CORVUS 20MB Vintage Hard Drive Manuals

Manuals and User Guides for CORVUS 20MB Vintage Hard Drive. We have 1 CORVUS 20MB Vintage Hard Drive manual available for free PDF download: Service Manual

CORVUS 20MB Service Manual

CORVUS 20MB Service Manual (173 pages)

EIGHT-INCH WINCHESTER DISK DRIVE

Brand: CORVUS | Category: Storage | Size: 10 MB

Table of Contents

Table of Contents

5
List of Illustrations and Tables

10
- Chapter 1 - General Description
  
  14
  - Introduction
    15
  - Model Identification
    15
  - Purpose of Equipment
    15
    
    Data Backup
    16
    
    Power Supply
    16
  - Scope of Chapter
    15
  - Corvus Disk System
    16
  - Winchester Technology
    16
- Chapter 2 Installation
  
  17
  - Introduction
    18
  - Receiving a Drive
    18
    
    Headlock Mechanisms
    18
    
    Diagnostic Test
    19
    
    Manual Carriagelock Location
    19
  - Scope of Chapter
    18
  - Installation Considerations
    20
    
    CORCOM Unit
    20
  - Daisy-Chaining of Disk Drives
    21
    
    Rear Bezel Components
    21
    
    Unit Address Options
    22
- Chapter 3 Operation
  
  23
  - Controls
    24
    
    Front Bezel Leos
    24
    
    Front Bezel Switches
    25
    
    Function Switches
    25
  - Introduction
    24
  - Scope of Chapter
    24
  - Environmental Requirements
    26
    
    Line Noise
    26
    
    Static Electricity
    26
    
    Temperature
    26
  - Periodic Maintenance
    26
    
    Groundstrap
    27
    
    Regular Checks
    27
  - Power-On Sequence
    26
- Chapter 4 Drive Description
  
  28
  - Introduction
    29
  - Power Supply
    29
    
    Cp129
    29
    
    Cp140
    29
    
    Stand-Alone Drive with CP129 Power Supply
    31
    
    Cp411
    33
  - Scope of Chapter
    29
  - Definition of Terms
    33
    
    Data Configuration
    33
    
    Disk Drive Sealed Mechanism
    34
    
    Controller Firmware
    35
    
    Data Storage
    35
    
    Disk Sealed Mechanism
    35
    
    Sector Interleaving
    35
    
    Drive Electronics Revision
    36
    
    Headlock Devices
    36
    
    Preamp PCA
    36
  - Power-Up
    37
  - Introduction
    39
  - Scope of Chapter
    39
  - Servo Electronics
    39
    
    Servo Tracks
    39
    
    Tri-Bit Signal
    40
    
    Corvus Revb Block Diagram
    41
    
    Servo Control Signals
    42
    
    Servo Operation
    42
  - Read/Write Electronics
    42
    
    Read Operation
    43
    
    Read/Write PCA Jumper Location
    43
    
    Write Operation
    43
  - Controller/Logic Electronics
    44
    
    Host to Drive Handshaking Controi Signais
    44
    
    Controller During Read and Write Commands
    45
    
    Controller During Seek Command
    45
  - Backplane/Motherboard PCA
    46
  - Preamp PCA
    46
  - Interface PCA
    48
  - Paddleboard PCA
    48
- Chapter 6 Disassembly
  
  49
  - Introduction
    50
    
    Rear Bezel
    50
    
    Tools Required
    50
    
    Top Cover
    50
    
    Access Door, Metal Package
    51
    
    Backplane Cover
    52
    
    Cabling
    52
    
    Drive Mechanism
    52
    
    Front Bezel
    52
    
    Power Supply
    52
  - Scope of Chapter
    50
  - Drive Electronics Removal and Disassembly
    52
    
    Card Set
    53
    
    PCA Replacement
    53
  - Stand-Alone Units
    52
    
    Disassembly (CSIOO)
    52
- Chapter 7 - Adjustments and Maintenance
  
  54
  - Introduction
    55
  - Power Supply Voltage Check and Adjustment
    55
    
    CP140 and CP411
    55
    
    Voltage Check
    55
    
    Corvus Dealer Service
    56
    
    Voltage Adjustment
    56
    
    Cp129
    57
    
    Cs100
    57
    
    Voltage Adjustment
    57
    
    Voltage Check
    57
  - Scope of Chapter
    55
  - Servo Mechanism
    58
    
    Servo Adjustment ASM 310006
    60
  - Brake Mechanism
    61
    
    Brake Adjustment
    61
    
    Mechanism Adjustment
    62
- Chapter 8 - Dealer Service Diagnostics
  
  63
  - Drive Diagnostics Revb
    64
    
    Crc
    64
    
    Exr
    64
    
    Fmt
    65
    
    Mux
    65
    
    Prm
    65
    
    Vsn
    65
    
    Drive
    66
    
    Quit
    66
    
    Set
    66
  - Introduction
    64
  - Scope of Chapter
    64
  - Controller Diagnostic
    66
    
    A) Abort Diagnostic
    67
    
    B) Macro Menu
    67
    
    Controller Diagnostic Commands
    67
    
    General Description
    67
    
    C) Change Slot Number
    68
    
    D) Download Diagnostic
    68
    
    I) Analyze Servo
    68
    
    J) Single Do Seek
    68
    
    L) Full Cylinder Loopseek
    69
    
    P) Print Quiet Summary Report
    69
    
    Q) Sector Quiet Program
    69
    
    S) Read Scan Disk
    69
    
    Error Codes
    70
    
    Single Cylinder Seek Scan
    70
    
    X) Write Scan Disk
    70
    
    Y) Rezero Heads
    70
    
    C)Ont L)Ist R)Estart Q)Uit
    71
  - Read Burn-In Results
    71
    
    Signed Decimal Disk Error Codes
    78
    
    Location of R3
    81
    
    Checking Proper Headlock Operation
    86
    
    Front Bezel
    89
List of Schematic and Assembly Drawings

103
- Assembly Dwg, Metal Cabinet
  104
- Assembly Dwg, Detail
  105
- Assembly Dwg, Front Bezel
  106
- Assembly Dwg, Rear Bezel
  107
- Schematic, Paddleboard PCA
  112
- Assembly Dwg, Paddleboard II
  113
- Assembly Dwg, CP140 Power Supply
  115
- Schematic Dwg, CP140 Power Supply (1 of 2)
  116
- Schematic Dwg, CP140 Power Supply (2 of 2)
  116
- Assembly Dwg, CP411 Power Supply
  119
- Schematic Dwg, CP411 Power Supply (1 of 2)
  120
- Schematic Dwg, CP411 Power Supply (2 of 2)
  121
- Schematic Dwg, ASM 310001 (1 of 4)
  128
- Schematic Dwg, ASM 310001 (3 of 4)
  128
- Schematic Dwg, ASM 310001 (4 of 4)
  130
- Assembly Dwg, ASM 310001
  137
- Schematic Dwg, ASM 310101 (1 of 3)
  138
- Schematic Dwg, ASM 310101 (2 of 3)
  139
- Assembly Dwg, ASM 310221
  141
- Schematic Dwg, ASM 310071 (1 of 3)
  146
- Schematic Dwg, ASM 310071 (2 of 3)
  146
- Schematic Dwg, ASM 310176 (2 of 3)
  146
- Schematic Dwg, ASM 310176 (3 of 3)
  146

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