Teac FD-55 Series Instruction Manual

-
MINI
FLEXIBLE
DISK
DRIVE
INSTRUCTION
MANUAL
FD-55(L)
MINI FLEXIBLE DISK
INSTRUCTION
MANUAL
DRIVE
P/N
10131159-0CA
-
1.
-
TABLE
OF
CONTENTS
2-1
INSTRUcrIONS 2-1-1 2-1-2 2-1-3 2-1-4 2-1-5 2-1-6 2-2
INSTRUcrIONS 2-
2-1 2-2-2 2-2-2-1 2-2-2-2 2-2-2-3
2-2-3 2-2-3-1 2-2-3-2
Disk Disk Write FDD
Installation
Precautions
Precautions Connector
Setting
...•...............................................•.........
Handling
Protect
Handling
Signal Power Frame
Terminators Straps
Title
FOR
HANDLING
...........
..........................................
~
........
......................................
and
Ejection
for
Transportation
FOR INSTALLATION
for
Installation
and
Cable
connector connector grounding of
Straps
and
..........................................................
Connection
and
aria
................................................
and
interface
of
Disk
... ~ ...............•..................
cable
cable
Terminator
........•..•.......................•...
drivers
...................................
..................••.................
........................•..........
.........................•.•.........
...........•................•...•
"
..............................
~
.............
............•...................
.............•...........•....
Page
201 201 205 209
.
210
.
211 213 214 214 216 217 221 223
225 226 229
2-2-3-3 2-2-3-4 2-2-3-5 2-2-4 2-2-5 2 - 3 2-4 2-4-1
2-4-2 2-4-3 2-
5 WRITE/READ 2-5-1 2-5-2
Turn-on Rotating Operating
Inductive
Front
CONTROL P ROCEDURE
POWER
SUPPLY
Power
Internal
Current
Single Double
conditions
conditions
conditions
Noise
Bezel
On
Density Densi
......................................................
............•..........................................
and
Current
Consumption
METHOD
ty
of
front
of
of
in
Installed
................•..............•..................
Off
........•........•.................•..•..........
Consumption
Timing
....................................•.............
.........•.................................•.......
.......•.....•.....•..............•................
spindle
head
Environment
of
Chart
bezel
motor
load
the
.................................
indicator
........•........•.........
solenoid
FDD
...........•.........
•........................
.........•................
....................
237 240 242 244 248 2
50 255 255
257 261
264
265 267
-
ii
-
2-1.
INSTRUCTIONS FOR
The to
TEAC
as
FDD)
FD-55(L)
does
HANDLING
series
not
require
mini
flexible
specially
disk
delicate
drive
(hereinafter
handling
as
long
referred
as
it
is
2-1-1.
handled The
same Read or
through
system
Disk
Two
(hereinafter One by
means
records
The disk
Fig.20l that
according
care
design
types
is
hard
an
FD-55
is
used
shows
the
as
other
and
referred
so
are
commercially
referred
sectored
of
sector
identification
may
be
only
the
hard
sectored
to
that
used
for
external
the
similar
to
method,
holes.
with
some
following
to
this
the
FDD
available
as
disk)
The
pattern
either specific
view
disk
has
mini
Instruction
can
which
other
of the
instructions.
flexible
show
for
the
5.25
according
detects
is
soft
on
the
initial
type
of
applications.
the
disks.
same
number
disk
Manual expected
to
each
sectored
disks.
drives
inch
the
sector
position
The
of
is
before
performance.
(mini)
sectoring
photo-electrically
method
Generally,
only
difference
sector
required. your
operation
flexible
of a track.
which
of
each hard
holes
sector. sectored
as
disks
is
the number The
of
disk polyethylene in a vinyl
-the
disk driving with
the
(index In high
window).
order
quality
sectors,
itself
chloride
surface.
window
disk
to
maintain
on
film
(central
(head
disks.
on a concentric which
with
The
coated
jacket
jacket
data
with
window),
window),
high
data
-
are
magnetic
liner
has
oval
and
index/sector
reliability,
201
circle
recorded
surfaces.
