M 3 6 7 5 MINISCRIBE
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 5.25"/HH Cylinders 809| | |
Capacity form/unform 64/ 75 MB Heads 6| | |
Seek time / track 61.0/15.0 ms Sector/track 26| | |
Controller RLL / ST506 Precompensation 128
Cache/Buffer KB Landing Zone
Data transfer rate 0.938 MB/S int Bytes/Sector 512
0.938 MB/S ext
Recording method RLL operating | non-operating
-------------+--------------
Supply voltage 5/12 V Temperature *C 15 45 | -40 57
Power: sleep W Humidity % 8 80 | 8 80
standby W Altitude km -0.061 3.048| 12.000
idle W Shock g 4 | 40
seek W Rotation RPM 3600
read/write W Acoustic dBA 50
spin-up W ECC Bit
MTBF h 20000
Warranty Month
Lift/Lock/Park NO Certificates CSA,FCC,TUV,UL1950
**********************************************************************
L A Y O U T
**********************************************************************
MINISC. 3425P/3438P/3650/3675 PRODUCT DESCRIPTION
+-------------------------------------------------------+
| |XX Power
| |XX
| |
| |XX
| |XX Control
| |XX Cable
| |XX J1
| |XX
| |XX
| |XX
| DS0+-+ |
| DS1| | |XX
| DS2| | |XX
| DS3| | |XX
| JP3| | |XX Data
| +RP1------+ JP2| | |XX Cable
| +---------+ JP1+-+ |XX J2
+-------------------------------------------------------+
**********************************************************************
J U M P E R S
**********************************************************************
MINISC. 3675 PRODUCT MANUAL P/N 1097, REV. C, APRIL 8, 1988
Jumper Setting
==============
Drive Select
------------
+-----------------+---------+-------+-------+-------+
| | DS0 | DS1 | DS2 | DS3 |
+-----------------+---------+-------+-------+-------+
|Drive Select 0 | CLOSED | OPEN | OPEN | OPEN |
+-----------------+---------+-------+-------+-------+
|Drive Select 1 | OPEN | CLOSED| OPEN | OPEN |
+-----------------+---------+-------+-------+-------+
|Drive Select 2 | OPEN | OPEN | CLOSED| OPEN |
+-----------------+---------+-------+-------+-------+
|Drive Select 3 | OPEN | OPEN | OPEN | CLOSED|
+-----------------+---------+-------+-------+-------+
As shipped, the jumper is set to Drive 0 selected.
Drive Excersice Options
-----------------------
As shipped, there are jumpers on JP1 and JP2. JP1 and JP2
jumpers are for factory test modes and must remain on for normal
operation. JP3 is also for factory test modes but must remain open
for normal operation.
Terminators
-----------
Each drive is shipped with a terminator pack providing the 220/330
ohm termination for the Control Input Signals. If multiple drives
are configured in a daisy chain configuration, the terminator pack
must be removed from all drives except the last unit on the daisy
chain.
**********************************************************************
I N S T A L L
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MINISC. 3675 PRODUCT MANUAL P/N 1097 REV. C, APRIL 8, 1988
Notes on Installation
=====================
Drive mounting
--------------
horizontally vertically
+-----------------+ +--+ +--+ +------------------+
| | | +-----+ +-----+ | | | x
| | | | | | | | x+----------------+x
+-+-----------------+-+ | | | | | | ||x x||
+---------------------+ | | | | | | || x x ||
| | | | | | || x x ||
x x | | | | | | || x x ||
+------x------x-------+ | +-----+ +-----+ | || xx ||
+-+------x--x-------+-+ +--+ +--+ || x x ||
| xx | || x x ||
| x x | || x x ||
+---x--------x----+ |x x|
x x x++----------------++x
UNACCEPTABLE! UNACCEPTABLE!
Recommended Mounting Configuration
----------------------------------
The MiniScribe 3675 half height drive is designed to be used in
applications where the unit may experience shock and vibrations at
greater levels than larger and heavier disk drives.
