IBM System/360 2050 Manuals

Manuals and User Guides for IBM System/360 2050. We have 1 IBM System/360 2050 manual available for free PDF download: Maintenance Manual

IBM System/360 2050 Maintenance Manual

IBM System/360 2050 Maintenance Manual (198 pages)

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Brand: IBM | Category: Computer Hardware | Size: 18.52 MB

Table of Contents

Table of Contents
4
Diagnostic Techniques
12
Maintenance Philosophy
12
- Failure Detection
  12
- Deferred Maintenance
  12
Troubleshooting F1Owcharts
12
- Power Faults
  13
- Loading Faults
  13
- Programming Faults and Error Stops
  13
Other Maintenance Documentation
13
- Error Check Analysis Diagrams
  13
Service Aids
13
- ALD Page Key
  13
- CAS Logic Diagram Page Key
  14
- Optional Feature Version Codes
  14
- Di3Gnostic Mode Codes
  14
Selector Channel Error Handling
16
- Interface Control Check
  16
- Channel Control Check--Channel Detected
  16
- Channel Control Checl<--CPU Detected
  16
- Program, Storage-Protect, and Chaining Check
  16
- Data Check
  17
- SIM Check
  17
- Incorrect Length Indication
  18
- Error Priority
  18
Maintenance Features
19
CPU Control Modes
19
- Sequence Counter Mode
  19
- Main Store Mode
  21
- ROS Mode
  21
Functional Units
22
- Sequence Counter
  22
- Sequence St:rts
  22
- FLT Op Reg
  22
- Scan/Log Decoder
  22
- ROS Kernels
  22
- Log Trigger
  33
- Supervisory Stat
  33
- Progressive Scan Stat
  33
- Supervisory Enable Storage Stat
  33
- Binary Trigger
  33
- Scan Test Counter
  33
- Pass/Fail Triggers
  33
Supervisory Controls
36
Linkage Control Word
41
Diagnose Instruction
41
FAULT LOCATING TESTS (Flt's)
42
Fl. T Load
43
- Load from Tape
  43
- Load from Disk
  46
- Unsuccessful Load
  46
- Completion of Successful Load
  46
Main Store Mode Fl. T's
46
ROS Mode FL T's
49
FLT Operating/Repair Procedures
54
FLT Documentation
62
Progressive Scan
64
- Test Descriptions
  64
- Test Patterns
  72
- Selector Channel Tape or Disk
  72
- Selector Channel Clock Control
  72
- Selector Channel Operating Procedure Example
  73
- Selector Channel Test Documentation
  73
- Selector Scan Monitor
  75
- Multiplexor Channel Tape or Disk
  75
- Multipl
  75
- Multiplexor Channel Test Documentation
  75
Diagnostic Programs
75
- MIDAS Sense Switches
  75
- MIDAS Display Codes
  75
MARGINAL Checklng
76
- Nominal Voltages
  77
- Marginal Voltage Limits
  77
- Marginal Checking Procedure
  77
Error Checking
77
- Ldentific a Ti on
  77
- Failure Detection Facilities
  77
Preventive Maintenance
80
- Lamp Test
  80
- Diagnostics
  80
Cpu and Channel Service Checks
81
- Waveform Measurements
  81
- 2050 Clock
  81
Main Storage (Ms) Service Checks
81
- Storage Test
  81
- Main Storage Test Points
  81
- Main Storage Addressing
  82
- Main Storage Temperature and Humidity
  82
- Main Storage Power Information
  82
- Exercise Bump Storage
  83
- Continually Address One MS Location
  83
- Scan MS for Bad Parity
  83
- Bit Arrangement of MS Word
  83
- Check Strobe of Main Storage
  83
- Checking MS Drivers and Terminating Diodes
  84

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