HP 9895A Manuals

Manuals and User Guides for HP 9895A. We have 2 HP 9895A manuals available for free PDF download: Service Manual

HP 9895A Service Manual (147 pages)

Flexible Disc Memory

Brand: HP | Category: Storage | Size: 4.92 MB

Table of Contents
2
Specifications
9
Safety Considerations
12
Chapter 1: General Information

15
- Introduction
  15
- General Description
  15
- Service Support Package
  17
- 1-1. PSP Contents
  17
- FSI Contents
  18
  - Options
    19
  - Equipment Supplied
    19
  - Accessories Available
    20
  - Installation
    21
    
    Power Requirements
    21
- Line Voltage Selector Switches
  21
  - Fuses
    22
  - Addressing
    22
- Bus Address Selector Switch
  22
- Setting the Drive Number
  23
  - Self-Test
    24
- LED Display
  24
- Self-Test Functions
  25
  - 9895A Installation Procedure
    26
  - Flexible Disc Use
    28
    
    Introduction
    28
    
    Disc Loading
    28
    
    Disc Handling Precautions
    28
    
    Write Protect
    29
- Write Enable Method
  29
  - Operator Controls
    30
  - Reset Caused by Line Voltage Reduction
    30
Chapter 2: Theory of Operation

31
- Introduction
  31
- Controller Module Theory of Operation
  31
  - General Description
    31
  - Controller Interface to HP-16 (PHI Chip)
    33
  - Processor and Memory
    33
  - Read Operation
    34
  - Write Operation
    34
  - Error Detection
    34
  - Seek Operation
    35
- Drive Theory of Operation
  35
  - Introduction
    35
  - General Description
    35
- Control, Status and Data Lines between the Controller and Drive Electronics
  36
  - Power Supply Theory of Operation
    39
    
    Introduction
    39
    
    General Description
    39
  - Functional Characteristics and Communication Protocol
    40
    
    Format Similarities
    40
- Track Format
  41
  - Format Differences
    42
- Hewlett-Packard Standard Sector Recording Format
  44
Chapter 3: Maintenance

47
- Introduction
  47
- Standard Test Equipment
  48
- Special Tools
  48
  - Disassembly Procedures
    49
    
    Introduction
    49
    
    Cover Panels
    49
    
    Controller Module
    49
    
    Drive Module
    50
    
    Fan Compartment
    50
- Controller Board Guide Adjustment
  50
  - Power Module
    51
  - Drive Electronics Board
    51
  - Drive Motor Assembly
    51
  - Front Plate
    52
  - Maintenance
    52
    
    Introduction
    52
    
    Troubleshooting
    52
- Detector Functions
  54
- Adjustment Test Points
  54
- Differential Read Signal for Entire Track
  55
- Differential Read Signal for Portion of Outer Track
  55
  - Corrective Maintenance Procedures
    56
    
    Index-To-Burst Check and Adjustment
    56
- Head-Unload Clearance
  56
- Adjustment Reference List
  56
  - Radial Alignment
    58
- Index Pulse to Write-Splice Bit Timing
  58
- Drive Electronics Board Layout Diagram
  59
  - Door-Closed Switch Adjustment
    62
  - Track 0 Optical Sensor Adjustment
    62
- Track 0 Optical Sensor Output
  62
  - Disc Ejector
    63
- Stepper Motor Mount Screws and Ejector Assembly
  63
- Ejector, Latch and Latch Block
  63
  - Disc-Load-Pad Adjustment
    64
  - Head-Unload Clearance
    64
- Load-Pad Adjustment
  64
Chapter 4: Status Display Board Diagnosis

69
- Introduction
  69
- General Description of Diagnosis Method
  69
- Self-Test Initiation
  70
- Test Selection
  70
  - Default Self-Test
    70
  - Read-Only Self-Test
    70
  - Write Read Self-Test
    70
- Using the Status Display Board for Failure Analysis
  72
- Obtaining Test Results from LED Display
  72
- 09895-66506 Status Display Board
  73
  - Error Rate Testing with the Status Display Board
    74
- Error Codes
  75
Chapter 5: Replaceable Parts

79
- Introduction
  79
- Replaceable Parts
  80
Appendix A: HP 9895A Disc Memory Command Set

83
- Introduction
  83
- Command Compatibility
  84
- Command Sequences
  84
- Parallel Poll Response
  85
- Cylinder and Track Numbering
  85
- Target Addressing
  86
- The D Bit
  86
- HP and IBM Formats
  87
- Loading of the Recording Heads
  87
- Holdoffs
  88
- Command Execution Checks
  90
- Commands
  91
- Command Table
  92
  - Sense Commands
    93
    
