Sharp FDD-412A - Page 51

FDD412A/B
(19)
TRACK
OO-N
3 2 1 0 0 1 2 3
STEP-N
TT
I
|
i
|
]
]
—T
1
Ta
TRACK
OO-N
|
55
T,
= 0.3
ms
=
T2
T;
20
To
20
Fig. 2.60 Track O0-N Signal Timing
(20) FILE PROTECT-N
With protect notch : ‘Low’ level
Without protect notch: 'High' level
(21)
2ND
FILE
DATA-N
This signal is used only in a daisy chain connection.
The specifications are the same as those of the FILE DATA-N
of (13) above.
3. HANDLING
3.1 Handling Procedures
3.1.1
Floppy
Disk
Not
in
Use
(1)
Keep
the
door
handle
closed.
Dust
and
foreign
matters
will
enter
the
drive
if
the
door
is left
open.
3.1.2
Insertion
of
Floppy
Disk
(1)
Before
opening
the
door,
check
that
the
LED
for
READY
indication
on
the
top
cover
is
not
lit.
(2)
Open
the
door,
and
insert
the
floppy
disk
until
it
hits
a
stopper.
(The
disk
is
automatically
latched;
it
is kept from
popping
out by
an
ejector
spring.)
(3) Do not press the floppy disk once the stopper is reached.
(4)
Take
care
to
orientate
the
floppy
disk
label
correctly.
(The
manufacturer's
ID
label
should
be
on
the
door
handle
side.)
(5) Do not leave the floppy disk inserted halfway. (The spindle may
damage the disk jacket.)
(6)
Insert
the
disk
while
the
spindle
is
rotating.
3.1.3
Opening/Closing
of
Door;
Floppy
Disk
in
Use
(1)
Hold
the
door
center,
and
close
the
door
gently.
At
this
time,
check that the door lock is released.