T M 7 0 3 TANDON
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 5.25"/FH Cylinders 695| | |
Capacity form/unform 30/ 36 MB Heads 5| | |
Seek time / track 45.0/ 5.0 ms Sector/track 17| | |
Controller MFM / ST506 Precompensation 300
Cache/Buffer KB Landing Zone 694
Data transfer rate 0.625 MB/S int Bytes/Sector 512
0.625 MB/S ext
Recording method MFM operating | non-operating
-------------+--------------
Supply voltage 5/12 V Temperature *C 4 50 | -40 60
Power: sleep W Humidity % 8 80 |
standby W Altitude km 3.650| 12.000
idle W Shock g |
seek W Rotation RPM 3600
read/write W Acoustic dBA
spin-up W ECC Bit
MTBF h 11000
Warranty Month
Lift/Lock/Park YES Certificates
**********************************************************************
L A Y O U T
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TANDON TM703 PRODUCT SPECIFICATION AND USER'S MANUAL 1984
+---------------------------------------------------------+
| |XX
| |XX J12
| |XX
| |XX
| |XX
| |
| |XX
| |XX
| |XX
| |XX J11
| |XX
| |XX
| |XX
| |XX
| |
| XX J7
| XX
+---------------------------------------------------------+Power
**********************************************************************
J U M P E R S
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TANDON TM703 PRODUCT SPECIFICATION AND USER'S MANUAL 1984
Jumper Setting
==============
Drive Address Guide
-------------------
+------------------------+---------------+-------------+
|Shunt Pack Location 7D |Drive Address |Jumper Plug |
+------------------------+---------------+-------------+
|Connect Pin 4 to Pin 5 |Drive Select 0 | E4 |
|Connect Pin 3 to Pin 6 |Drive Select 1 | E5 |
|Connect Pin 2 to Pin 7 |Drive Select 2 | E6 |
|Connect Pin 1 to Pin 8 |Drive Select 3 | E7 |
+------------------------+---------------+-------------+
The drive address is determined by either a jumper plug or a shunt
pack located on the logic circuit board.
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I N S T A L L
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TANDON TM703 PRODUCT SPECIFICATION AND USER'S MANUAL 1984
Notes on Installation
=====================
Installation direction
----------------------
horizontally vertically
+-----------------+ +--+ +--+
| | | +-----+ +-----+ |
| | | | | | | |
+-+-----------------+-+ | | | | | |
+---------------------+ | | | | | |
| | | | | |
x x | | | | | |
+------x------x-------+ | +-----+ +-----+ |
+-+------x--x-------+-+ +--+ +--+
| xx |
| x x |
+---x--------x----+
x x
Mounting the Drive
------------------
The drive can be mounted in any vertical or horizontal plane. On the
TM703, eight 6-32 tapped holes are provided for mounting: two on each
side and four on the bottom of the frame. The drive is manufactured
with some critical internal alignments that must be maintained.
Hence, it is important the mounting hardware does not introduce
significant stress on the drive.
Any mounting scheme in which the drive is part of the structural
integrity of the enclosure is not permitted. Mounting schemes should
allow for adjustable brackets or incorporate resilient members to
accommodate tolerances.
A sway of 0.1 inch is required between the top of the head disk
assembly and other assemblies in the user system to allow for
movement of the housing on its shock mounts.
Air Filtration
--------------
A self-contained, recirculating air filtration system supplies clean
air through a 0.3-micron filter. A secondary breather filter is
provided to allow pressure equalization with the ambient atmosphere
without contamination. The entire head-disk-actuator compartment is
maintained at a slightly positive pressure to further ensure an
ultraclean environment.
Interface Connectors
--------------------
The electrical interface between the drive and the host system is via
three connectors. J11 provides control signals for the drive. J12
provides for the radial connection of read/write data signals. J7
provides for D.C. power.
J11 Connector
-------------
Connection to J11 is through a thirty-four-pin circuit board
connector. The pins are numbered 1 through 34. The even pins are
located on the component side of the circuit board. Pin 2 is located
on the end of the circuit board connector closest to the DC power
connector J7, and is labeled.
A key slot is provided between Pins 4 and 6. The recommended mating
connector for P11 is 3M ribbon connector P/N 3463-0001, without
ears.
J12 Connector
-------------
Connection to J12 is through a twenty-pin circuit board edge
connector. The pins are numbered 1 through 20. The even pins are
located on the component side of the circuit board. The recommended
mating connector for J12 is 3M ribbon connector P/N 3461-0001,
without ears. A key slot is provided between Pins 4 and 6.
J7 Connector
------------
D.C. power connector J7 is a four-pin AMP Mate-N-Lok connector, P/N
350211-1, mounted on the solder side of the circuit board. The
recommended mating connector, P7, is AMP P/N 1-480424-0, utilizing
AMP pins P/N 60619-4. J7 pins are labeled on the J7 connector. J7
cabling must be 18 AWG minimum.
