Teac FD-55 Series User manual

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MINI FLEXIBLE DISK DRIVE INSTRUCTION MANUAL

TEAC FD-55(L)
MINI FLEXIBLE DISK DRIVE
INSTRUCTION MANUAL
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P/N 10131159-0CA

TABLE OF CONTENTS
Title
Page
2-1
2-1-1
INSTRUcrIONS FOR HANDLING .......................................... 201
Disk ...•...............................................•......... 201
2-1-2
2-1-3
2-1-4
Disk Handling
Write Protect
........... ~ ........ " .............................. .
205
209
210
FDD Handling
...................................... ~ ............. .
2-1-5 Installation and Ejection of Disk ............•................... 211
2-1-6 Precautions for Transportation ................................... 213
2-2 INSTRUcrIONS FOR INSTALLATION ... ~ ...............•.................. 214
2- 2-1 Precautions for Installation ..................••................. 214
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
2-2-3-3
2-2-3-4
2-2-3-5
2-2-4
2-2-5
Connector and Cable Connection ........................•.......... 216
Signal connector and cable .........................•.•......... 217
Power connector aria cable ........•..•.......................•... 221
Frame grounding ................................................ 223
Setting of Straps and Terminator ...........•................•...• 225
Terminators and interface drivers .............•...........•.... 226
Straps .......................................................... 229
Turn-on conditions of front bezel indicator .................... 237
Rotating conditions of spindle motor ........•........•......... 240
Operating conditions of head load solenoid ...........•......... 242
Inductive Noise in Installed Environment •........................ 244
Front Bezel ...................................................... 248
2- 3 CONTROL P ROCEDURE ................•..............•.................. 2 50
2-4 POWER SUPPLY ............•.......................................... 255
2-4-1 Power On and Off ........•........•.................•..•.......... 255
2-4-2 Internal Current Consumption of the FDD .........•................ 257
2-4-3 Current Consumption Timing Chart ................................. 261
2- 5 WRITE/READ METHOD ....................................•............. 264
2-5-1 Single Density .........•.................................•....... 265
2- 5- 2 Double Densi ty .......•.....•.....•..............•................ 267
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2-1. INSTRUCTIONS FOR HANDLING
The TEAC FD-55(L) series mini flexible disk drive (hereinafter referred
to as FDD) does not require specially delicate handling as long as it is
handled according to the following instructions.
The same care as other similar mini flexible disk drives is required.
Read through and referred to this Instruction Manual before your operation
or system design so that the FDD can show the expected performance.
2-1-1. Disk
Two types are commercially available for 5.25 inch (mini) flexible disks
(hereinafter referred to as disk) according to the sectoring of a track.
One is hard sectored method, which detects each sector photo-electrically
by means of sector holes. The other is soft sectored method which
records an identification pattern on the initial position of each sector.
The FD-55 may be used with either type of disks. Generally, hard sectored
disk is used only for some specific applications.
Fig.20l shows the external view of the disks. The only difference is
that the hard sectored disk has the same number of sector holes as the
number of sectors, on a concentric circle together with an index hole.
The disk itself on which data are recorded is made of 80~ thick
polyethylene film with coated magnetic surfaces. The disk is protected
in a vinyl chloride jacket with liner to retain dust without damage to
-the disk surface. The jacket has open areaSi disk positioning and disk
driving window (central window), oval window for magnetic head contact
with the disk (head window), and index/sector hole detection window
(index window).
In order to maintain high data reliability, it is recommended to use
high quality disks.
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Innermost track
/
/
I
I
,
,
\
133.3mm
(5.25 in)
,,-
"
'"
/
-,' "
/
I
,
I
I
I
I
I
I
/
/
Outermost track
Central window
Notch (write enable notch)
e
e
co
N
o
.....
Head window
Index window
Sector holes
Soft sectored disk
Hard sectored disk
(16 sectors)
(Fig.201) External view of disk
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There are many types in the commercially available soft sectored disks
which are classified according to the following factors. Select the most
appropriate one for your application.
(1) Oata recording density
Single density (FM method) or Double density (MFM method)
Da not use a single density disk for a double density recording.
Expected data reliability will not be obtained and error may occur.
A double density disk can be used for a single density recording.
All the models of FD-55A~F are used for both single and double
density recordings.
(2) Number of used sides
Single sided (only side 0 can be used) or double sided (both sides 0 and
1 can be used).
Use a double sided disk for a double sided FDD. If a single sided disk
is used for a double sided FDO
,
data reliability of the side 1 might be
degraded.
A double sided disk can be used for a single sided FDO.
(3) Track density
48tpi or 96tpi.
It is recommended to use a disk of the same track density as the track
