IBM 3274 51C Manuals

IBM 3274 51C Manuals

Manuals and User Guides for IBM 3274 51C. We have 1 IBM 3274 51C manual available for free PDF download: Maintenance Information

IBM 3274 51C Maintenance Information

IBM 3274 51C Maintenance Information (358 pages)

Brand: IBM | Category: Control Unit | Size: 14.29 MB

Table of Contents

Table of Contents

2
- Chapter Introduction 1.1 General
  6
- Maintenance Approach
  6
- Field Replaceable Unit (FRU) Locations
  7
  - 0IA-Al Logic Board
    7
  - Card Numbers
    7
  - IML Options
    7
  - Machine Model Number
    7
  - Operator Panel
    7
  - Indicators
    8
- Chapter 2. Subsystem Problem Isolation Procedure
  
  14
  - Step 1 Using the Isolation Procedure
    14
  - Step 2 Power Test
    14
  - Step 3 Bus Test
    14
  - Step 4 Internal Tests
    15
  - Operational Indicators
    15
  - Control Storage Card Layouts
    19
  - Step 5 Device Adapters - Driver/Receiver
    20
  - Step 6 Display Symbols (Category a Only)
    24
  - Step 8 Host Attachment
    27
  - Step 9 Voltage Checks
    27
  - Step 10 Verification Test
    27
  - Step 11 Last Option
    27
    
    Symptom Repair List
    27
- Chapter 3 . Maintenance Analysis Procedures (Maps)3-1
  
  28
  - General
    28
    
    MAP A20, Control Logic Failure
    28
    
    Map A40 Diskette Failure
    38
    
    MAP A50, Type a Adapter Failure Code
    45
    
    Map A100 Machine Checkout
    49
    
    Turning
    63
- Chapter 4. Removal and Replacement Procedures
  
  81
  - Machine Access - Cover Removal/Ce Manuals
    82
  - Machine Access, Cover
    82
  - Machine Access - Board/Tsr Supply
    83
  - Card Removal and Replacement
    84
  - Internal Cable/Connector, Removal and Replacement
    84
  - Prime Power Box
    85
  - Prime Power Box, Removal and Replacement
    85
  - Prime Power Transformer
    86
    
    Fan Assembly, Removal and Replacement
    87
  - Prime Power Transformer, Removal and Replacement
    86
  - Fan Assembly
    87
    
    Diode Assembly, Removal and Replacement
    88
    
    Input Filter Capacitor, Removal and Replacement
    89
    
    TSR Power Supply, Removal and Replacement
    90
  - TSR Power Supply
    90
    
    I/O Panel - Driver/Receiver, Removal and Replacement
    91
    
    I/O Panel, Driver/Receiver Card
    91
    
    Diskette Drive, Removal and Replacement
    92
    
    Line Plate Card, Removal and Replacement
    93
    
    Operator Panel/Indicator Card
    94
    
    Operator Panel/Indicator Card, Removal and Replacement
    94
    
    Operator Panel Switches, Removal and Replacement
    96
    
    Operator Panel Switches
    97
    
    3274 Model SIC BSC
    98
    
    3274 Models SIC and 52C Modes/Speeds
    98
    
    Chapter S. Communications Reference Data
    98
    
    Communications Facilities
    98
    
    Eia
    98
    
    Integrated Modem (1200 Bps)
    101
    
    Integrated Modem (1200 Bps) Wrap
    101
    
    Integrated Modems (2400, 4800, and 9600 Bps)
    101
    
    Loop
    101
    
    Switched
    101
    
    Communications Line Flow, EIA
    102
    
    Communications Line Flow, DDS Adapter
    105
    
    Communications Line Flow, Loop
    106
    
    CBS Data Coupler - U.S. and Canada
    109
  - Wrap Test
    110
    
    Wrap Test Without Attached Modem
    110
    
    9600-Bps Integrated Modem
    111
    
    Line Attachments
    111
    
    Loop Indicators
    111
    
    Loop Wrap Test
    111
    
    Multipoint Network Operating Speed
    111
    
    Point-To-Point Network Operating Speed
    111
    
    Communications Line Flow, 2400-Bps, 4800-Bps, and 9600-Bps Nonswitched Integrated Modems (Model SIC) for U.S., Canada, and World Trade Countries
    112
    
    2400-,4800-, 9600-Bps Integrated Modem Diagnostics
    115
    
    ALT2 Self-Test
    115
    
    Integrated Modem Failure
    115
    
    Operate Indicator
    115
    
    Self-Test/Wrap Test
    115
    
    Signal Quality
    115
    
    Speed Control Backup
    115
    
    Test Results
    116
    
    ALT2/IML Modem Wrap Test
    119
    
    And Canada
    119
    
    Countries
    119
    
    Other Countries
    119
    
    Procedure to Follow if IML Test 0111 Is Flashing
    119
    
    Test Alarm Card (TAC) Extended Diagnostic
    119
  - Transmit Level Switch Settings
    120
    
