Table Of Contents - IBM System/32 Introduction And Maintenance Manual

CONTENTS
LIST OF ABBREVIATIONS.
xi
2.1.15 Write Safety 2-7
Data Unsafe Conditions 2-7
CE SAFETY PRACTICES. xiii
File Ready.
2-7
Disk Speed. 2-7
1.0.0 INTRODUCTION 1-1
Power Up 2-7
1.1.0 DESCRIPTION 1-1
2.1.16 Seek Operation 2-8
1.2.0 BASIC CONFIGURATION 1-2
2.1.17 Recalibrate Operation 2-8
1.3.0
SYSTEM DATA FLOW 1-3 2.1.18 Behind Home . 2-8
1.4.0 PROCESSING UNIT DATA FLOW 1-4
2.1.19 Servo Track Following .
2-9
1.5.0 CHANNEL DATA FLOW. 1-5 2.2.0
MAl NTENANCE .
2-10
1.6.0 SYSTEM MICROPROGRAM. 1-6
2.2.1
Card Sockets 2-10
1.7.0 CONTROL STORAGE. 1-7 2.2.2
Disk Enclosure (DE)
2-12
1.8.0 FUNCTIONAL UNITS. 1-8 2.2.3
Disk Drive Motor
2-14
1.8.1 Main Storage (MS) 1-8 2.2.3.1 Old Style Motor 2-14
1.8.2 Control Storage (CS) 1-8 2.2.3.2 New Style Motor . 2-16
1.'8.3 Storage Address Register (SAR) . 1-8 2.2.3.3 Motor Start Relay 2-16.2
1.8.4 Micro Operation Register (MaR) 1-8
2.2.4 Brake Assembly and Brake Coil
1.8.5
Process Condition Register (PCR) 1-8
Assembly. 2-16.4
1.8.6
Storage Data Register (SD R) . 1-8
2.2.5 Brake Assembly
2-18
1.8.7 X and Y Registers
1-8
2.2.6
Motor Antistatic Brush . 2-20
1.8.8 Arithmetic Logical Unit (ALU) 1-8
2.2.7 Spindle Antistatic Brush 2-20
1.8.9 Local Storage Registers (LSR) 1-9 2.2.8
Disk Speed Transducer . 2-21
1.9.0 INITIAL SYSTEM CHECKOUT.
1-10
2.2.9 Motor Tension Spring
2-23
1.10.0
EVENT INDICATOR SEQUENCE. 1-10
2.2.10 Shock Mount (Top One)
2-24
1.11.0 MICRO INTERRUPTS. 1-11 2.2.11 Shock Mounts (Bottom Two)
2-24
1.12.0
SYSTEM PARITY CHECKING AND 2.3.0
CABLE AND CARD LOCATIONS. 2-26
PARITY GENERATION.
1-12
1.13.0
I/O PARITY CHECKING AND 3.0.0 33FD DISKETTE DRIVE.
3-1
GENERATION. 1-13 3.1.0 THEORY 3-1
1.14.0
OPERATION RETRY AND ERROR 3.1.1 33FD Description
3-2
LOGGING 1-14 3.1.2 Diskette Format .
3-4
1.15.0 LOCATIONS.
1-15
3.1.3 Operating Sequences 3-6
1.16.0
BOARD PIN LOCATIONS 1-16 Initialization
3-6
Seek.
3-6
2.0.0
DISK DRIVE 2-1 Read or Write .
3-6
2.1.0 THEORY
2-1 3.1.4
Read/Write Circuit Principles. 3-8
2.1.1
Introduction 2-1 3.2.0 MAl NTENANCE .
3-9
2.1.2
Subframe 2-1
3.2.1 Machine Safety
3-9
2.1.3 Grounding.
2-1
3.2.2 Tools
3-9
2.1.4
Disk Enclosure 2-2
3.2.3 Head Cleaning Tools (3.2.10) . 3-9
2.1.5
Disk Spindle 2-2
3.2.3.1 Pressure Pad Replacement Kit
3-9
2.1.6 Transducer.
2-2
3.2.4 Diskette Care . 3-10
2.1.7 Actuator
2-3
Handling
3-10
2.1.8 Actuator Lock
2-3
Long Term Storage 3-10
2.1.9
Actuator Position Indicator 2-3
Shipping and Receiving.
3-10
2.1.10 Circuitry Location
2-3
Inserting and Removing the
2.1.11 Disk Description .
2-4
Diskette
3-10
Data Tracks
2-4
3.2.5 33FD Diskette Drive 3-11
Servo Tracks
2-4
3.2.6 Latch Assembly
3-12
2.1.12 Landing Zone (LZ) 2-4
3.2.7
Collet 3-12
2.1.13
Guard Band (GB) . 2-4
3.2.8 Cover Assembly
3-12
2.1.14 Motor and Brake . 2-5
3.2.9 Pressure Pad Actuator 3-13
Sector Format 2-6
3.2.10 Head and Pressure Pad Cleaning
3-13
Contents
iii
TNL: SN31-0487 to SY31-0373-4 (25 Nov 77)