burroughs B 9489 Manuals

Manuals and User Guides for burroughs B 9489. We have 1 burroughs B 9489 manual available for free PDF download: Technical Manual

burroughs B 9489 Technical Manual

burroughs B 9489 Technical Manual (146 pages)

flexible disk drive

Brand: burroughs | Category: Floppy Disk Drive | Size: 6 MB

Table of Contents

Table of Contents
7
Introduction and Operation
11
- General Description. • 1
  11
  - Configurations
    12
  - Applications
    12
Major Assemblies
12
- Major Assemblies
  13
- Motor and Spindle
  13
- Receiver
  13
- Stepper Motor and Leadscrew
  13
- Carriage
  14
- Pressure Pads
  14
- Magnetic Heads
  14
- Recording Mode
  14
Diagrammatic Recording Head
14
- Printed Circuit Board
  15
- Operation
  15
  - Flexible Disk (Mini-Disk)
    15
  - Sector Configuration
    15
Head Schematic
15
- Data Configuration
  16
- Recording Mode
  16
Sector Configuration
16
- Functions
  17
- Write
  17
- Read
  17
- Physical and Electrical Characteristics
  17
- Physical
  17
- Electrical
  17
- Recording Characteristics
  17
- Format
  17
- Data Access
  17
- Flexible Disk
  18
- Jacket
  18
- Disk Handling
  18
- Operating Procedures
  19
- Indicators and Control
  19
- Electrical Interconnections Host to Master Interface
  19
Disk
19
Positioner Mechanics (Top View)
23
- Carriage
  24
- Magnetic Heads
  24
- Electronics
  24
- File
  24
Functional Detail
23
- Positioner
  23
  - General Description
    23
  - Mechanics
    23
Positioner Electronics Block Diagram
25
- Address Latches
  26
- Address 00 Detector
  26
- Illegal Address
  26
- Current Address Counter and Comparator
  26
- Stepper Motor Drivers
  28
  - Stepper Motor Register
    28
  - Stepper Motor
    30
  - Positioner Clock
    30
Positioner Clock Start-Up
30
- Clock Control
  31
- Direction Control
  31
- Position Settled
  31
- Head Select
  33
  - Head Load Solenoids and Tiler
    33
  - Index and Sector Pulses
    33
Index and Sector Generation
36
- Write
  37
  - General
    37
  - Write Clock
    37
  - Write Data Encode
    38
Write Timing
38
- Unit Selection
  40
- Write Inhibit
  40
- Write and Erase Drivers
  40
- Read Head Select
  40
- Digital Fi Iter
  43
- Data Decode
  43
  - General
    43
  - Selection
    43
- Read Channel Test Points
  43
  - Standardizer and PLL
    45
  - Pll
    45
  - Read Enable Delay
    45
  - Read Clock
    47
  - Data Window
    47
- Worst Case Peak Shift
  47
Schmitt Triggers
49
- SN75452 Dual NAND Driver
  49
- SN7404 HEX Inverter
  50
Circuit Detail
49
- General
  49
- Logic Example
  49
- Collector Output
  49
SN7438 Quad 2-Input Interface NAND
52
Gate with Open Collector Output
52
- SN74132 Quad 2-Input NAND Gate
  52
- SN7474 Dual D-Type Flip Flop
  53
Monostable Multivibrator
53
Adjustments
59
- Introduction
  59
- Special Tools
  59
- Align Me N T Pisk
  59
- Alignment Track Selection Using B 80 MTR
  59
  - Alignment Meter Operating Instructions
    60
  - Adjustments
    60
  - Backlash Nut Adjustment
    60
  - Track to Track Alignment Check
    61
  - Track to Track Alignment Adjustment
    61
  - Circumferential Alignment
    63
  - Track 00 Adjustment
    65
  - Phase Locked Loop and Data Windows
    65
  - DTM ·1000 or BDM 1250
    65
  - Dtm 1000
    67
  - Bdm 1250
    67
Stepper Motor
69
- Head Solenoids
  70
- Pressure Pads
  70
Maintenance Procedures
69
- Removal and Replacement Procedures
  69
- Fascia
  69
- Receiver
  69
- Stepper Motor and Carriage
  69
- Figure
  69
Preventive Maintenance Fuide
70
Fault Finding
70
Recovery of Conta~Inated Disks
70
Certified Disks
70
Common Electronics
72
Installation Procedures
73
Carriage Assembly
103

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