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Shugart Manuals
Computer Hardware
455
Reference manual
Shugart 455 Reference Manual
Flexible disk storage drive
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
Table of Contents
List of Figures
List Oft Ables
Abbreviations/Mnemonics
Notice to Users
Section I Introduction
Purpose
General Description
Specifications Summary
Performance Specifications
Functional Specifications
Physical Specifications
Reliability Specifications
Functional Characteristics
Read/Write and Control Electronics
Drive Mechanism
Positioning Mechanics
Read/Write Heads
Recording Formats
Recommended Incoming Inspection
Necessary Equipment
Procedure
Functional Operations
Power Sequencing
Drive Selection
Motor on
Track Accessihg
Step out
Side Selection
Read Operation
Write Operation
Sequence of Events
Section II Electrical Interface
Introduction
Signal Interface
Input Lines
Input Line Terminations
Drive Select 1-4
Motor on
Direction Select
Step
Write Gate
Write Data
Side Select
Output Lines
Track 00
Index/Sector
Read Data
Write Protect
Ready
Power Interface
Frame Grounding
Section III Physical Interface
Introduction
Jl/Pl Connector
J2/P2 Connector
Frame Grounding
Section IV Physical Specifications
General
Mechanical Dimensions
Mounting
Error Recovery
Write Error
Read Error
Seek Error
Section VI Recording Format
General
Byte
Formats
Soft-Sectored Recording Format
Track Layout
Hard-Sectored Recording Format
Section VII Customer Installable Options
Introduction
Pluggable/Trace Options
Terminator Resistor Pack
Factory Trace Jumpers
Section VIII Theoryofoperation
Theory of Operation
Read/Write Operations
Read/Write Head
Write Circuit Operation
Read Circuit Operation
Drive Motor Control
Index Detector
Track Zero Indication
Trackaccessing
Stepper Motor
Stepper Control
Drive Select
Write Protect
Ready
Section X Maintenance
Maintenance and Maintenance Equipment
Alignment Diskette
Exerciser PCB
Special Tools
Diagnostic Techniques
Introduction
Soft Error" Detection and Correction
Write Error
Read Error
Troubleshooting
Adjustments
Head Radial Alignment
Read/Write Head(S) Azimuth Check
Head Amplitude Check
Track Zero Detector Assembly Adjustment
Index/Sector Timing Adjustment
Motor Speed Adjustment (Using a Frequency Counter)
Write Protect Detector
PCB Test Point Locations
Removals and Replacements
Faceplate Latch
Direct Drive Motor Assembly
Head and Carriage Assembly
Stepper Motor and Actuator Assembly
Clamp Hub Assembly
Write Protect Sensor and Index Detector Assembly
Track Zero Photo Detector Assembly
Section XI Spare Parts
Routine Order Entry
Emergency Order Entry
Optional Sourcing
Section XII Illustrated Parts Catalog
Description
Quantity Per Assembly
Recommended Spare Parts Stocking Guide
Section XIII Schematic Diagrams
Section XIV Packaging
Packing for Reshipment
Appendix Aordering Information
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Reference
Manual
October 1984
P/N 39409-1
Shugart 455/465
Flexible Disk
Storage Drive
Shu~art
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