-7),
symmetry
(5-8)
and write
protect sensor (5-9)
after mounting.
Note:
Insert the head cord
under
the
shield board
and fix
at
the same
routing
as
before exchange.
Fig.
4-1
Printed Circuit
Board Removal
4-2
Lever Exchange (See
Figure
4-2)
4-2-1
Lever
Removal
a)
Set the lever
horizontally.
b)
Unfasten the fix screw
of the lever.
c)
Pull the lever forward.
4-2-2
Lever Mounting
a) Place
the wide part of the lever cam on the hub
side and check
that the lever shaft
hole can
be
seen from above. (Hub open state).
b) Set the
lever horizontally and insert from
the front.
c)
Secure the
lever with
a
screw.
4-3
Front Plate
Exchange
(See
Figure
4-3).
4-3-1
Front Plate Removal
a)
Remove
the lever
as
described in
4-2-1.
b) Unfasten
the two front plate fix screws.
c)
Pull the front plate
forward.
^
4-3-2
Front Plate Mounting
a)
Insert the front plate from the front.
b)
Secure the front plate with two screws.
Mount the
lever
as
described in
4-2-2.
4-4
Eject
Assembly Exchange
(See
Figure
4-4)
4-4-1
Eject
Assembly Removal.
a) Make
the lever vertical (clamp state).
b)
Remove the printed circuit board as
described in
4-1-1.
c)
Insert protection paper (high quality white paper
approximately 10x30
mm) between the heads
to protect them.
d)
Unfasten the two Eject Assembly fix
screws.
e)
Lift the
top
head (approximately 2
-
3 mm), and
remove the Eject
Assembly.
4-4-2
Eject
Assembly Mounting and Adjustment.
a)
Lift the
top
head and insert the
Eject
Assembly under
the
Head
Arm.
b) Adjust
the position of
eject
assembly that the ejector
lock when the diskette
is inserted
and the
diskette is
ejected
when the lever is operated and
secure the eject
assembly with two
screws.
c) Remove the
protection paper.
d)
Mount the printed circuit board as described
in
4-1-2.
8