Two features which allow greater shock tolerances are the use of
rugged media and shock mounts. To take full advantage of the shock
mounts, however, it is necessary to provide a 0.1 inch clearance on
both the top and bottom of the drive. This clearance allows for move-
ment of the drive during acceleration. This implies that if the drive
is mounted by the bottom mounting holes on a flat surface, stands-off
are needed under the mounting holes. No special considerations are
required if the drive is mounted using the side mounts except for the
clearance on top and bottom. The drive may be mounted in any attitude
except upside down.
The drive is mounted using 6-32 UNC screws, 1/4 inch maximum
penetration. The customer should allow adequate ventilation to the
drive to insure reliable drive operation over the operating
temperature range.
Cabling
-------
Connect interface cables with connectors P1, P2, P3, and P4 to J1,
J2, J3, and J4 respetively. Insure that connectors P1 and P2 have
keys installed. If multiple drives are be interconnected, remove the
terminator packs in all but the last drive in the daisy chain.
Magnetic Field
--------------
The externally induced magnetic flux density may not exceed 3 Gauss
as measured at the disk surface.
Electrical Interface
--------------------
The interface to the MiniScribe 3675 can be divided into three
categories, each of which are physically separated: Comtrol Signals,
Data Signals and DC Power.
All Control Signals are digital in nature (open collector TTL) and
either provide signals to the drive (input) or signals to the
controller (output). The Data Signals are differential in nature and
provide data either to (write) or from (read) the drive.
The interconnect cable between the drive and controller may be flat
ribbon or twisted pairs of a length not to exceed 20 feet. The signal
return lines and ground lines for P1 and P2 should be grounded at the
controller.
The voltage return lines of P3 should only be grounded at the power
supply.
Connector P4 is a spade lug connector tied to frame ground.
Cable Interconnection - 4 Drive System
--------------------------------------
HOST
+-----------+ +-----------------+
| +---o---Control------------------+P1 Drive 1 |
| | | +-------Data------------+P2 |
| | | | +-Power---+P3 P4 ... |
| | | | | +-----+-----------+
| | | | | +-Frame----+
| | | | | | +-----------------+
|Controller | o----+-------------+----+----+P1 Drive 2 |
| | | | +-----------+----+----+P2 |
| | | | | o----+----+P3 P4 ... |
| | | | | | | +----+------------+
| | | | | | o---------+
| | | | | | | +-----------------+
+-----------+ o----+-+-----------+----+----+P1 Drive 3 |
| | | | | +---------+----+----+P2 |
| +---+----+ | | o----+----+P3 P4 ... |
| +---+------+ | | | +-----+-----------+
| | | | | o----------+
|Data +---+--------+ | | +-----------------+
|Separator | +------------------+----+----+P1 Drive 4 |
| +----------------------+----+----+P2 |
| | o----+----+P3 P4 XXX |
+-----------+ | | +-----+-----------+
DC voltages----+ o----------+
|
Frame Ground--------+
... = Terminator Pack removed
XXX = Terminator Pack installed
P1 Connector - Control Signals
------------------------------
Connection to P1 is through a 34 pin PCB edge connector. The pins are
numbered 1 through 34 with the odd pins located on the componet side
of the printed circuit board. A key slot is provided betweeen pins 4
and 6.
The recommended mating connector (J1) is AMP Ribbon Connector, P/N
88373-3.
P2 Connector - Data Signals
---------------------------
Connection to P2 is through a 20 pin edge connector. The pins are
numbered 1 through 20 with the odd pins located on the component side
of the Printed Circuit Board. A key slot is provided between pins 4
and 6.
The recommended mating connector (J2) is AMP Ribbon Connector, P/N
88373-6.
P3 Connector - DC Power
-----------------------
DC power connector (P3) is a 4 pin AMP Mate-N-Lok connector, mounted
on the PCB. The P3 connector is mounted on the component side of the
PCB.
The recommended mating connector (J3) is AMP P/N 1-480424-0 utilizing
AMP pins P/N 350078-4.