to
open
areaSi
window
-
together
is
retain
for
it
made
The
dust
disk
magnetic
hole
is
recommended
with of
an
80~
disk
without
positioning
head
detection
index thick is
protected
damage
window
to
hole.
and
disk
contact
use
to
133.3mm (5.25
in)
.-
Central
Notch
I
,
I
I
I
I
I
I
/
/
/
/
"
-,'
'"
Head
window
window
(write
e
e
co
N
o
.....
enable
Index
notch)
window
Innermost
track
I
I
,
,
\
Soft
,,-
/
"
/
Outermost
sectored
(Fig.201)
disk
External
track
Sector
Hard
view
of
disk
-
202
-
(16
holes
sectored
sectors)
disk
There
are
many
types
in
the
commercially
available
soft
sectored
disks
(1)
(2)
which appropriate
Oata
recording
Single
Da
not
Expected
A
double
All
the
density
Number
Single 1
can
be
are
classified
one
density
density
(FM
use a single
data
reliability
density
models
of
recordings.
of
used
sided
sides
(only
used).
according
for
your
method)
density
disk
can
FD-55A~F
side
0
to
application.
or
Double
disk will be
are
can
not
used
be
for
used
used)
the
be
for
following
density
a
double obtained a
single
for
both
or
(MFM
double
factors.
method)
density
and density
single
sided
recording.
error
and
Select
may
occur.
recording.
double
(both
sides
the
0
most
and
Use a double is degraded. A
double
(3)
Track
48tpi
It density reliability Though cause
used
for a double
sided
density
or
96tpi.
is
recommended
of
such
practical
sided
an
might an
FOO.
disk
sided
disk
can
to
use a disk
If
be
degraded
application
problem,
for a double
FDO, data
be
used
a
48tpi
disk
rarely.
of
using
it
is
not
-
203
for
of
the
thoughtful
-
sided reliability
a
single
same
is
used
a
96tpi
FDD.
sided
track for
disk
to
If of
density
a
96tpi
for use
a the
FDO.
a in
single
side
as
FOO, the
48tpi
that
sided 1
might
the
FOD way.
disk
track
data
does
be
not
(4)
Track
Same
35
tracks
numbers
of
commercially
from
track
available 00
to
34.
48tpi
And
single
35
track
sided
disks
FOOs
are
can used
access
by
only
same
(5)
people The
operation
40
tracks).
are
not
Almost
40
tracks.
High
density
For
the
use
an
Generally,
Da
not
degraded.
in a few
However,
guaranteed
all
the
disk
high
density
exclusive
disks
use
an
application.
of
the
when a 35
disks
HO
written
HO
disk
FO-55A
the
data
commercially
FDD
(FO-55G)
disko
Da
by
with
FO-55A ~ F.
is
guaranteed reliability
track
available
which
not
use
an
FD-55A ~ F
disk
is
is
disks
The
for
of used.
are
put
for
cannot
da
track five
00
tracks
guaranteed
to
practical
FO-55A ~ F.
be
read
ta
reliability
through
from
for
by
use
an
may
39
<total
35
to
up
to
recently,
FD-55G.
be
39
-
204
-
2-1-2.
Disk
Handling
Disk precautions.
(1)
Oe
(2)
Oe
the
(3)
Oe
the For area
Opening
not
not
normal
not
disk). manual
Disk
areas
is
aprecision
tear,
install
touch
in
Fig.202.
(Jacket)
fold,
a
read
the
Fingerprints
handling
of
jac
or
damaged
or
write
opening
ket
recording
distort
disk
media.
the
in
operation
areas
left
of
the
I
I
I
I
~.,
I
I
~
I I : I I
L..
