MPI 40 Series - User Manual

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Proprietary Notice3
Technical Assistance3
Table of Contents4
List of Illustrations11
List of Tables13
General Description14
Introduction14
Documentation Composition15
Purpose of Equipment16
Physical Description16
Functional Description17
Specification Summary17
Performance Specifications18
Functional Specifications18
Fm Mfm18
Physical Specifications19
Reliability Specifications19
Installation and Operation20
Introduction20
Unpacking20
Mounting Recommendations21
Dust Cover21
Cooling21
Cable Requirements25
Type of Cable25
Operational Procedures25
Diskette Loading25
Diskette Care and Handling26
Write Protected Diskette27
Theory of Operation28
Introduction28
Section Index28
Mechanical Assemblies29
Drive Mechanism29
Door Mechanism29
Cone/Clutch Assembly29
Pressure Pad Assembly29
Electro-Mechanical Assemblies30
Head Load Solenoid30
Head/Carriage Assembly30
Stepper Motor/Band Assembly30
Spindle and Motor30
Door Lock Mechanism30
Electrical Assemblies31
Control Electronics PCBA31
Spindle Servo PCBA31
Write Protect Sensors31
Track 00 and Track 43 Sensors32
Index Sensor32
3.4.6 Activity Indicator32
3.4. 7 Read/Write Heads32
Electrical Interface33
Control Signals Driver/Receiver Combination33
Interface Connections33
Input Lines35
P3 Connector35
Motor on36
Drive Select36
Side Select36
Direction Select36
Step37
Write Gate37
Write Data37
Head Load (Alternate Input)37
In Use (Alternate Input)37
Write Current Switch (Alternate Input)37
General Control and Data Timing Requirements38
Read Initiate Timing39
Initialize and Track Access Timing39
Write Initiate Timing40
3.5.2 Output Signals41
Track 0041
Index41
Index and Sector Timing41
Sector42
Ready42
Read Data42
FM Separated Data (Optional Output)42
FM Separated Clock (Optional Output)42
Write Protect42
Disk Change (Optional Output)43
Two Sided (Optional Output)43
Alternate I/O Pins43
Power Interface43
Connector P3, Pin Assignments43
Functional Operations44
Initialize44
Drive Selection44
Functional Operation44
Drive Select45
Track Positioning45
Direction Select45
Step out45
Step in47
Spindle Speed Control47
Side Selection47
Write/Er~Se48
Read Operation48
Write Data Timing (FM Encoding)49
MFM Encoding49
General Control Timi~G50
Data Encoding and Recovery50
Data Encoding50
FM Encoding51
MFM Encoding51
Data Recovery52
Bit Shift52
3.7.2.2 Write Precompensation52
Data Separation52
Track Format53
Typical Track Format53
Section 4 Maintenance54
Introduction54
General Information54
Section Index54
Adjustment Procedures54
Preventive Maintenance55
Read/Write Head(S) and Load Pad Inspection55
Recommended Tools and Test Equipment56
Removal/Replacement56
Adjustment and Measurement56
Removal/Replacement Procedures56
Printed Circuit Board Assemblies (PCBA)61
Removal/Replacement Procedures61
Control Electronics PCBA Connector Locations62
Front Panel Bezel and Activity LED63
Activity Indicator Assembly64
Cone Assembly65
Clutch Arm Pivot Pin66
Clutch Arm Assembly66
Head Load Solenoid67
Track 00 and Track 43 Sensors68
Spindle Drive Motor69
Stepper Motor69
Stepper Band69
Head/Carriage Assembly72
Ejector Assembly73
Ejector Spring74
Head Load Pad Assembly74
Hub, Bearings and Spindle Pulley75
Door Latch Assembly75
Index Sensors76
Door Lock Mechanism76
Adjustments Procedures77
Measurement Procedures82
Troubleshooting84
Trouble Symptoms84
Preliminary Troubleshooting Steps85
Drive Won't Step or Steps Erratically85
Drive Motor Won't Rotate85
Head will Not Load86
Bad Index Output86
Bad Write Protect Output86
Activity Indicator Does Not Light86
Read Errors-All Tracks87
Read Errors-Random Tracks87
Read Errors-Inside Tracks87
Cannot Write Data88
Erase Bad88
Drive Speed Unstable88
Optional Configuration89
Control Electronics PCBA Jumper Locations89
Standard Jumper Configuration90
Recommended Spare Parts List97
Drawings and Schematics99

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MPI 40 Series Specifications

General

Brand	MPI
Model	40 Series
Category	Floppy Disk Drive
Language	English

MPI 40 Series - User Manual

Table of Contents

MPI 40 Series Specifications