Head Assembly Exchange - AMSTRAD PC1640 Service Manual

Fig.
4-7 Lever Frame Assy Exchange
#
Head Assembly Removal
Remove
the
lever
as described
in
4-3-1
Remove
the bezel as described
in
4-4-1.
Remove
the
LED
assembly
as described 4-5-1.
Remove
the ejector
assembly
as described
in
4-6-1.
Remove
the
lever
frame assembly
as described
in
4-7-1
Disconnect
the connectors (Head
F.P.C.)
Unfasten the screws
fixing
the guide
shaft
keeper A and
B,
then
remove keeper A and
B.
Hold
the
bottom head and
lift
the
head assembly
slightly
then
carefully
remove
by
sliding to the
right.
Remove
the guide
shaft
from
the
head assembly
in
backward
direction.
Head Assembly
Mounting and Adjustment
Insert
the guide
shaft
into
head assembly and mount on
the chassis so
that the follower
pin of
the
head
assembly
fits
into
the screw
of
the
screw
shaft of
the stepping motor assembly by
sliding to the
left.
Secure guide
shaft
keeper A and B
with
two
screws.
Reconnect
the disconnected connectors (head
F.P.C).
Mount
the
lever
Frame assembly
as described
in
4-7-2.
Mount
the ejector assembly as described
in
4-6-2.
Mount
the
LED
assembly
as described
in
4-5-2.
Mount
the bezel as described
in
4-4-2.
Mount
the
lever as described
in
4-3-2.
Adjust the
radial track
alignment
(5-2),
index
burst
time
(5-5),
trackOO sensor
timing
(5-3),
head azimuth
(5-4),
resolution
(5-7)
and symmetry
(5-8)
after
head
mounting.
8
Fig.
4-8 Head Assy Exchange