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(4)
(3)
(k)
(1)
(m)
(n)
(0)
FDD412A/B
Switch
sides
0 and
1 and
obtain
V,max,
as
in
step
(i).
Find
values
85%
of Vomax
and
Vimax
measured
in
steps
(i)
and
(3)
above.
Vo
=
0.85Vomax
Vi
i
0.85Vimax
Again
move
the
step
motor
bit
by bit,
switch
sides
0 and
1
for
observation,
and
find
settings
such
that
the
output
voltage
comes
between
85%
and
100%
for both
side
0 and
side
l.
Vomax
2 setting
vo
> Vo
Vimax
2 setting
v,
2 V,
Tighten
the
set
screws
on
the
step
motor
alternately
to
secure
the motor.
(Tighten
the
screws
while
observing
the
output
waveshape,
so
that
no
positional
displacement
will
occur. )
Repeat
the
head
loading
operation
several
times.
Measure
the
head
output
voltage
again,
and
check
that
the
settings
(vo,
vi)
in
step
(m)
above
are
met.
Conduct
track
seeks
of
38>+0+38
and
38>767+38.
Measure
the
head
output
voltage
again,
and
confirm
the
settings
(v9,
v})
in step
(m)
above
are met.
Cautions
(a)
(b)
'(e)
The
CE medium
should
be
under
the
following
conditions
for
at
least
30 minutes
before
use:
Temperature:
23°C +3°C
Humidity
:
50%+10%
RH
Do not
leave
the
CE medium
mounted
for
extended
periods
of
time.
(i)
Replace
every
medium
after
250
usages.
(ii)
Should
the
read
voltage
become
70%
or
less
of
the
initial
value,
replace
the
medium
even
if
the
250
usage
count
is
not
yet
reached.
(iii)
If the
center
hole
is
found
damaged,
replace
the
medium
at once.
When
moving
the
step
motor,
keep
it
along
the
reference
sur-
face.
(When
the
FDD
is
positioned
vertically
as
shown
in Fig.
4.25,
the
step
motor
presses
itself
onto
the
surface
under
its
own
weight.)
Fig. 4.25
Positioning
the FDD for Adjustment
~3-
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