density of an FOO. If a 48tpi disk is used for a 96tpi FOO
,
the data
reliability might be degraded rarely.
Though such an application of using a 96tpi disk for a 48tpi FOD does not
cause practical problem, it is not thoughtful to use in that way.
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(4) Track numbers
Same of commercially available 48tpi single sided FOOs can access only
35 tracks from track 00 to 34. And 35 track disks are used by same
people in a few application.
The operation of the FO-55A is guaranteed for track 00 through 39 <total
40 tracks). However, the data reliability of five tracks from 35 to 39
are not guaranteed when a 35 track disk is used.
Almost all the disks commercially available are guaranteed for up to
40 tracks.
(5) High density disk
For the high density FDD (FO-55G) which is put to practical use recently,
use an exclusive HO disko Da not use disks for FO-55A ~ F.
Generally, disks written by an FD-55A ~ F cannot be read by an FD-55G.
Da not use an HO disk with FO-55A ~ F. The da ta reliability may be
degraded.
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2-1-2. Disk Handling
Disk is aprecision recording media. Be sure to observe the following
precautions.
(1) Oe not tear, fold, or distort the jacket or disk.
(2) Oe not install a damaged disk in the FDD, damaged disk not only disturbs
the normal read or write operation but also it may damage the FDD.
(3) Oe not touch the opening areas of the jacket (magnetic coating area of
the disk). Fingerprints left on the disk will cause errors.
For manual handling of the disk, it is recommended to hold the label
area in Fig.202.
Disk (Jacket)
Label area
Write enable notch
I
'--::~',
I
I I
I
I, \\
I
I 1I I I .'"'
I
~., ,"""
I
I ':~,,'
I
~
I r,
I
ket
I
I I
•
I I : I
I
~ I
L..
__________ .J\- ____ --'
Opening areas of jac
Envelope
(Fig.202) Protective envelope and label area of the disk
(4) Return the disk to its envelope for the protection of the window area
whenever it is removed from the FDD. The disk should not be left
outside of the protective envelope such as on a desk even for a while.
(5) For a long term storage, keep the disk in a protective container with
the envelope in an upright position.
Far a short term storage, a few disks may be piled horizontally without
a container. Da not lean the disks and do not place any heavy objects
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such as books on the disk,. which will cause distortion of the disk.
(6) Keep and use the disk away from dust. Also do not install a dusty
disk into the FOO. Such dust, if carried to the magnetic head, may
cause data errors and may shorten the life of the disk and the FDO.
(7) Da not clip the jacket. The clipped portion will be distorted.
(S) Oe not write on the index label of the jacket with a hard tipped object
such as a lead pencil or a ball point pen which may damage the disk
surface. Use a soft writing object which will not damage the disk such
as a feIt tip pen.
Generally, it is desirable not to write on a label which is already
stuck on the disk. It is recommended to stick the label after writing
the information.
(9) D6 not ruh out the information on the label with an eraser. Rubbish from
the eraser may get into the jacket.
(10) Index label shold be applied on the label area shown in Fig.202.
Da not apply more than two labels on the same area .
•
(lI) Keep the disks away from magnetic fields such as by magnets, transformers,
motors, etc. These may degrade the recorded data on the disk. The
ambient stray magnetic field should not exceed 50 Oersted.
(12) Da not smear the disk with a solvent such as thinner, freon, or alcohol,
it damages the magnetic coating of the disk.
(13) Da not expose the disk to sunlight, micro-waves, or infrared ray. Keep
the disk away from heater or stove. Also do not put the disk on the
electric apparatus such as TV set.
{14} Disks should be operated within the following conditions:
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Ambient temperature: 10°C ~ Sl.soe (50°F ~ 125°F)
Relative humidity: 20\ ~ 80\
Wet bulb temperature: 29°C (84°F), Max.
The above temperature applies to the jacket surface. In the actual
operating condition, approximately 15°C of temperature margin is
required against the operating limit taking the temperature rise in the
FDD assembled in a host system into consideration.
Generally upper limit of the temperature is determined by adeformation
limit of the jacket material because the jacket deformation disturbs
good contact between the disk and the magnetic head which may degrade
performance characteristics.
Also a sudden change in environmental conditions should be avoided even
within the specified range.
(15) Disks should be stored within the following conditions:
Ambient temperature: 4°C ~ sl.soe (40°F ~ 125°F)
Relative humidity: 8% ~ 80%
(16) For transportation, disks should be in the protective container. It is
recommended that a sufficient space exists between the recorded disk and
outer surface of the final container, so that risk of damage due to
stray magnetic fields will be negligible.
Disks should be transported within the following conditions:
Ambient temperature: -40°C ~ sl.s
oe
(-40°F ~ 125°F)
Relative humidity: 8% ~ 90%
Temperature gradient: 20
o
e/hour
(17) Disks which have been stored or transported at temperature and humidity
exceeding the operating conditions may exhibit degradeed perfQrmance.
Such disks should be subjected to a conditioning period of not less than
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