Quantum Q2080 Manuals

Manuals and User Guides for Quantum Q2080. We have 1 Quantum Q2080 manual available for free PDF download: Product Description

Quantum Q2080 Product Description

Quantum Q2080 Product Description (99 pages)

8" Media Fixed Disk Drive

Brand: Quantum | Category: Storage | Size: 7.79 MB

Table of Contents

Table of Contents
5
Section I - PRINCIPLES of OPERATION
9
- Model Q2080 Block Diagram
  9
- Model Q2080 Drive Mechanism
  9
  - Drive Mechanism Block Diagram
    10
  - Optical Encoder
    10
  - Rotary Positioner Assembly
    10
  - Head Stack Assembly
    10
- Model Q2080 Mechanical Layout
  10
  - Disk Stack Assembly
    11
  - Base Casting Assembly
    11
  - Acdrivemotor
    11
  - DC Drive Motor
    11
  - Air Filtration
    12
- DC Drive Motor Current Profile
  12
  - Automatic Actuator Lock
    13
- Air Filtration System
  13
- Model Q2080 Drive Electronics
  14
  - General Features
    14
- Drive Electronics Block Diagram
  15
  - Encoder Board
    16
    
    Encoder PCB
    16
- Encoder PCB Block Diagram
  16
  - Drive Control Board
    17
- Drive Control PCBA Block Diagram
  17
  - AGC Circuit
    18
- Simplified AGC Circuit
  18
  - PI and P2 Generation
    19
  - Coarse Seek Positioning
    20
- Actuator Current During Seek
  20
  - Actuator Drive Circuits
    21
- Angular Positioning: PI Vs. P2
  21
- Actuator Drive Block Diagram
  22
- Actuator Enable Driver
  23
- Actuator Compensator
  24
- Actuator Drive Circuits
  25
  - Servo Read and Conversion Circuits
    27
- Actuator Drive Circuit Voltage/Current Relationship
  27
Servo Bursts
27
- Servo Wedges
  28
- Servo Circuitry Block Diagram
  28
- Servo Read Amp and Filter Circuits
  29
- Servo Peak Detector
  29
- Servo AID Conversion
  30
- AID Reset
  30
  - Data Interface
    31
MFM Write Data Timing
31
MFM Read Data Timing
31
- Head Switching Matrix
  32
- Write Data Circuits
  32
Write CKT Block Diagram
33
Write Enable Switch
34
Write Data Receiver and Switch
35
- Read Data Circuits
  36
Write Current Detector
36
Read Channel Block Diagram
37
Read Droop and Droop Ignore
37
Read Channel Front End
38
- Microprocessor Circuits
  40
- Index Generation
  40
Microprocessor Circuits Block Diagram
40
Index Generation
41
Index Comparator
41
Index Separator
42
Timing Relationships between Index Signals
42
- Control Signal Interface
  43
Reset One-Shot
43
Normal Step Mode Timing
43
Burst Step Mode Timing
44
Index Timing
45
General Control Timing Requirements
45
Section II - LOGIC CONVENTIONS and CIRCUIT DIAGRAMS
47
- General Discussion
  47
- Logic Symbology
  47
- Component Locations
  47
- Circuit Diagrams
  47
Power Interface Circuits
48
Write Data Circuits
48
Read Data Circuits
48
Actuator Driver Circuits
48
Microprocessor Circuits
48
Servo Burst and Index Circuits
48
Section III - APPLICATIONS
56
- Introduction
  56
- Power on Recalibration Sequence
  56
- Interface
  56
- Errors and Media Defects
  56
  - Errors
    56
  - Defect Detection and Reporting
    57
  - Media Quality Criteria
    57
  - Self Diagnostics
    57
  - Track Formatting
    57
    
    Introduction
    57
    
    Track Format
    57
Sample Track Format
58
- Write Pre-Compensation
  59
- Magnetic Coupling
  60
Magnetic Induced EMI Error
60
- Ground Current Coupling
  61
Current Flow through Chassis
61
Ground Induced EMI Error
61
Connecting Drive Ground to Chassis
62
Maintenance
63
- General Information
  63
- Maintenance Precautions
  63
- Preventive Maintenance
  63
- Maintenance Procedures
  63
  - Level 1 Maintenance
    63
Voltage and Frequency Parts
64
Connector Locations
66
- Level 2 Maintenance
  67
Illustrated Parts Breakdown
68
- General Discussion
  68
- Major Assemblies
  68
- Sub-Assemblies
  68
- Printed Circuit Boards
  68
  - Drive Control PCB
    68
Encoder PCB Circuits
68
Major Assemblies
69
Exploded Drive Assembly
72
Power Op Amp Assembly Part Number 20-20816
73
Actuator Sub-Assembly
75
Spindle and Disk Sub-Assembly
77
Head Arm Sub-Assembly
79
Cabinet Sub-Assembly
81
AC Drive Motor
83
DC Drive Motor Assembly
84
Bubble Sub-Assembly
87
Encoder PCB Assembly
89
Drive Control PCB Assembly
92

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