__________
of
on
disk,
'--::~',
I,
1I
':~,,'
r,
~
jacket
the
but
the
the
it
\\
I I
,"""
I
.J\-
Be
FDD,
also
jacket
disk
is
recommended
I
I
____
I
I
I I I
I
I
I
--'
.'"'
sure
or
disk.
damaged
it
(magnetic
will
to
observe
may
cause
Label
Write
Envelope
disk
damage
errors.
to
the
not
coating
hold
area
enable
only
the
the
following
disturbs
FDD.
area
label
notch
of
(4)
Return whenever outside
(5)
For a long
the
Far
a
(Fig.202)
the
of
envelope a
short
container.
it
disk
is
the
term
in
term
Protective
to
its removed protective
storage, an
upright
storage,
Da
not
envelope from
lean
envelope
the
envelope
keep
position.
a
few
the
-
for
FDD.
the
disks
disks
205
the
such
disk
-
and
label
protection
The
disk
as
on a desk
in a protective
may
be
and
do
not
should
piled
place
area
of
of
even
horizontally
any
the
the
window
not
be for a while.
container
heavy
disk
area
left
with
without
objects
(6)
such
Keep
as
and
books
use
on
the
the
disk
disk,.
away
which
from
will
dust.
cause
Also
distortion
do
not
install
of
the
a
disk.
dusty
(7)
(S)
(9)
(10)
disk
Generally,
into
cause
Da
Oe
such surface. as a feIt
stuck the
D6
the
Index
data
not
not
as a lead
on
information.
not
eraser
label
the
errors
clip
write
Use a soft tip
it
the
ruh
out may
FOO.
the
on
pencil
pen. is
disk.
the
get
shold
Such
and
jacket.
the
index
desirable
It
information
into
be
dust,
may
shorten
The
label
or a ball
writing
is
recommended
the
applied
clipped
object
not
jacket.
on
if
of point
to
on
the
carried
the
portion
the
pen
which
write
the
label
to
life
of
jacket
which
will
on a label
to
stick
label
area
the
magnetic
the
disk
will
with
be
with a hard
may
not
damage
which
the
label
an
shown
and
distorted.
damage
is after
eraser.
in
Fig.202.
head,
the
tipped
the
the
already
Rubbish
may
FDO.
object
disk
disk
writing
such
from
(lI)
(12)
(13)
{14}
Da
not
Keep
motors,
ambient
Da
not
it
damages
Da
not
the
disk
electric
Disks
apply
the
smear
expose
should
more
disks etc. stray
the
the
away
apparatus
be
than
away These magnetic
disk
magnetic
the
disk
from
heater
such
operated
from
may
with
two
magnetic
degrade
field
coating
to
sunlight, or
as
within
labels
should
a
solvent
stove.
TV
set.
-
on
the
fields
the
recorded not
of
the
micro-waves,
Also
the
following
206
-
such
disk.
same
such
exceed
as
do
area
.
as
by
data
not
on
50
Oersted.
thinner,
or put
conditions:
magnets,
the
disk.
freon,
infrared
the
disk
transformers,
The
or
alcohol,
ray.
on
Keep
the
Ambient
temperature:
10°C ~ Sl.soe
(50°F ~ 125°F) Relative Wet
The operating required FDD Generally limit good
performance
Also a sudden
within
(15)
Disks
Ambient
humidity:
bulb
above
temperature:
temperature
condition,
against
assembled
upper
of
the
contact
the
should
temperature:
20\ ~ 80\
the
in
a
host
limit
jacket
material
between
characteristics.
change
specified
be
stored
29°C
applies
(84°F),
to approximately operating
system
of
the
temperature because
the
disk
in
environmental
and
range.
within
the
4°C ~ sl.soe
Max.
the
jacket
15°C
limit
into
taking
consideration.
the
the
magnetic
conditions
following
(40°F ~ 125°F)
surface.
of
temperature
the
is
determined
jacket
conditions:
temperature
deformation
head
which
should
In
the
margin
by
adeformation
may
be
avoided
actual
is
rise
disturbs
degrade
in
the
even
Relative
(16)
For recommended
outer
stray
Disks
Ambient Relative Temperature
(17)
Disks
exceeding
Such
humidity:
transportation,
that
surface
magnetic
should
be
temperature:
humidity:
gradient:
which
have
the
disks
should
8% ~ 80%
a
sufficient
of
the
fields
transported
8% ~ 90%
been
operating
be
disks
should
space
final
will
container, be
negligible.
within
-40°C ~ sl.soe
20oe/hour
stored
or
conditions
subjected
to a conditioning
be
in
the
exists
so
the
following
(-40°F
transported
may
exhibit
protective between
that
~
125°F)
at
the
risk
of
conditions:
temperature degradeed
period
container.
recorded
damage
and
perfQrmance.
of
not
disk
due
humidity
less
to
It
is and
than
-
207
-
(18)
24
When
hours
you
within
install
the
the
operating
disk
to
environment
the
FDO,
be
prior
careful
to
to
use.
handle
it
slowly.