/------------\ As seen on drive circuit board, solder side.
| 4 3 2 1 | Pin 1 = +12V Pin 2 = return
+------------+ Pin 3 = +5V return Pin 4 = +5V
Interface Line Descriptions
---------------------------
The interface for the TM703 drive is avilable in one configuration.
It is compatible with ST506/412 indutry standard drives.
Compatibility is defined as using the same pin assignment where the
signal and function are common.
The interface may be connected in the radial or daisy chain
configuration.
Frame Ground Connector
----------------------
The frame ground connector is Faston AMP P/N 61761-2. The recommended
mating connector is AMP P/N 62187-1. To realize error rates, it must
be connected directly to the centrally located logic ground via an
18 AWG, minimum, cable.
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F E A T U R E S
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TANDON TM703 PRODUCT SPECIFICATION AND USER'S MANUAL 1984
Introduction
------------
This manual provides useful information to assist the customer when
incorporating the Tandon rigid disk drive into a system.
The TM703 disk drive is a low cost, compact unit that uses a moving
head noncontact recording with standard Winchester technology on a
5-1/4 inch rigid media. The form factor and voltage requirements for
the drive are identical to those of Tandon Corporation's TM100 family
of flexible disk drives.
The storage media is contained within the drive in a fixed, non-
operator-removable configuration.
Purpose of the Drive
--------------------
The 5 1/4 inch disk drive is a rotating disk memory device designed
for random access data storage and retrieval. Typical applications
include word processing systems, entry level microprocessor systems,
intelligent calculators, program storage, small business computer
systems, and any application in which low cost, high speed random
access data storage is required.
Microprocessor Control
----------------------
The TM703 drive features an onboard microprocessor, providing four
major functions:
1. Self-calibration on power-up.
2. Seek timing for the head positioning mechanism.
3. Write current switching for optimal data recording quality.
4. Power and track fault detection.
Functional Description
----------------------
The drive is fully self-contained and requires no
operator intervention during normal operation. During the power-up
sequence, the spindle motor reaches 3,600 RPM, and the positioning
mechanism recalibrates the recording heads back to Track 0. Then, the
heads go through a seek to maximum cylinder and back to cylinder
zero. If the head are positioned on cylinder zero, the drive is
ready for operation. The activity lamp is on during this power-up
sequence. When the drive is ready, the lamp goes off.
If the drive does not pass the power-up seek test, the activity lamp
will flash on and off. To recover from a failure, one must turn
power to the drive off and back on.
The head is positioned over the desired track by means of a voice
coil, closed loop rotary positioning system, its associated
electronics, and a servo pattern written on the servo surface of the
media. Typically, the drive uses MFM write and read data recording
methods. Data recovery electronics include a low-level read
amplifier, differentiator, a zero-crossover detector, and digitizing
circuits. No data decoding feature is provided on the drive. The
magnetic pick-up and index hole positioned to provide an analog
signal when an index hole is detected.
Seek Time
---------
+----------------------------------+--------+
| | TM703 |
+----------------------------------+--------+
|Track-to-Track msec. typ. | 5 |
+----------------------------------+--------+
|Average msec. typ. | 45 |
+----------------------------------+--------+
|Head Settling Time msec. | 2 |
+----------------------------------+--------+
|Latency msec. avg. | 8.33 |
+----------------------------------+--------+
Power Sequencing
----------------
The +5 volt and +12 volt power must be applied together. The
microprocessor starts the spindle motor when both voltages are
active.
Soft and Hard Read Error Rates, Exclusive of Media Defects
----------------------------------------------------------
For data that has been verified previously as error free, and when
used in conjunction with a data separator and phase lock loop of good
design, the recoverable (soft) error rate for any subsequent read
operation shall not exceed one error in 1 x 10(10) bits transferred.
A recoverable read error is an error that may be corrected within
five attempts to reread the data.
The nonrecoverable (hard) read error rates shall not exceed one error
in 1 x 10(12) bits transferred. A nonrecoverable read error is an
error that may not be corrected within five attempty to reread data,
providing that the writing of the data previously has been verified
as correct. The seek error rate is not exceed one error in 1 x 10(6)
seeks.
Media Defects
-------------
Any defects on the media surface will be identified on a defect map
provided with each drive. This defect map will indicate the head
number, track number, and the number of bytes from index for each
defect. Each defect shall be no longer than 16 bits. More
than one defect per track is to be counted as one defect. Cylinders
000 and 001 are guranteed error free.
The defect map is offered as a guide only. The number of defects and
their locations can change due to customer system variations, such
as data separators.
NOTE
On power down, the heads latch in the innermost position.
Mean Time Between Failures 11,000 power on hours
Mean Time To Repair 30 minutes
Component Design Life 5 years
Preventative Maintenance Not Required
Dust Cover
----------
The design of an enclosure should incorporate a means to prevent
contamination from loose items (e.g. dust, lint, and paper chad)
since the drive does not have a dust cover.
