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IBM 5444 manual available for free PDF download: Manual
IBM 5444 Manual (97 pages)
Disk Storage Drive Field Engineering Theory-Maintenance
Brand:
IBM
| Category:
Computer Hardware
| Size: 8 MB
Table of Contents
Table of Contents
4
Part 1. Theory DC Box
8
Differences between Models
9
IBM 5444 Disk Storage Drive
9
Machine Description
9
Machine Operations
9
Machine Safety and Data Protection
9
Major Units
9
Start/Stop Sequence
9
Alternate Cylinder Assignment
10
Carriage Movement
10
CE Cylinder
10
Data Organization
10
Machine Control from the Using System
10
Manual Control of the 5444
10
Read/Write Operations
10
Sector Format
10
Track Format
10
Chapter 2. Functional Units • 1
12
Component Layout - Top View
12
Base
13
Air Circulation System
13
Drive Mechanism
13
Component Layout - Underside View
13
Motor Drive Schematic
13
Drive Spindle
14
Drive Motor
14
DC Braking
14
Anti-Static Brush
14
Recording Disks
14
Fixed Disk
14
5440 Disk Cartridge
14
Removable Disk
14
Lower Disk Hub Assembly
14
Cartridge Clamp Arms
15
Cartridge Handle
15
Upper Disk Hub Assembly
15
Disk Cartridge Handling and Storage
16
Disk Cleaning Brushes
16
Brush Microswitches
16
Cartridge Handle and Release Catch
16
Brush Motor
17
Actuator
17
Carriage
17
Actuator Mechanism
17
Disk Cleaning Brushes Linkage Mechanism
17
Disk Cleaning
17
Detent Mechanism
18
Voice Coil
18
Carriage and Actuator Assembly - Without Heads
18
Head/Arm Assembly
19
Read/Write Head
19
Head Support Arm
20
Flying the Heads
20
Head/Write Signal Level
20
Head Load Mechanism
21
Head Load Solenoid Assembly
21
Head Assembly
21
Head Load Linkage
21
Knock-Off Mechanism
22
AC Box
22
Head Load Solenoid Assembly
22
Head Load Solenoid Circuit
22
Knock-Off Mechanism
23
Interlock Switch Circuits
24
Track Crossing Sensor/Fine Home Sensor
26
Carriage Photocell
26
Carriage Photocell Signals
26
Track 000 Indication
27
Read/Write Head
30
Start-Up Sequence - Timing
30
Access Control Signals
32
Single Track Head Movement - Operation Sequence
32
Home Detection Logic
33
Head Movement Error Logic
33
CE Control Logic
34
Machine Stop Logic
35
Derivation of Composite Write Signal
35
Basic Read/Write Head
36
Horizontal Recording
36
Horizontal Reading
36
Write Circuit - Logic
37
Write Circuit - Waveforms
37
Read Circuit - Logic
38
Read Circuit - Waveforms
39
Input Power Lines
41
CE Control Panel
42
Part 2. Maintenance
44
Reference Data and Diagnostic Techniques
45
Section Reference Dat a
45
Functional Characteristics
45
Format
45
Speed
45
Interface
45
Sector Format
45
Typical Sector and Track Formats
45
Section 2. Diagnostic Techniques
46
Approach to Servicing
46
Major Functional Areas
46
Error Conditions
46
Error Recovery Procedures
46
Error Recovery Procedure - Suspected HDI on
49
Error Recovery Procedure - R/W Head 2 or
50
Error Recovery Procedure - R/W Head 2 or
51
Chapter 2. Console and Maintenance Facilities
52
Basic Unit
52
Console
52
CE Panel
52
CE Mode-Select Switch
52
Forward/Reverse Switch
52
CE Tools and Their Use
52
Branch Office/Support Center Tools
52
Customer Installation Tools
52
Tools Use
52
Detent Yoke Holdout
53
MAP Charts
53
TAP Lines
53
Section 2. Features
53
Chapter 3. Preventive Maintenance
54
Section 1. Basic Unit
54
Approach to Preventive Maintenance
54
Visual Inspection
54
Electronic Units
54
Mechanical Units
54
Cleanliness
54
PM Procedures
54
PM Routine Chart
54
Voice Coil Assembly
54
Lubrication Details
55
PM Locations
55
Carriage Slides and Leadscrew Lubrication
55
Read/Write Heads
56
Detent Assembly Lubrication
56
Conditions of Read/Write Heads
56
Chapter 4. Checks, Adjustments, and Removals
57
Disks
57
Ll Inspection - General
57
Removable Disk (5440 Disk Cartridge)
57
Fixed Disk
58
Runout Check - Removable Disk
58
Disk Height and Runout Checks - Fixed Disk
58
Replacement Details - New Fixed Disk
59
Base Assembly
60
Cartridge Clamp Arm Replacement
60
Cartridge Interlock Switches
60
Upper Index Transducer
60
Adjusting Cartridge Interlock Switches
60
Upper Index Transducer - Vertical and
60
Upper Index Transducer - Circumferential
61
Lower Index Transducer
62
Air Filter
62
Changing Drive Motor
62
Changing Drive Belt
63
Spindle Assembly
63
Disk Cleaning Brushes
64
Brush Arm Assembly
64
Brush MID-Cycle Switch and Brush Cycle-Complete Switch
64
Brush Motor
64
Actuator Assembly
66
Actuator Components - Handling
66
Actuator Carriage Assembly
66
Replacement Actuator Assembly- Limit Stop (5444 Model 1)
67
Actuator Assembly Alignment
67
Replacement Actuator Assembly - R/W Heads (5444 Model 3)
68
Access Mechanism
68
Layshaft
68
Layshaft Assembly (EC Level 391962)
68
Drive Tire
69
Checking Tire Wear
69
Drive Disk
70
Clutch Adjustment and Checking
70
Forward and Reverse Clutches
71
Drive Disk Adjustment
71
Track-Crossing and Fine-Home Photocell Assembly
72
Carriage Photocell Assembly
72
Carriage Interlock Switches
72
Photocell Assembly - Adjustment and Details
72
Carriage Interlock Switch Adjustment
72
Detent Mechanism
73
Detent Wheel
73
Voice Coil Assembly
73
Pawl Bracket Assemblies
74
R/W Head Arm Assembly
74
Checks, Adjustments, and Removals
74
Cleaning R/W Heads
75
Head-Load Mechanism
77
Head-Load Cable
77
Head-Load Solenoid and Lever
77
Head-Load Cable Adjustment
77
Solenoid Switches
78
Head-Load Solenoid Switch Adjustment
78
Head-Load Spring Shafts
79
Head-Load Spring Shafts - Link Adjustment
79
Knock-Off Trip Adjustment
80
Auxiliary Electronics
80
Fault Finding
80
Index Transducer Checks
80
Detent Voice Coil Control
80
Section 2. Features
80
Index Transducer Waveform Check
81
Detent Voice Coil Waveforms
81
Power
82
Section Basic Unit
82
General
82
AC Power
82
Protective Devices
82
Regulators
82
Checking
82
Underside View of 5444 - Locations
85
Power Supply Change - Components to be
87
False Latch Setup
88
Disk Enclosure Locations for IBM System/3
89
Conversion Table - Inches into Millimeters and Centimeters
90
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