Rough
may
installation
cause
incorrect
will
accelerates
installation.
the
degration
of
the
disk
and
it
-
208
-
2-1-3.
Write
A
write
For
Proteet
enable
reeording
noteh
new
data,
is
loeated
use a disk
on
the
with
right
the
side
noteh
of in
the the
disko eondition
shown installed magnetie
To
proteet errors, Writing eannot
Be
eareful whenever not
be
should
in
Fig.201
in
head
eover or
be
deteeted.
you attaehed be
comp1ete1y
the
in
the
reeorded
the
erasing
not
to
attaeh
(noteh FOO, response
noteh
by
apply
a
beyond
open).
the
FOO
to a write
data with a write
an
erroneous
exeessive
write
the
side
eovered
Write
When a
enables
from
proteet
line
by
the
proteet
disk
reeord
eommand.
aeeidenta1
proteet
write
pressure
tab
to
of
the
tabe
tab
with
eurrent
erasure
tab
eommand
or
not
the
jaeket.
an
as
is
to
noteh.
open
inhibited
to
due
shown
distort
The
Also
noteh
f10w
to
is
into
operational
in
Fig.203.
as
the
tab
should
the
noteh
the
the
jaeket
noteh
(A)
(Fig.203)
Write
-
209
protect
-
o
(B)
tab
Q
~FOld
baek
to
side
2-1-4.
(1)
FOO
Handling
The
FOO
Inserting
should
and
be
handled
ejecting
according
procedure
to
the
of a disk
following
should
instructions.
be
performed
according
Insert
(2)
A
sudden relative within at
the
environmental
(3)
Keep
(4)
Remove
time.
(5) Keep
by
transformer,
a
the new
and
the
the
to
item
disk
correctly
change humidity
specified
operating
condition.
use
the
disk
FOO
away
2-1-5.
in
environmental
should
range.
condition
FOO
away
from
the
from
stray
magnet,
and
be
from
FOO
CRT
carefully.
conditions
avoided
Sufficient
if
there
dust
when
it
magnetic
display,
as
and
will
etc.
such
far
as
possible hours was a
of
sudden
damp.
not
be
or
electromagnetic
as
temperature
even
storage
change
operated
or
if
it
is
required
in
the
for a long
fields
such
is
as
(6)
(7)
(8)
If
such
data
errors
Refer
Da
FDD
For
to
to
,not
except
transportation,
the
apart
item
touch
FDD.
or
the
for
or
equipment
degrades
2-2
for
variable
trained
data
installation
resistors
technicians
refer
to
is
not
reliability.
item
-
2-1-6
210
sufficiently
Refer
of
the
FOD.
or
screw
concerning
not
-
shielded,
to
adjusting
FD-55.
to
apply
it~
2-2-4.
parts
excessive
it
may
in
impact
cause
the
2-1-5.
Installation
and
Ejeetion
of
Disk
LED
indieator
Front
bezel
Write
proteet
noteh
Front
lever
Head
window
(1)
Installation
(a)
(b)
(e)
Set
the
Take
Hold head loeated If
the
while
(Fig.204)
of
front
out a disk
the
label
window
FDD
the
at
faeing the is
label
Inserting
disk
lever
from
side
the
LED
indieator
installed
side
to
its
of
goes
the
the inner
direetion
position
proteetive
disk
side side.
horizcntally
left
side
-
211
and
and
-
of
shown
envelope.
insert
with
(Fig.204)
when
the
the
in
it the
disk
Fig.204.
into
write
,
the
FDD
is
the
FDD
enable
label installed
with
noteh
side
the
goes
up,
(d)
(d
l
vertically
Insert
)
For
the
the
models
with
disk
front
fully
with
lever
and
disk
up.
straightly
eject
option,
into
a
the
light
FDD
with
depressing
enough
force
care.
is required before When sure
(e)
Take turning
aution:Never
(2)
Ejection
(a)
Turn lever.