+-----P3-----+ pin 1 +12 VDC
| 4 3 2 1 | pin 2 +12 Ground Return
+------------+ pin 3 + 5 Ground Return
pin 4 + 5 VDC
P4 Connector - Frame Ground
---------------------------
Fasten AMP P/N 61761-2.
The recommended mating connector (J4) is AMP 62187-1.
If used, the hole in P4 will accommodate a wire size of 18 AWG
maximum.
Caution/Warning
---------------
The Miniscribe drive is a precision product weighing 3.5 pounds.
During handling the unit must not be dropped, jarred or bumped.
Otherwise, damage to the heads and disks may occur. When the drive is
removed from the Miniscribe shipping container and not immediately
secured within a chassis through its shock mounts, it must be stored
on a soft padded surface.
Failure to comply with the above procedure will render null and void
all warranties.
**********************************************************************
F E A T U R E S
**********************************************************************
MINISC. 3675 PRODUCT MANUAL P/N 1097 REV. C, APRIL 8, 1988
Introduction
------------
The MiniScribe 3675 is a half-height random access 5-1/4 inch rigid
media disk drive employing Winchester technology. The drive utilizes
a rack-and-pinion actuator, microprocessor control, and open loop
stepper head positioning.
The Model 3675 features power up diagnostics, buffered seek and 7.5
Megabit/Sec. transfer rate. D.C. voltages and physical form factor
are the same as the 5-1/4 inch half height floppy disk drive.
Seek Time (including settling time)
-----------------------------------
+----------------------------------+--------+
| | 3675 |
+----------------------------------+--------+
|Track-to-Track msec. typ. | 15 |
+----------------------------------+--------+
|Average msec. typ. | 61 |
| msec. max. | 132 |
+----------------------------------+--------+
|Latency msec. avg. | 8.33 |
+----------------------------------+--------+
Media Defect Criteria (as shipped from MiniScribe)
--------------------------------------------------
Model 3675 75 defects maximum per drive
24 defects maximum per surface
Defects < 2 bytes in length
Defects may be continguous
Cylinder Zero Defect Free
Error Messages
--------------
The microprocessor performs wake up diagnostics on power up.
Additionally, some operations are monitored during normal operations.
If an error is detected, the microprocessor will flash a warning by
blinking the activity LED.
Error codes may be generated by the microprocessor to indicate hard-
ware failures or warnings that are detected during power-on
diagnostics, burn-in mode, or normal operation. Error codes are
diaplayed in a "morse-code" type manner. Bits may be interpreted
and converted into hexadecimal error codes. "Zeros" are indicated by
a short (1/2 second) flashingn mode. "Ones" are indicated by a short
(1/2 second) continuous ON mode. Error "Words" are separated by a one
second LED off time.
Zero = 0.5 second flashing mode
One = 0.5 second continuous ON mode
Between Bits = 0.5 second Off
Between Repeat Cycles = 1.0 second Off
Listed Below are the binary to hexadecimal conversion values:
0 = 0000 4 = 0100 8 = 1000 C = 1100
1 = 0001 5 = 0101 9 = 1001 D = 1101
2 = 0010 6 = 0110 A = 1010 E = 1110
3 = 0011 7 = 0111 B = 1011 F = 1111
Message Definitions
-------------------
Code 0 - Microprocessor RAM error
Code 1 - Microprocessor ROM checksum error
Code 2 - Interface chip diagnostic failure
Code 3 - Write Fault latch will not reset
Code 4 - Index pulse not detected during spinup
Code 5 - Unable to reach 3600 rpm in 30 seconds
Code 6 - Unable to stabilize spin speed in 10 seconds
Code 7 - Unable to maintain spin speed to 0.5%
Code 8 - Unable to uncover Track Zero sensor
Code 9 - Unable to cover Track Zero sensor
Code A - Track Zero interrupter misadjusted
Code B - Shipping zone error, crash stop misadjusted
Code C - Carriage stuck during recal error
Code D - Seek errror during burn-in or recal
Code E - Unused
Code F - Unexpected interrupt from processor
