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FDD412A/B
GENERAL
Overview
The
FDD-412A/B
floppy
disk
drive
(FDD)
is
a slim,
energy-saving,
lightweight
FDD
that
accommodates
2-sided,
double-density
floppy
disks,
based
on
the
technologies
implemented
in
the
widely
used
FDD-101A/201/
401/102D/402D/403D
FDD..
The
FDD-412A
(Model
A)
incorporates
a VFO,
while
the
FDD-412B
(Model
B)
has
no VFO.
The user
can
select
either
depending
on whether
there
is
a
controller
VFO
or not.
The
standard
specifications
of
the
FDD
are
as
follows:
Mae
(1)
(2)
(3)
(4)
(5)
(6)
File
protection
:
Transparent
Top
cover
color
.: . Black
Door
lock
:
Electromagnetic
door
lock
mechanism
Features
Slim
lined
The
body
is
only
half
as
wide
as conventional
types.
This
makes
it possible
to install
2 units
in a space
for
a single
conven-
tional
type.
Lightweight
The
FDD weights
3.5
kg or
less.
This
weight
is
about
70%
of that
of our
existing
models,
making
handling
procedures
much
easier.
Field-proven
brushless
direct
drive
system
Our
field-proven
brushless
direct
drive
system
is implemented
in
a narrower
enclosure.
This
system
is much
more
reliable
than
the
belt
system
or brush-
based
direct
drive
system.
Without
any
parts
to
be
replaced
periodically,
the
system
is
of
a complete
maintenance-free
design.
'There
is no need
to distinguish
50Hz
and
60Hz
in frequency.
Convenient
VFO
connecting
interface
2-DC
power
supply
A 2-DC
power
supply
system
has
replaced
the
3-DC
power
supply
system.
This
has
reduced
the
average
power
consumption
to
about
57%
of that
of our
existing
models.
LSI-based
circuitry
Dedicated
LSIs
constitute
the
greater
part
of
circuitry.
Without
any
parts
to be
replaced
periodically,
higher
reliability
and
much
better
maintenability
can
be
realized.
.
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