It
for
the
it
is
to
insert
off
your
90°
elose fingers. be
damaged.
of
the
front
is
recommended
the.
bottom. inserted
in
If
disk
full
it
fully.
fingers
the
~~e
the
lever
to
insertion
to
the
from
clockwise
front
disk
90°
lever is
in
pineh
of
the
bottom,
the
disk,
a
click
and
direction.
with
clamped
depressing with
eounterelockwise
the
lever
with
disk
close
bent
from
sound
two
the
can
the
the
eonäition,
direction
fingers
point
be
front
disk
to
not
lcm,approx.
heard.
lever
with
the
open
to
by
your disk
the
apply
Be
may
(b)
(~)
(e)
excessive
Hold
For the
Put
from
the
the
the lever
the
impact.
rear
FDD.
models
is
disk
side
with
open.
back
of
into
the
disk
eject
the
disk
with
option,
protective
-
212
-
your
disk
envelope
fingers
pops
lightly
out
(See
and
from
Fig.202l.
the
draw
FDD
out
when
2-1-6.
(I)
Precautions
The
following
of
the
FOO
In
order
to
for
and
protect
Transportation
precautions
the
system
the
should in
which
magnetic
be
the
head
referred
FOO
assembly
to
for
is
assembled.
from
transportation
vibration
and
impact during FOO. a
disk,
(a)
The After and
(b)
When projection sheet
(2) Be
(3)
careful
Since
transportation. to
package
transportation,
The
protection
is
installed
insertion
closing
fix
the
lever.
ejecting
of
for
another
not
to
the
FOD
is
several
sheet,.
to
of
the
the
front
the
protection
the
sheet transportation.
expose
small
To
protect
FODs
be
sure
which
all
the
protection
lever,
with
the
FDD
and
light,
the
in
one
to
attach
is
FOOs
sheet
pull
sheet,
your
to
it
FOD
box.
the made at
of
the
is
up
the
open
finger.
excessive
might
from
such
protection
thick
shipment
done
like
projection
the
lever
Store
moisture.
fall
or
abuse,
sheet
paper
from
a
disk
of
depressing
the
removed
be
thrown
it
is
to
the
shaped
the
like
factory.
installation.
the
sheet
the
protection
down
recommended
during
(4)
When
should transportation. to
absorb
the
be
FOD
enough
impact
is
shipped
strong
Also
so
that
assembled to
withstand
the
packaging
the
FOD
will
- 213 -
in a system,
vibration
of
the
system
not
suffer
the
and
system impact
should
from
cabinet during
be
constructed
excessive
impact.
2-2.
INSTRUCTIONS
FOR
INSTALLATION
2-2-1.
(1)
(2)
Refer
your
system
Precautions
Keep
For
the
excessive
It
is
(natural heat. When a
th~
adhered
to
the
following
so
the
FDD example, operation
dust.
recommended
air
fan
is
air.
to
If
the
that
for
away install
ability
cooling
attached
the
FDD.
items
theFDD
Installation
from
dust.
the
of
to
operate
should
in
FDD
is
for
can
FDD the
the
blown
installing
exhibit
away FDD.
the
not
system strongly,
from
Such
FDD
be
obstructed)
and
the
expected
the
floor,
care
in a weIl
cabinet,
a
large
assembling
performance.
without
will
protect
ventilated to
dissipate
install
quantity
it
of
the
disturbing the
FDD
situation
the
to
draw
of
dust
FDD
into
from
radiated
out may
be
(3)
(4)
(5)
(6)
(7)
Da
not magnetic up
such
position.
00
not stove.
Da
not
Da
not
The
screws
surface
place
noise
noises
See
expose
place
place
more
the
the
the
for
FDD source. which
item
the
FDD
FDD
installing
than
2-2-4.
FOD
Smm.
near
may
to
in
in
a
strong
The
magnetic
cause
sunlight.
an
environment
a
situation
the
errors.
