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5444
Manual
IBM 5444 Manual
Disk storage drive field engineering theory-maintenance
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Contents
Table of Contents
Bookmarks
Table of Contents
Table of Contents
Part 1. Theory DC Box
Differences between Models
IBM 5444 Disk Storage Drive
Machine Description
Machine Operations
Machine Safety and Data Protection
Major Units
Start/Stop Sequence
Alternate Cylinder Assignment
Carriage Movement
CE Cylinder
Data Organization
Machine Control from the Using System
Manual Control of the 5444
Read/Write Operations
Sector Format
Track Format
Chapter 2. Functional Units • 1
Component Layout - Top View
Base
Air Circulation System
Drive Mechanism
Component Layout - Underside View
Motor Drive Schematic
Drive Spindle
Drive Motor
DC Braking
Anti-Static Brush
Recording Disks
Fixed Disk
5440 Disk Cartridge
Removable Disk
Lower Disk Hub Assembly
Cartridge Clamp Arms
Cartridge Handle
Upper Disk Hub Assembly
Disk Cartridge Handling and Storage
Disk Cleaning Brushes
Brush Microswitches
Cartridge Handle and Release Catch
Brush Motor
Actuator
Carriage
Actuator Mechanism
Disk Cleaning Brushes Linkage Mechanism
Disk Cleaning
Detent Mechanism
Voice Coil
Carriage and Actuator Assembly - Without Heads
Head/Arm Assembly
Read/Write Head
Head Support Arm
Flying the Heads
Head/Write Signal Level
Head Load Mechanism
Head Load Solenoid Assembly
Head Assembly
Head Load Linkage
Knock-Off Mechanism
AC Box
Head Load Solenoid Assembly
Head Load Solenoid Circuit
Knock-Off Mechanism
Interlock Switch Circuits
Track Crossing Sensor/Fine Home Sensor
Carriage Photocell
Carriage Photocell Signals
Track 000 Indication
Read/Write Head
Start-Up Sequence - Timing
Access Control Signals
Single Track Head Movement - Operation Sequence
Home Detection Logic
Head Movement Error Logic
CE Control Logic
Machine Stop Logic
Derivation of Composite Write Signal
Basic Read/Write Head
Horizontal Recording
Horizontal Reading
Write Circuit - Logic
Write Circuit - Waveforms
Read Circuit - Logic
Read Circuit - Waveforms
Input Power Lines
CE Control Panel
Part 2. Maintenance
Reference Data and Diagnostic Techniques
Section Reference Dat a
Functional Characteristics
Format
Speed
Interface
Sector Format
Typical Sector and Track Formats
Section 2. Diagnostic Techniques
Approach to Servicing
Major Functional Areas
Error Conditions
Error Recovery Procedures
Error Recovery Procedure - Suspected HDI on
Error Recovery Procedure - R/W Head 2 or
Error Recovery Procedure - R/W Head 2 or
Chapter 2. Console and Maintenance Facilities
Basic Unit
Console
CE Panel
CE Mode-Select Switch
Forward/Reverse Switch
CE Tools and Their Use
Branch Office/Support Center Tools
Customer Installation Tools
Tools Use
Detent Yoke Holdout
MAP Charts
TAP Lines
Section 2. Features
Chapter 3. Preventive Maintenance
Section 1. Basic Unit
Approach to Preventive Maintenance
Visual Inspection
Electronic Units
Mechanical Units
Cleanliness
PM Procedures
PM Routine Chart
Voice Coil Assembly
Lubrication Details
PM Locations
Carriage Slides and Leadscrew Lubrication
Read/Write Heads
Detent Assembly Lubrication
Conditions of Read/Write Heads
Chapter 4. Checks, Adjustments, and Removals
Disks
Ll Inspection - General
Removable Disk (5440 Disk Cartridge)
Fixed Disk
Runout Check - Removable Disk
Disk Height and Runout Checks - Fixed Disk
Replacement Details - New Fixed Disk
Base Assembly
Cartridge Clamp Arm Replacement
Cartridge Interlock Switches
Upper Index Transducer
Adjusting Cartridge Interlock Switches
Upper Index Transducer - Vertical and
Upper Index Transducer - Circumferential
Lower Index Transducer
Air Filter
Changing Drive Motor
Changing Drive Belt
Spindle Assembly
Disk Cleaning Brushes
Brush Arm Assembly
Brush MID-Cycle Switch and Brush Cycle-Complete Switch
Brush Motor
Actuator Assembly
Actuator Components - Handling
Actuator Carriage Assembly
Replacement Actuator Assembly- Limit Stop (5444 Model 1)
Actuator Assembly Alignment
Replacement Actuator Assembly - R/W Heads (5444 Model 3)
Access Mechanism
Layshaft
Layshaft Assembly (EC Level 391962)
Drive Tire
Checking Tire Wear
Drive Disk
Clutch Adjustment and Checking
Forward and Reverse Clutches
Drive Disk Adjustment
Track-Crossing and Fine-Home Photocell Assembly
Carriage Photocell Assembly
Carriage Interlock Switches
Photocell Assembly - Adjustment and Details
Carriage Interlock Switch Adjustment
Detent Mechanism
Detent Wheel
Voice Coil Assembly
Pawl Bracket Assemblies
R/W Head Arm Assembly
Checks, Adjustments, and Removals
Cleaning R/W Heads
Head-Load Mechanism
Head-Load Cable
Head-Load Solenoid and Lever
Head-Load Cable Adjustment
Solenoid Switches
Head-Load Solenoid Switch Adjustment
Head-Load Spring Shafts
Head-Load Spring Shafts - Link Adjustment
Knock-Off Trip Adjustment
Auxiliary Electronics
Fault Finding
Index Transducer Checks
Detent Voice Coil Control
Section 2. Features
Index Transducer Waveform Check
Detent Voice Coil Waveforms
Power
Section Basic Unit
General
AC Power
Protective Devices
Regulators
Checking
Underside View of 5444 - Locations
Power Supply Change - Components to be
False Latch Setup
Disk Enclosure Locations for IBM System/3
Conversion Table - Inches into Millimeters and Centimeters
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Field Engineering
Theory-Maintenance
Disk Storage Drive
(Machines with serial no. up ta 30100)
s y
33-0026-0
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