Instruction manual
Disassembly
and adjusting
For
all
models
of
disk
drives
covered
by
this
program,
the
basic
adjustinu
procedures
will
be
the
same.
The
Idea
Is
to
make
VERY
SMALL
adjustments
to the stepper motor that
will
place
the
readlwrite
head
In
the
location
the
microprocessor
has
ordered.
PatIence
Is
required
as
satisfactory
results
will
not happen
instantly.
The
basic
alignment
procedures
are
not
complex,
but
some
mechanical
ability
Is
required.
Always
use
extreme
caution
when
working
around
exposed
electronic
equipment.
Following
the
disassembly
and
adjusting
instructions
below
will
invalidate
your
factory
warranty.
The
1541
drive:
Remove
the 6
screws
from
the bottom of the
drive.
Lift
off
the
upper
cover.
Remove
the perforated
shroud
from
the top
of
the
circuit
board
and
un-plug
the
small
plug
that
connects
the
PC?wer
light.
Now
remove
the 6
screws
that
connect
the
metal
chassis
to the
lower
half
plastic
housing.
Carefully
lay
the
chassis
on
Its
side.
look to the
underside
of the
chassis
for
two
recessed
enamel
covered
screws.
These
are
the stepper
motor
adjusting
screws.
Loosen
these
slightly.
Plug
In
and
turn
on
the
drive.
Begin
drive
alignment
as
per the
on·screen
Instructions.
When
adjustments
are
required,
remember
to
make
VERY
SMAll
adjustments
by
twisting
the stepper motor
gently
as
Indicated
by
the
Alignment
Saeen
display.
The
stepper motor
mount
screw
holes
are
slotted
for
this
purpose.
After
re-tightenlng the
screws,
always
RECHECK
alignment.
When
completed,
turn
off
and
un-plug
the
drive
before
reassembly.
The
SX·64
drive:
This
Is
not it job
for
the
timid.
Complete
disassembly
of
the
computer
housing
Is
required
to
gain
access
to the
drive.
Once
the
drive
has
been
removed
from
Its
frame,
a helper
will
be
required
to
suspend
the
drive
above
Its
frame
while
adjustments
are
made.
The
SX-64
drive
Is
functionally
identical
to the
1541.
The
stepper motor
adjusting
screws
are
located
on
the
underside
of the
drive
chassis.
This
Is
a dangerous undertaking
because
the
drive
chassis
Is
connected to the computer
t~rou9h
numerous
wiring
harnesses
that
make
It
difficult
to
gain
access
to the
underside
of
the
drive.
Use
EXTREME
caution.