    2400-,4800-, and 9600-Bps Integrated Modem
    122
    
    Board Wiring Options
    122
    
    Card Wiring Options
    122
    
    Carrier Detect Sensitivity (Normally Not Adjusted)
    122
    
    Clear-To-Send Delay (Normally Not Adjusted)
    122
    
    Continuous/Noncontinuous Carrier (Normally Not Adjusted)
    122
    
    Multipoint)
    122
    
    Transmission Pre-Emphasis for 2400-Bps
    122
  - 3274 System Grounding
    122
  - Board Wiring for the Various Teleprocessing Attachment Configurations
    122
  - Top Card Connector Pin Locations
    124
  - Pluggable ROS Removal Tool
    126
  - 3290 Address Configuration
    128
    
    Configuration Support D
    129
    
    Configuration Support T
    129
  - Battery Power Supply Check
    130
- Chapter 6. 3274 Encrypt/Decrypt Feature
  
  130
  - Featuredescription
    130
    
    Encrypt/Decrypt Failures
    130
    
    Feature Components
    130
    
    IML Display Indications
    130
  - Procedure for Encrypt/Decrypt Battery Replacement
    131
  - Entering the Terminal Master Key
    132
- Appendix E. 31SD Diskette Drive Maintenance E-L
  
  133
  - Verifying the Terminal Master Key
    133
  - Encrypt/Decrypt Feature Test
    134
- Appendix F. 5 Ltd Diskette Drive Maintenance F-1
  
  136
  - Chapter 7. Response Time Monitor
    
    136
    
    Feature Description
    136
    
    IML Testing
    136
    
    Microcode Support
    136
- Appendix A. Locations
  
  139
  - Card Connector
    139
    
    Card
    139
    
    Locations
    145
  - Card Location Chart
    151
  - Transformer Input and Fan Voltage Wiring
    155
    
    N-Sw and N-Sw-SNBU, U.S. and Canada
    164
    
    N-Sw, WT Except Canada
    164
    
    SW-AA/MA,'U.S. and Canada
    164
    
    N-Sw-SNBU-AA, WT Except Canada
    168
    
    Sw-AA, WT Except Canada
    169
  - Operator Panel
    186
Table of Contents

191
- Chapter 1 Introduction
  
  192
  - General Description
    192
  - Diskette Description
    193
  - Diskette Insertion and Removal
    194
  - Maintenance
    195
  - Electrical Characteristics
    196
  - Machine Characteristics
    196
  - Physical Characteristics
    196
  - Environmental Characteristics
    197
  - Machine Safety
    197
  - Personal Safety
    197
  - Safety
    197
  - Diskette Drive Parts
    199
  - Control Card Interface
    202
  - Device Theory of Operation
    202
  - Mechanicaloperation
    204
  - Typical Device Operation
    204
  - Read Data
    208
  - Collet/Flat Spring Assembly
    211
  - Collet/Flat Spring Removal
    211
  - Maintenance
    211
  - Collet/Flat Spring Replacement
    212
  - Head/Carriage Assembly
    213
  - Head/Carriage Pressure Pad Removal and
    213
  - Replacement
    213
  - Head/Carriage Adjustment
    217
  - Head/Carriage Removal
    219
  - Head/Carriage Replacement
    219
  - Head Load Solenoid and Bail
    223
  - Solenoid and Bail Service Check
    223
    
    Head Gap Service Check
    225
  - Head Gap Adjustment
    225
    
    Bail Adjustment
    225
  - Bail Removal
    227
  - Bail Replacement
    227
  - Solenoid and Idler Removal
    227
  - Solenoid and Idler Replacement
    227
    
    AC Drive Parts
    230
  - Drive Motor Removal
    230
  - Drive Motor Replacement
    230
    
    Capacitor Removal
    230
    
    Capacitor Replacement
    230
    
    Drive Fan and Pulley Assembly Removal
    232
  - Drive Fan and Pulley Assembly Replacement
    232
  - Stepper Drive Parts
    232
    
    Stepper Motor Removal
    232
  - Stepper Motor Replacement
    232
  - Drive Band Removal
    234
  - Drive Band Service Check
    234
    
    Drive Band Adjustment
    234
  - Stepper Pulley and Clamp Removal
    234
    
    Stepper Pulley and Clamp Replacement
    234
  - Drive Band Replacement
    235
    
    Diskette Speed Service Check
    237
    
    LED Output Service Check
    239
    
    LED Removal
    239
  - LED Replacement
    240
    
    PTX Amplifier Service Check
    240
    
    Control Card Removal
    242
    
    Diskette Drive Control Card
    242
    
    PTX Removal
    242
    
    PTX Replacement
    242
  - Control Card Replacement
    242
    
    Control Card Test Pins and Connector Pins
    242
    
    Diskette Drive
    303

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