FDD
magnetic
head
Keep
with
subject
should
Be
the
not
noise
and
careful
FDD
corrosive
to
protrudc
read
strong
source
amplifier about
away
or a electro-
the
from
heater
air.
vibration.
from
the
will
pick
installing
or
FDD
-
214
-
(8)
Da
not
apply
excessive
force
when
installing
the
FDD
in a system
cabinet.
of
(9)
For
(lO)
For FDD The at
(11)
After it Protruding seek
(12)
Fundamental1y, indicator
the
magnetic
the
connection
the
setting
PCBA,
setting
shipment.
checking
is
bent
operation,
Frame
refer
and
of head.
of to
to
match
Confirm
that extraordinary, cable
the
the
may
which
front
the
of
the item
your
the
be
FOD
FDD
the
straps
2-2-3.
these
head
caught
cause
shou1d
lever
may
be
cables,
(short
system
settings
attach
misalignment
cable
by
be up
might
the
installed
(magnetic
distorted
refer
bars)
be
before
of
the
FDD
other
which
to
item
and
different
operation.
FDD
to
the
parts
of
the
horizontal1y head
2-2-2.
the
does
system
or
increases
head
up),
causes
terminator
from
not
protrude
cabinet.
or
seek
with
or
vertica11y
misalignment
on
the
the
setting
nor
load
at
errors.
the
that
head
with
the
left
FDD
should for a 96tpi Da
not orientation of a disk). between head. As
to
tion angle consideration
install
the
the
of
the
against
side
not
FOO
or
These
magnetic
other
right
down
and
the
form a greater
against
the
FDD
the
front
orientation
orientations
side
the
horizontal
is
required.
the
with
head
down
front
horizontal the
bezel
and
with
angle
magnetic up of
the
than
plane
lever
than
in
vertical
the
FDD
disk
explained
the
indicator
than
up.
plane
or
In
30°
head
may may
above
explained
either
for a 48tpi
with
the
down orientatiop disturb
cause
up
in
(such or above),
misalignment
forming a greater
orientation,
FOO
and
front
horizontal
the
(top
stable
as
the
separate
bezel
the
15°
up.
loading
contact of
orienta-
the
- 215 -
2-2-2.
Connector
The
basical
the
daisy
and
Cable
electric
chaining
Connection
interface
method
through
between
the
the
signal
FDD
and a host
connector
(Jl)
system
and
is
the
N
+1
'"
power Fig.205 Refer FD-55
connector
to
Specification
iT/-~~
:t
__
~+
!c:jH"
I
.....
.
....
,....
(J2).
shows
Fig.206
the
45
location
as
Power
q
44+
l
1
r
------·1
__
..:
J
~I::~·
,.
-
=1'
of
each
to
the
cable
as
to
the
external
connector
~r'
12±1.5
;-
~~--.
connector.
connection.
dimension
connector
Frame
~
__
~IC
Terminator
.
Straps
(Short
Also
(card
ground
socket
bars)
refer
of
J3
to
the
FDD.
edge) terminal
Fig.lOl
.l4±O.5
in
Bottom
side
I
....
Frame grounding parts
(Cl,RlO,
M3
screw)
-
--
----
-
--
--
----
--
-----
---
-------
-
-----..}
(Fig.20S)
Interface
-
connector
216
-
(Units
positions
:mm)
2-2-2-1.
(I)
Signal
Connector
A
0.1
inch
connector
pitch,
and
34-pin
cable
(17
pins,
double
row)
card
edge
connector
is
used
for
the Specification The
(at The used
even the
odd
bottom
numbered
as
the
numbered
Specification). Se1ect ability
a
suitab1e
into
Manufacturers
Connection
signal
as
connector
to
the
pins
side
of
pins
signal
ground
Table
one,
consideration.
method
Housing
Contactor
detailed
of
the
are
201 taking
(Jl).
Jl
are
FOD)
10cated
(OV)
shows
the
Crimping
3463-0001
not
card
10cated
and
on
lines.
examples
type
3M
used
Refer
are
the
edge
used
(See
of
to
Fig.103
dimension
on
the
as
dip
side
Table
of
recommended
the
cab1e
Crimping
583717-5
1-583616-1
parts
the
of 102
in
of
side
signal
the
in
used
AMP
FO-55
the
FDO
of
the
terminals.
