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IBM 2025 Maintenance Manual

IBM 2025 Maintenance Manual (275 pages)

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Brand: IBM | Category: Computer Hardware | Size: 24.64 MB

Table of Contents

Preface
2
Table of Contents
3
Abbreviations
7
Safety
10
Chapter 1. Reference Data and Diagnostic Techniques

11
- Section 1. Reference Data
  11
- Core Storage (Figures 1-1 through 1-17)
  11
- Trap Addresses
  12
- Address Stop/Match
  12
- Auxiliary Storage Maps (Figures 1-7 through 1-17)
  16
- 2540 Reader/Punch (Figures 1-18 through 1-23)
  25
- 1400 Compatitiility Feature (Figures 1-27 through 1-33)
  30
- Auxiliary Storage Module 0 (1400 Compatibility)
  32
- Auxiliary Storage Module 1 (1400 Compatibility)
  34
- Auxiliary Storage Module 2 (1400 Compatibility)
  34
- Auxiliary Storage Module 3 (1400 Compatibility)
  35
- Auxiliary Storage Module 4 (1400 Compatibility)
  35
- Auxiliary Storage Module 5 (1400 Compatibility)
  35
- Auxiliary Storage Module
  35
- Systems--1400 Compatibility)
  35
- Local Storage (1400 Compatibility)
  35
- Zone 0 (1400 Compatibility)
  35
- Zone 6 (1400 Compatibility)
  36
- Zone 7 (1400 Compatibility)
  36
- PR-KB (Printer-Keyboard) Figures 1-34 through
  40
- (Figure 1-4 7)
  43
- Cpu.mode
  46
- 2311 Disk Mode
  53
- 1403 Mode
  53
- 2540 Reader Mode
  54
- (EXT to CPU)
  56
- (CPU to EXT)
  61
- (EXT to CPU)
  70
- (CPU to EXT)
  71
- Ext to Cpu
  76
- Local-Storage Location Decode
  77
- Program Codes and PSW (Figures 1-60 through 1-63)
  85
- Channel Command and Address Formats (Figures 1-64 through 1-68)
  87
- 1403 Printer (Figures 1-73 through 1-95)
  95
- 2311/DAC (Figures 1-96 through 1-118)
  114
- Section 2. Diagnostic Techniques
  122
- Maintenance Concepts
  122
- Malfunction Indications
  122
- Unit Identification
  123
- Malfunction Isolation
  123
- Repair
  123
- Repair Verification
  123
- Protection of Control Storage, CSL
  124
- Error Handling
  124
- Interface Control Check
  126
- 1052Logout
  126
- CPU Hardware Checks
  126
- CPU Microprogram Checks
  126
- CPU Attachment Checks
  127
- 2540 Attachment Checks
  127
- 2311 Attaclunent Checks
  127
- Channel Checks
  127
- System Checks
  128
- Low Temperature
  128
- External Branch Conditions
  128
- Integrated 1403 Attachment
  129
- System Control Panel
  130
- CPU Status Indicators
  132
- Alter/Display PR-KB
  132
- Csl
  132
- Allow Manual
  133
- Clock off
  133
- System Checks
  133
- Low Temperature
  133
- Power Check
  133
- PCH (Punch)
  133
- RDR (Reader)
  133
- CHNL (Channel)
  133
- File
  133
- CPU Checks
  133
- Operator's Control Panel (OCP) Indicators
  134
- Power on Key
  134
- Pluggable Indicators
  134
- Control Storage Load
  134
- PSW Restart
  134
- Control Address Set
  134
- Enable Control Storage Store
  134
- Printer-Keyboard Alter/Display
  134
- Diagnostic Control Switch
  134
- Stop
  134
- Single Address as
  135
- Load Program Storage
  135
- Load Storage
  135
- Engineering Changes (Ec's)
  136
- Field Microprogram Changes
  136
- Field Change Exceptions
  136
- Unique Considerations
  136
- Multisystem Configuration
  136
- 1401/1460 and 1440 Compatibility Features
  136
- Machine-Check Trap and 1052 Logout
  136
- Diagnose Instruction
  137
- CE Trap
  137
- CE Test Panel Hubs
  137
- Programming Errors
  137
- Local Storage Zone and External Mode
  137
- For 2560
  137
- Stop Position
  138
- Trap Position
  138
- Power and Cooling
  138
- Failure Detection, Indication, and Isolation
  138
- Cooling Facilities
  139
- Warm-Up
  139
- Convenience Outlets
  139
- Main Storage Diagnostic Aids
  139
- Andy Decode Numbering Scheme
  139
- Scoping Storage
  140
- Resistors
  140
- Resistors
  142
- Array Sense Line Checking
  142
Chapter 2. Console and Maintenance Features

