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Manuals
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MPI Manuals
Floppy Disk Drive
40 Series
Product manual
MPI 40 Series Product Manual
8 inch slimline flexible disk drive
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Proprietary Notice
Technical Assistance
Table of Contents
List of Illustrations
List of Tables
General Description
Introduction
Documentation Composition
Purpose of Equipment
Physical Description
Functional Description
Specification Summary
Performance Specifications
Functional Specifications
Fm Mfm
Physical Specifications
Reliability Specifications
Installation and Operation
Introduction
Unpacking
Mounting Recommendations
Dust Cover
Cooling
Cable Requirements
Type of Cable
Operational Procedures
Diskette Loading
Diskette Care and Handling
Write Protected Diskette
Theory of Operation
Introduction
Section Index
Mechanical Assemblies
Drive Mechanism
Door Mechanism
Cone/Clutch Assembly
Pressure Pad Assembly
Electro-Mechanical Assemblies
Head Load Solenoid
Head/Carriage Assembly
Stepper Motor/Band Assembly
Spindle and Motor
Door Lock Mechanism
Electrical Assemblies
Control Electronics PCBA
Spindle Servo PCBA
Write Protect Sensors
Track 00 and Track 43 Sensors
Index Sensor
3.4.6 Activity Indicator
3.4. 7 Read/Write Heads
Electrical Interface
Control Signals Driver/Receiver Combination
Interface Connections
Input Lines
P3 Connector
Motor on
Drive Select
Side Select
Direction Select
Step
Write Gate
Write Data
Head Load (Alternate Input)
In Use (Alternate Input)
Write Current Switch (Alternate Input)
General Control and Data Timing Requirements
Read Initiate Timing
Initialize and Track Access Timing
Write Initiate Timing
3.5.2 Output Signals
Track 00
Index
Index and Sector Timing
Sector
Ready
Read Data
FM Separated Data (Optional Output)
FM Separated Clock (Optional Output)
Write Protect
Disk Change (Optional Output)
Two Sided (Optional Output)
Alternate I/O Pins
Power Interface
Connector P3, Pin Assignments
Functional Operations
Initialize
Drive Selection
Functional Operation
Drive Select
Track Positioning
Direction Select
Step out
Step in
Spindle Speed Control
Side Selection
Write/Er~Se
Read Operation
Write Data Timing (FM Encoding)
MFM Encoding
General Control Timi~G
Data Encoding and Recovery
Data Encoding
FM Encoding
MFM Encoding
Data Recovery
Bit Shift
3.7.2.2 Write Precompensation
Data Separation
Track Format
Typical Track Format
Section 4 Maintenance
Introduction
General Information
Section Index
Adjustment Procedures
Preventive Maintenance
Read/Write Head(S) and Load Pad Inspection
Recommended Tools and Test Equipment
Removal/Replacement
Adjustment and Measurement
Removal/Replacement Procedures
Printed Circuit Board Assemblies (PCBA)
Removal/Replacement Procedures
Control Electronics PCBA Connector Locations
Front Panel Bezel and Activity LED
Activity Indicator Assembly
Cone Assembly
Clutch Arm Pivot Pin
Clutch Arm Assembly
Head Load Solenoid
Track 00 and Track 43 Sensors
Spindle Drive Motor
Stepper Motor
Stepper Band
Head/Carriage Assembly
Ejector Assembly
Ejector Spring
Head Load Pad Assembly
Hub, Bearings and Spindle Pulley
Door Latch Assembly
Index Sensors
Door Lock Mechanism
Adjustments Procedures
Measurement Procedures
Troubleshooting
Trouble Symptoms
Preliminary Troubleshooting Steps
Drive Won't Step or Steps Erratically
Drive Motor Won't Rotate
Head will Not Load
Bad Index Output
Bad Write Protect Output
Activity Indicator Does Not Light
Read Errors-All Tracks
Read Errors-Random Tracks
Read Errors-Inside Tracks
Cannot Write Data
Erase Bad
Drive Speed Unstable
Optional Configuration
Control Electronics PCBA Jumper Locations
Standard Jumper Configuration
Recommended Spare Parts List
Drawings and Schematics
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Table of Contents
Troubleshooting
TROUBLESHOOTING
84
Preliminary Troubleshooting Steps
85
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