Fujitsu M2301B User manual

M2301 B/M2302B
Microdisk Drives
CE Manual
FUJITSU

REVISION RECORD
REVISION DATE DESCRIPTION
A 16·24-80) First
Edition
B 12·10-81) Manual updated
on pages 3·14,3·15,3·16 and 3·17 and editorial changes.
SPECIFICATION NO.: 803P-4605·0003A
REVISION LETTERS 1,0,0, U AND X ARE NOT USED Date;
Month, Day, Year
© Copyright 1980
by Fujitsu Limited.
Printed in Japan
B03p·4605·QOO3A .... B
Address comments concerning this manual to:
FUJITSU LIMITED
Computer Systems Marketing,
North America and OEM,
6·1 Marunouchi 2-chome, Chiyoda·ku,
Tokyo 100, Japan
TEL 03·216·3211
TLX J22833
Cable
"FUJITSULIMITED TOKYO"
or
FUJITSU AMERICA INC.
2945 Oakmead Village Court, Santa Clara, California
95051, U.S.A.
TEL [phone]
TLX 171182
TWX 910·338-0047

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Note 1. A revision of each page is indicated by the Revision Letter with the specification number of
this manual in the bottom of the page.
Note 2. A bar by the paga number in this page indicates pagination rather than content has changed.
B03P·4605·0003A .•.• B
Sheet 1 of 1
iii

Preface
This manual is for customer engineers who handle M2301 B/M2302B MICRO-DISK
DRIVES.
It describes how to operate, handle and maintain the equipment.
This manual consists
of the following ten sections.
Section 1:
Section 2:
Section 3:
Section 4:
Section 5:
Section 6:
Section
1:
Section 8:
Section 9:
Section 10:
B03P-4605-0003A .... B
General Description
Operation
Installation
and Checkout
Theory
of Operation
Troubleshooting
Maintenance
Spare Parts
IC Detail
Parts List
Schematics
Fujitsu Ltd.
v