150
- Section 1. Basic Unit
  150
- Storage Protect Key--Display
  150
- Patch Card Generation
  150
- Debe-2
  150
- 1401 Emulator CSL Deck
  151
- 1403 Buffer Load Microloop
  152
- Soft-Stop Loop--Single Cycling
  152
- Worst-Case Storage Scan Definition
  152
- MS Address Stop Procedure During IPL or CSL
  152
- Psw
  153
- PSW Restart
  153
- Procedure
  153
- Display of Current PSW
  153
- Description
  153
- Reader Checks During CSL
  154
- Checksum Routine--BCHK
  154
- Initializing Procedure--Checksum
  154
- System Configuration--CSL
  155
- BCPL Routine
  156
- Restrictions When Punching CSL Cards
  156
- Card
  156
- Metering Switch (CE Switch)
  157
- Display Operations
  157
- Program Storage Display
  157
- Auxiliary-Storage Display
  157
- Program-Storage Store
  158
- Auxiliary-Storage Store
  158
- SECTION La. PR-KB PROCEDURES
  159
- Addressing, Console Printer-Keyboard
  159
- Program-Controlled Operations
  159
- Channel Commands
  159
- Setup
  159
- Addressing
  159
- Execution of Alter or Display
  160
- End Operation
  160
- Message Formats
  160
- Alter Storage
  160
- Display Storage
  161
- Logout
  161
- Suggested Restart Procedures for Integrated PR-KB
  162
- Sense Bits 4, 5, 6, and
  163
- TI (1052 Data In)
  163
- TR (1052 Tilt/Rotate Register)
  163
- TD (1052 Diagnostic Branch Conditions)
  163
- TT (1052 Branch Conditions)
  163
- TU (1052 Diagnostic Branch Conditions)
  163
- CPU to External Facilities (1052)
  164
- TE (1052 Data Out)
  164
- SECTION Lb. 1403 PROCEDURES
  165
- Checks (1403)
  165
- PLB Parity Check
  165
- Hammer Check
  166
- Hammer Driver Coil--Fuses
  166
- Sync Check
  166
- Additional Checks
  167
- Forms Check
  167
- End of Forms
  167
- Suggested Restart Procedures for 1403
  167
- Command Reject (Sense Bit 0)
  167
- Intervention Required (Sense Bit 1)
  167
- Bus-Out Check (Sense Bit 2)
  168
- Data Check (Sense Bit 4)--MCS Only
  168
- Sense Bit
  169
- Resets (Integrated 1403)
  169
- 2:36 External to CPU Facilities (1403)
  169
- PRI (Print Line Buffer Data-In)
  169
- PRS (1403 Sense/Status Conditions)
  169
- PRD (Diagnostic Conditions)
  170
- Diagnostic Decode
  170
- CPU to External Facilities (1403)
  170
- PRC (Carriage Control Register Data-Out)
  170
- MCS Table--Utility Program
  171
- SECTION Lc. 2311/DAC Procedures
  172
- Addressing--2311 Disk Storage Drive
  172
- Sense Conditions, DAC
  173
- Track Orientation
  173
- Error Recovery Procedures, 2311 DAC
  175
- Error Conditions Table, 2311 DAC
  175
- SECTION Ld. 2540 PROCEDURES
  178
- Addressing, Integrated 2540 Attachment
  178
- 2540 Restarts from Error Conditions
  178
- Jam Removal
  182
- External to CPU Facilities
  182
- Rpl (Reader-Punch Data In)
  182
- RS (Reader Branch Conditions)
  182
- PS (Punch Branch Conditions)
  183
- RPS (Reader and Punch Branch Conditions)
  183
- Rpdl
  183
- RPD2 (Diagnostic Reader/Punch Branch Conditions)
  183
- RP= K (CS Decode= D)
  185
- D K (Cs Decode 9)
  185
- SECTION Le. CHANNEL PROCEDURES
  186
- Multiplexer Channel Device Addressing
  186
- Channel and Unit Addressing Restrictions
  186
- Channel
  189
- The MPX Channel and ICA Features)
  189
- Assigning Integrated 1052, 1403, 2311, and 2540 Device Addresses
  189
- Channel Status (Byte 0)
  190
- Op-Flag (Byte 1)
  190
- Data Address (Bytes 2 and 3)
  190
- Count (Bytes 4 and 5)
  191
- Next CCW Address (Byte 6 and 7)
  191
- Channel Status (LS Zone 7 Register GO)
  191
- Data Addrt!Ss (LS Zone 7 Register V)
  191
- Count (LS Zone 7 Register U)
  191
- Next CCW Address (Auxiliary Storage Location 008A)
  191
- Channel Error-Handling Philosophy and Logout
  191
- Channel Status Byte
  192
- Logout
  192
- Channel Control Check Logout
  192
- Interface Control Check Logout
  193
- Standard Interface Hardware
  195
- GS (Channel Branch Conditions)
  195
- GT (Channel Branch Conditions)
  195
- GD (Channel Diagnostic Register)
  195
- IN (Channel Bus-In)
  196
- CPU to External Facilities (Channel)
  196
- OUT (Channel Bus-Out)
  196
- SECTION Lf. ICA PROCEDURES
  197
- Nonoperational Lines
  197
- Station Selection Feature
  197
- Jumper Options
  197
- Section 2. Features
  198
- Multiple Character Set
  198
- 2560 Procedures
  198
Chapter 3. Preventive Maintenance

200
- Section 1. Basic Unit
  200
- Section 2. Features
  201
Chapter 4. Checks, Adjustments, and Removals

202
- Section 1. Basic Unit
  202
- CPU Timing
  202
- Specifications
  202
- Core Storage Array Temperature Control
  202
- Cooling
  202
- Specification
  202
- Heating
  202
- Heater Adjustment
  202
- Schmoo Curve (Main Storage)
  204
- Example of Schmoo Curve Procedure
  204
- When to Schmoo
  205
- Service Checks
  205
- Worst-Case Patterns
  205
- Worst-Case Test
  205
- Four-Point Strobe Schmoo Procedure
  205
- Checkout Procedures
  206
- Scoping Main Storage
  206
- Two-Point Schmoo Procedure
  206
- Main Storage Replacement
  206
- Removing the 0-32K Unit
  206
- Removing the 32-64K Unit
  207
- Array Changing
  207
- Changing Diodes
  207
- Local Storage
  207
- Scoping Local Storage
  207
- Initial Delay Line Settings
  207
- Delay Lines (Local Storage) Adjustment
  207
- Local Storage/Storage Protect Cards
  208
- SCR Circuits
  208
- Replacement
  209
- System Reset, IPL, or CSL--Singleshot
  209
- Adjustment
  209
- Operational Out--Singleshot
  209
- Checkout Procedure
  209
- 2540 Attachment
  209

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