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Manuals
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Tandon Manuals
Floppy Disk Drive
TM848-1
Operating and service manual
Tandon TM848-1 Operating And Service Manual
Oem disk drives 48 tracks per inc
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:
Operating and service manual
(90 pages)
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
1 Introduction
Functional Description of the Drive
Physical Description of the Drive
Purpose of the Drive
Section I
Introduction Tothetm848 Familyof Disk Drives
Diskettes
Incoming Inspection Checks and Procedures
Interface Circuit Specifications
Mechanical and Electrical Sepcifications
Mechanical and Electrical Specifications
Power Requirements
Interface Connections
Mounting the Drive
Cooling System Requirements
Diskette Care, Handling and Storage
Dust Cover
Hardware "1-6
TM848 Disk Drive Mounting Configuration
Components of the Drive
Operation of the Drive
Organization of the Drive
Write Protect
Drive Status Logic
Index Pulse
Data Electronics
Positioner Control
Spindle Drive System
TM848 Disk Drive Functional Block Diagram
FM Recording Magnetization Profiles
Write Operation Timing Diagram
Interface Electronics
Interface Connector Pin Assignments, P13
Power Connector Pin Assignments
Read Timing Diagram
Drive Select
Input Line Terminations from Removable Resistor Pack
Power Connector Pin Assignments
Program Shunt
Terminated Lines
Circuit Board Assembly
General Control and Data Timing Requirements
Options
Drive Select DS1--DS4
Side Select Options Using Drive Select
User-Selectable Options
In Use from Drive Select
In Use from Head Load
Radial Ready
Ready Alternate Output Pad
Radial Index
Radial Ready Installation
Ready Modified
Disk Change
Diskette Lever Lock Latch Option
In Use Altenate Output Pad
Index Alternate Output Pad
Radial Index Installation
Two-Sided Diskette Installed
1.19.19 Allow Write When Write Protected
Radial Head Load Signal
Head Side Select Options S1--S3
Spindle Motor Control Options
Motor Control Select Options MC1--MC4
Maintenance Checks and Adjustments
Head Load Alternate Output Pad Option
Inhibit Write When Write Protected
Radial Head Load Signal Option
Stepper Power from Drive Select
Stepper Power from Head Load Line
2 Introduction
Long-Term Drive Motor Speed Checks and Adjustments
Spindle Drive Motor Checks and Adjustments
Cats Eye Alignment Check and Adjustment
Circuit Board Assembly
Hub Center Line and Track Locations
Cats Eye Alignment Check
Cats Eye Pattern
Head Carriage Adjustment
Head Module Retaining and Cam Screws
Index Sensor Checks and Adjustments
Index-To-Data Burst Checks
Index Sensor Adjustment
Index-To-Data Burst
Index Sensor's Retaining Screw and Adjustment
Index Pulse Width Check
Track 00 Sensor Check and Adjustment
Negative Going Pulse Width
Amplitude Check
Azimuth Check
Optimum Head Azimuth Alignment
Load Arm Adjustment
Load Arm Adjustment, Front View
Printed Circuit Board Operation
Interface Electronics Specifications
Printed Circuit Board
Interface Configuration
3 Introduction
Physical Description of the Circuit Board
Input Control Lines
Drive Interface Lines and Pin Connectors
Stepper Logic Truth Table
Write Data Circuit Block Diagram
Trim Erase Diagram
Side Select Schematic Diagram
Output Control Lines
Index Schematic Diagram
Track 00 Schematic Diagram
Write Protect Schematic Diagram
Read Circuit Block Diagram
Troubleshooting Guide
4 Introduction
Not Ready And/Or no Index
Will Not Seek or Restore
Will Not Read
Will Not Write
Activity L.E.D. Inoperative
Drive Motor will Not Start When Door Latched
Drive Belt
5 Introduction
Replacement Procedures
Drive Motor
Drive Belt and Spindle
Circuit Board
Drive Motor and Related Parts
Cone Assembly
Circuit Board Mounting Screws
Cone Assembly Key Parts
Cone Assembly Parts
Bridge Assembly
Diskette Lever Key Parts
Diskette Lever Adjustment
Bridge Assembly Key Parts
Diskette Lever
Bezel
Bridge Assembly Additional Key Parts
Bezel and Related Parts
Activity L, E, D
Load Arm Assembly
Load Arm Assembly Key Parts
Write Protect Sensor Assembly
Track 00 Sensor Assembly Key Parts
Track 00 Sensor Assembly
Door Switch Assembly
Write Protect Sensor Assembly Key Parts
Door Switch Assembly Key Parts
Index Sensor Assembly
Index Sensor Assembly Key Parts, Top View
Diskette Ejector Assembly
Index Sensor Assembly Key Parts, Bottom View
Load Resistor Assembly
Diskette Ejector Assembly Key Parts
Load Resistor Assembly and Key Parts
Stepper Band
Stepper Band Key Parts
Stepper Motor Assembly
Stepper Band Additional Key Parts
Head Carriage Assembly
Stepper Motor Assembly Key Parts
Drawings
Appendix I Printed Circuit Board Schematics and Assembly
Appendix II Recommended Spare Parts List
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OEM
OPERATING AND SERVICE MANUAL
TM848-1 AND TM848-2 DISK DRIVES
48 TRACKS PER INCH
'anCion
CORPORATION
20320 PRAI RI E STREET
CHATSWORTH, CA 91311
TELEPHONE NO.:
(213) 993-6644
TWX NO.:
910 494 1721
TEL.EX NO.:
194794
COPYRIGHT 1982 TANDON CORPORATION
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