PCBA
and FD-55 connectors. and
the
Soldering
583717-5
583854-3
PCBA.
PCBA
are
handling
Maker
P/N
(Table
Po1arizing
Locking
Crimping
Extraction
Matched
201)
Cable
key
cab1e
too1
too1
side
k~y
matched
3439-0000
not
Press: Locater
P1aten:
F1at
3M
P/N:3365/34
-
used
3440-A
plate:
3443-11
3442-3
unab1e
cab1e
(AWG
connectors
217
-
28)
583274-1
530213-1
90268-1
(Hand
91073-1
for
too1)
Twisted
(AWG
signal
583274-1
530213-1
91073-1
pair
28
'"
interface
not
2 4 )
used
cab1e
(2)
Polarizing
A
the
polarizing
PCBA
card
key
key
slot
edge.
is
The
fitted
between
polarizing
key
pins
No.4
protects
(3)
the
and
No.6
connector
eS)
fram
on
(3)
wrong No.2 key As
to
in
far
driver
not
be
turned
data
on a track
Locking
When
pin
For
the
i5
you two numbers
used
fixing
Fig.103
connection
the
position
the
cable
as
the
open
of
the damaged on.
However,
key
use
two
positions
33
for
the
the
(FD-SS
(connection
of
side
connector.
collector
host
even
system
if
the
if a disk
will
be
locking
for
locking
and
34)
cannot
READY
locking
signal.
keys,
Specification)
of
No.33).
type
side
connector
erased.
keys
~2
pin
(FDD
is
(AMP
key
be
holes
are
No.l
It
is
driver
controller
is
installed
P/N
insertion
used
for
above
used.
to
the
position
recommended
is
used
for
side),
inserted
530213-1)
signal
in
(pin
the
wrongly
this
with numbers and
pins
of
No.34
to
use a polarizing
the
interface
the
circuit
and
power
condition,
AMP
P/N
land
OV
lines.
No.2
and
and
will
is
recorded
583717-5,
2,
and
Pin
No.34
No.34
in
(4)
Cable
The maximum
of
For
an of a
multiple reflection of
Therefore,
length
transferred
the
simple interface the
cable,
the
cable
cable
length
waveform
model
receiver
considerably connection of
the
output
is
greater
the
maximum
is
which
which
easily
is
has
caused
an
interface
influenced
having a terminator
10ng
cable
of
FDDs
siqnals
since
cable
such
fram
one
length
as
end
allowed
- 218 -
by
can
daisy
the
of
the
by
disorder
mismatching
driver resistor be
used..
chaining
FDD
connected
cable
is
shorter
or
of
the
at a cable at
the
another
Contrarily,
in
Fig.206,
on
the
is
open
condition.
than
distortion
impedance.
end
and end
for
the
halfway
the
above
explained
simple
model.
In
the
case
of
LI < L2,
shown
in
Fig.206,
the
allowable
Enough
For at and
receivers the Therefore,
for Though of chain
(Refer
Terminator Terminator
care
the
system
host
host
and
determine
total
the
system
the
side
connection
to
cable
is
FDD
of
both
cable
it
length
receiver,
item
resistor resistor
length
required
design,
sides
the
length,
is
construction.
2-2-3-1).
carefully
maximum
sides
recommended
is
different
is
as
3300
lKn
is
remarkably
for
such a case.
observe
cable
to
receive
the
better
the
maximum
follows:
the
input/output
assuming
length
the
for
to
select
depending
cable
3m,Max.
1.5m,Max.
shortened.
the
which
signals the
system
the
appropriate
on
types
length
signal
cable
enables
connections
correctly.
performance.
of
in a typical
waveforms
the
interface
length
cable
The
and
daisy
both
possible,
shorter
of
cable
types
oe
+12V,+5V L2
control
Note:Omark
power
FDD unit
in
the
(Fig.206)
Power
~--~~------~~---------+----~~----~----------~~
Signal
FDD
Typical
cable
shows
connecting
the
FDD
address
- 219 -
cable
scheme
Fundamentally, FDD
has a resistor
terminator.
designated
for
up
to 4 FDDs
by
only
straps
the
final
network
DSO ~ OS3.
for
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