Table of Contents
1. GENERAL DESCRIPTION .................................... .
1.1 GENERAL ............................................•......
1,1.1 General .................................................... .
1.1.2 Features ................................................ ' ... .
1.2 SPECIFICATIONS. " ..........................•............•.
1.2.1 Environmental Condition of Installation Site ........................ .
1.2.2 Power Source Specifications .................................... .
1.2.3 Performance ........................•........................
1.2.4 Reliability ................................................•..
1.3 EXTERNAL APPEARANCE .................................... .
2. OPERATION
.................................•..•..•........
2.1 GENERAL .•............................... , ............ , ... .
2.2
POWER ON/OFF SEQUENCE .................................. .
3.
INSTALLATION AND CHECKOUT ...............•..............
3.1 GENERAL .......................................... , ...... ,
3.2 UNPACKING .........................•.....................•
3;3 VISUAL INSPECTION ............................•............
3.4 MOUNTING .............•.. ~ ............................... .
3.4.1 Installation in Locker ...............................•..........
3.4.2 Securing for Transportation " .................................. .
3.4.3 Service Area ........................................•.........
3.5 CABLE ..................................................... .
3.5.1 Cable and Connector Specification ............................... .
3.5.2 Cable Connection .........•...................................
3.6 SWITCH ARRANGEMENT ..................... " .......•........
3.6.1 Drive Select (Device Number Selection) ........................... .
3.6.2 Seek Complete ............................................... .
3.6.3 Sector/Byte Clock ........................................... .
3.6.4 Sector During the Generation of Index ............................ .
3.6.5 Write/Read Data, Write/PLO Clock ...........•............... , .. .
3.6.6 Assigning the Number of Sectors ................................ .
3.6.7 Delay SKC ................•..................................
3.6.8 Controlling by the Basic Drive Select Signal ........................ .
3.6.9 Timing Margin Measurement Switch .............................. .
3.6.10 Input Negative Voltage Selection ................................ .
3.6.11 Timing Specification Selection .................................. .
3.6.12 Media Error ................................................... .
4. THEORY OF OPERATION
..•...............................•...
4.1 GENERAL ....•............. , ..... , ......................... .
4.2 OPERATION OF MECHANICAL PORTION ....................... .
4.2.1 Disk Enclosure ................................................. .
4.2.2 Spindle .............................. ' ............ ; ....•.....
4.2.3 Carriage Assembly .......................................... , .. .
4.2.4 Air Circulation in DE ..............•...........................
4.3 MAGNETIC HEADS AND RECORDING MEDIA .................... .
4.3.1 Magnetic Heads .. ' ................•.......................•....
4.3.2 Recording Media (Magnetic Disk) .•.....••........................
4.3.3 Head and Surface Configuration •.........•.......................
B03P-4605·0003A .. ~. B,
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4.3.4
4.4
4.4.1
4.4.2
4.4.3
4.5
4.5.1
4.5.2
4.5.3
4.5.4
4.5.5
4.5.6
4.5.1
4.6
4.6.1
4.6.2
4.6.3
4.6.4
4.6.5
4.6.6
4.6.1
4.6.8
4.6.9
5.
6.
6.1
6.2
6.2.1
6.2.2
6.2.3
6.2.4
6.2.5
6.2.6
6.2.1
6.2.8
6.2.9
1.
8.
8.1
8.2
8.2.1
8.2.2
8.2.3
8.3
8.4
8.4.1
8.4.2
8.4.3
8.4.4
8.4.5
viii
Clock Track Format ' ................•..•..........•.....•••.•...
FORMAT ...............................••.......••...•......
General .................................. , ...••... , ..•.•..... ,
Track Format
...................•.•....•..........•....•••....
Detail of The Format ....................•.•........•...........
INTERFACE ..............................................•..
General .....................•.........••....•.... ' .... , .....•..
Type and Name of Signal line .................................... .
Signal Lines
.......................•...•...•..•.... ~ ......•...
Timing Specification ..............••..........•....•.. ' ....•....
Format Timing Specification ..........................•..........
Driver/Receiver ..................•.........................•..
Pin Assignment in Connector .....................•....•........•.
ELECTRIC CIRCUIT OPERATION ... : .......................... .
Block Diagram
.............•................•..........•...•..
Start/Stop Circuit .....................................••...•..
DC Spindle Motor Driving Circuit •............................•...
DC Spindle Motor Controller ......... ; .•..•...•........•.........
Unit Select Operation ................•................••.......
SEEK Control ............................................... .
Stepper Driving Circuit
......•.....................••.•.........
Index and Sector Generation Circuit .................•.......•.....
Read/Write Circuit ................................•............
TROUBLESHOOTING ................................•........
MAINTENANCE ..................•..........••.......•.......
GENERAL ............ , ......................•..••.•......•...
CHECK OF THE CONTROL CIRCUIT ................•............
General ................................••.. , •... , ., •....•.•...
Confirming the Switch Settings .....•.....•... ~ .....•..........•..
Check of Standard Frequency Oscillator ......•........•.•..•.......
Check of Clock Signal .....................• , .•....•....•...•..•.
Inspection of PLO Circuit .....................••...•.••.........
Check of Index and Sector ......................• , ..•.•..........
Inspection of VFO Circuit ......................•.....•..••....•.
Observation of the Read Waveform ............. ' .................. .
Check
of the Settling Waveform after Seeking •.•......•••........•...
SPARE PARTS .......................••••..•....•.•..•.......
IC DETAIL ............................... ' ... ' ........•.......
OUTLINE .................................................. .
LOGIC CONVENTION AND SYMBOLOGY
........................ .
TTL Logic ................................•.......•......•...
EC Logic .............. ',' ...•..................... ' ........... .
Logic Symbology
...................................•..........
IC CROSS REFERENCE GUIDE ..•.............................•
IC INTERCHANGEABILITY .......................•.•.•....•...
TTL IC Interchangeability .................•......•.....•........
ECL ....................................... " ...............•.
LINEAR IC ................• ' •• ' ...•.....•......•.•.•.. '. ' .••.....
CMOS .................................•.........•........•.
FUJITSU ANALOG MASTER SLICE IC ............ ' ..........•......
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B03P·4605-0003A .... B

Page
9. PARTS LIST ................................................. 9-1
9.1 ASSEMBLY DRAWINGS ....................................... 9-1
9.2. LIST ....................................................... 9-1
9.2.1 Index No. .............. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 9-1
9.2.2 Composition & Quantity ......................................... 9-1
9.2.3 Specification .................................................. 9-1
9.2.4 Description .................................................. 9-1
10. SCHEMATICS ............................................... 10-1
B03P-4605-0003A ..•. B
ix