    Identify
    93
    
    Dsj
    93
    
    Read Self-Test Results
    95
    
    Read Loopback Record
    96
    
    Request Status
    97
    
    Request (Logical) Disc Address
    102
    
    Request (Physical) Disc Address
    103
  - Control Commands
    104
    
    Universal or Selected Device Clear
    104
    
    Clear
    104
    
    Initiate Self-Test
    106
    
    Write Loopback Record
    107
    
    Download
    108
    
    Seek
    109
    
    End
    111
    
    Door Lock
    112
    
    Door Unlock
    113
  - Disc Read Commands
    114
    
    Buffered Read
    114
    
    Unbuffered Read
    116
    
    Verify
    118
    
    Buffered Read Verify
    119
    
    Unbuffered Read Verify
    120
    
    Cold Load Read
    121
    
    ID Triggered Read
    123
  - Disc Write Commands
    124
    
    Buffered Write
    124
    
    Unbuffered Write
    126
    
    Initialize
    128
    
    Format
    130
Appendix B: Error Messages

133
Appendix C: Accessory Installation Gulde

135
- Rack Mount Installation Kit
  135
- Removing Front Panel
  136
- Front Panel Removed
  136
  - Controller Installation Kit
    137
  - Accessory Drive Installation Kit
    140
- Bottom View of Drive Location
  143
- Top View of Drive Location
  143
- LED Location
  147

HP 9895A Service Manual (113 pages)

Aexible Disc Memory

Brand: HP | Category: Storage | Size: 6.83 MB

Table of Contents
3
Specifications
10
Safety Considerations
13
Chapter 1: General Information

16
- Introduction
  16
- General Description
  16
- Service Support Package
  18
- PSP Contents
  18
- FSI Contents
  19
- Options
  20
- Equipment Supplied
  20
- Accessories Available
  21
- Installation
  22
  - Power Requirements
    22
  - Line Voltage Selector Switches
    22
  - Fuses
    23
  - Addressing
    23
  - Bus Address Selector Switch
    23
  - Setting the Drive Number
    24
  - Self-Test
    25
  - LED Display
    25
  - Self-Test Functions
    26
  - 9895A Installation Procedure
    27
  - 9895A Rear Panel
    28
  - Rom/Driver and HP-IB Interface Guide
    28
- Flexible Disc Use
  29
  - Introduction
    29
  - Disc Loading
    29
  - Disc Handling Precautions
    29
  - Write Protect
    30
  - Write Enable Method
    30
- Operator Controls
  31
- Reset Caused by Line Voltage Reduction
  31
Chapter 2: Theory of Operation

32
- Introduction
  32
- Controller Module Theory of Operation
  32
  - General Description
    32
  - Controller Interface to HP-IB(PHI Chip)
    34
  - Processor and Memory
    34
  - Read Operation
    35
  - Write Operation
    35
  - Error Detection
    35
  - Seek Operation
    36
  - Control, Status and Data Lines between the Controller and Drive Electronics
    37
Chapter 4 : Status Display Board Diagnosis

41
- Introduction
  41
- Track Format
  42
- Format Differences
  43
- Hewlett-Packard Standard Sector Recording Format
  45
IBM Standard Sector Recording Format

46
Chapter 5 : Replaceable Parts

48
- Introduction
  48
Appendix A: HP 9895A Disc Memory Command Set

48
- Command Compatibility
  49
- Command Sequences
  49
- Parallel Poll Response
  50
- Cylinder and Track Numbering
  50
- Target Addressing
  51
- The D Bit
  51
- HP and IBM Formats
  52
- Loading of the Recording Heads
  52
- Holdoffs
  53
- Command Execution Checks
  55
- Commands
  56
- Sense Commands
  58
- Identify
  58
- Dsj
  58
- Read Self-Test Results
  60
- Read Loopback Record
  61
- Request Status
  62
- Request (Logical) Disc Address
  67
- Request (Physical) Disc Address
  68
- Control Commands
  69
- Universal or Selected Device Clear
  69
- Clear
  70
- Initiate Self-Test
  71
- Write Loopback Record
  72
- Download
  73
- Seek
  74
- End
  76
- HP-IB CRC Secondary
  77
- Door Lock
  77
- Door Unlock
  78
- Disc Read Commands
  79
- Buffered Read
  79
- Unbuffered Read
  81
- Verify
  83
- Buffered Read Verify
  84
- Unbuffered Read Verify
  85
- Cold Load Read
  86
- ID Triggered Read
  88
- Disc Write Commands
  89
- Buffered Write
  89
- Unbuffered Write
  91
- Initialize
  93
- Format
  95
Appendix B: Error Messages

98
Appendix C: Accessory Installation Guide

101
- Removing Front Panel
  101
- Front Panel Removed
  101
- Controller Installation Kit
  102
- Accessory Drive Installation Kit
  105
- Bottom View of Drive Location
  108
- Top View of Drive Location
  108

HP Categories

HP 9895A Manuals

HP 9895A Service Manual (147 pages)

Table of Contents

Chapter 1: General Information

Chapter 2: Theory of Operation

Chapter 3: Maintenance

Chapter 4: Status Display Board Diagnosis

Chapter 5: Replaceable Parts

Appendix A: HP 9895A Disc Memory Command Set

Appendix B: Error Messages

Appendix C: Accessory Installation Gulde

HP 9895A Service Manual (113 pages)

Table of Contents

Chapter 1: General Information

Chapter 2: Theory of Operation

Chapter 4 : Status Display Board Diagnosis

IBM Standard Sector Recording Format

Chapter 5 : Replaceable Parts

Appendix A: HP 9895A Disc Memory Command Set

Appendix B: Error Messages

Appendix C: Accessory Installation Guide

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