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Manuals
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IBM Manuals
Keyboard
3277
Troubleshooting manual
IBM 3277 Troubleshooting Manual
Display station models 1 and 2
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
Maintenance Approach
Introduction
Online/Offline Maintenance
Field Replaceable Units (FRU)
Troubleshooting Aids
Trouble Analysis
Obvious Symptoms
Isolation to a Display Station
Offline Symptoms
Formatted Buffer Symptoms
Customer-Reported Failures
Tools and Diagnostic Programs
Maintenance Tools
Customer Engineer Tool Kit
Logic Probes
Description
Probe Usage
Probe Checkout
Probe Repair
Alignment Mask
Lor FE Test Card
Diagnostic Programs
Test Patterns
Requesting RFT Patterns
Local Display Stations
Remote Display Stations
Online Tests (Ol Ts)
Symptom Index
Symptom Index Usage
Developing Symptoms
Trouble!'Hooting Diagrams
Checks, Adjustments, and Removals
Checks
Display Station Test Using Test
Pattern
Display Station Operational Test
Voltage Checks
Low-Voltage DC Checks
High-Voltage Check
Arc-Suppression Check
AC Check
High-Voltage Power Supply Check 5·5
Keyboard Checks
Voltages
Key Module and Encoding - Type a
Output Codes
Shift Key Modules - Type a Keyboards Only
Spacebar Assembly Mechanical Checks
Adjustments
Display Image Adjustments
Brightness 5·7
Contrast 5·7
Focus 5·7
Yoke
Magnetic Centering Rings
Modell Analog Card Adjustments
Model 2 Analog Card Adjustments
Regulator Card
OFF-PUSH Switch (Model 2 Only)
Removals
Covers
Power Components
Low-Voltage Power Supply A~Mbly
Regulator Card
AC Capacitor
Model 1 Prime Power Box
Model 2 Prime Power Box
Modell Ferro Transformer (50-Hz)
Model 2 Ferro Transformer (50-Hz)
Fuses
Anaiog Components
Crt
Yoke and Shields
Modell Analog Card
Model 2 Analog Card
Modell Brightness and Contrast Controls
Model 2 Brightness and Contrast Controls
Power Control Switch
Logic Components
Logic Card
Logic Board
Keyboard Components
Keyboard from Display Station
Keyboard Top Cover
Keyboard A~Mbly from Bottom Pan
Audible Feedback Assembly
Keybutton
Type a Switch Module
Type a Spacebar Assemblies
Keybutton Support Modules - Type a Keyboards Only
Type B Module
Type B Spacebar
Circuit Board and Electronics Assembly - Type B Keyboards Only 5·20
Audible Alarm (Optional Feature)
Security Keylock (Optional Feature)
Selector Light-Pen (Optional Feature)
Operator Identification Card Reader (Optional Feature)
Type B Keyboard Maintenance Aids
Key Modules
Contamination Shields
Protective Membrane/Shield
Ground Check
Ground Loop Isolation
Crooked or Loose Key Tops
Reference Data
Controls
External Controls
External I Nd Icalo
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Maintenance Library
Display Station Models 1 and 2
Troubleshooting Guide
SY27-2314-5
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