User Manuals: IBM 3277 Display Station Keyboard

Manuals and User Guides for IBM 3277 Display Station Keyboard. We have 1 IBM 3277 Display Station Keyboard manual available for free PDF download: Troubleshooting Manual

IBM 3277 Troubleshooting Manual

IBM 3277 Troubleshooting Manual (124 pages)

Display Station Models 1 and 2

Brand: IBM | Category: Keyboard | Size: 6.17 MB

Table of Contents

Table of Contents
3
Maintenance Approach
7
Introduction
7
Online/Offline Maintenance
7
Field Replaceable Units (FRU)
7
Troubleshooting Aids
7
Trouble Analysis
7
Obvious Symptoms
7
Isolation to a Display Station
7
Offline Symptoms
8
Formatted Buffer Symptoms
8
Customer-Reported Failures
8
Tools and Diagnostic Programs
9
Maintenance Tools
9
Customer Engineer Tool Kit
9
Logic Probes
9
Description
9
Probe Usage
9
Probe Checkout
9
Probe Repair
11
Alignment Mask
11
Lor FE Test Card
11
Diagnostic Programs
11
Test Patterns
11
Requesting RFT Patterns
12
Local Display Stations
16
Remote Display Stations
16
Online Tests (Ol Ts)
17
Symptom Index
18
Symptom Index Usage
18
Developing Symptoms
18
Trouble!'Hooting Diagrams
30
Checks, Adjustments, and Removals
59
Checks
59
Display Station Test Using Test
59
Pattern
60
Display Station Operational Test
60
Voltage Checks
61
Low-Voltage DC Checks
61
High-Voltage Check
62
Arc-Suppression Check
62
AC Check
62
High-Voltage Power Supply Check 5·5
63
Keyboard Checks
63
Voltages
63
Key Module and Encoding - Type a
63
Output Codes
64
Shift Key Modules - Type a Keyboards Only
64
Spacebar Assembly Mechanical Checks
64
Adjustments
64
Display Image Adjustments
64
Brightness 5·7
65
Contrast 5·7
65
Focus 5·7
65
Yoke
65
Magnetic Centering Rings
65
Modell Analog Card Adjustments
65
Model 2 Analog Card Adjustments
66
Regulator Card
66
- OFF-PUSH Switch (Model 2 Only)
  66
- Removals
  67
Covers
67
- Power Components
  68
Low-Voltage Power Supply A~Mbly
68
Regulator Card
68
AC Capacitor
68
Model 1 Prime Power Box
68
Model 2 Prime Power Box
68
Modell Ferro Transformer (50-Hz)
68
Model 2 Ferro Transformer (50-Hz)
69
Fuses
69
Anaiog Components
69
Crt
69
Yoke and Shields
71
Modell Analog Card
71
Model 2 Analog Card
71
Modell Brightness and Contrast Controls
71
Model 2 Brightness and Contrast Controls
71
Power Control Switch
72
Logic Components
72
Logic Card
72
Logic Board
72
Keyboard Components
72
Keyboard from Display Station
72
- Keyboard Top Cover
  72
Keyboard A~Mbly from Bottom Pan
72
Audible Feedback Assembly
72
Keybutton
73
Type a Switch Module
73
Type a Spacebar Assemblies
75
Keybutton Support Modules - Type a Keyboards Only
75
- Type B Module
  76
Type B Spacebar
78
- Circuit Board and Electronics Assembly - Type B Keyboards Only 5·20
  78
Audible Alarm (Optional Feature)
78
Protective Membrane/Shield
80
- Ground Check
  80
Ground Loop Isolation
80
- Crooked or Loose Key Tops
  80
- Reference Data
  81
- Controls
  81
External Controls
81
External I Nd Icalo
82

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