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5251 Series
Maintenance information manual
IBM 5251 Series Maintenance Information Manual
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Contents
Table of Contents
Bookmarks
Table of Contents
Table of Contents
Glossary of Terms and Abbreviations
Using the Ibm 5251 Display Station Models
Maintenance Procedures Section
Location Drawings
Maintenance Procedures
Mini-Maps
Diagnostic Aids
Preventive Maintenance Section
Tools and Test Equipment Section
Theory Section
Features Section
Appendixes
Index
Maintenance Procedures
Locations
Front View
Covers Open
Cable Chart
Main Planar Board and Card Locations
Logic Part Numbers
Main Planar Board Jumpers
Covers
Display Station Covers
Keyboard Covers
Control Panel and Keylock
Control Panel Cable Mini-MAP
Conditions after Power on
Service Aids
Keylock Mini-MAP
Magnetic Stripe Reader
Magnetic Stripe Reader Voltage and Control Mini-MAP
Conditions after Power on
Service Aids
Tools
Conditions after Power on
Service Aids
Tools
Mini-MAP
Conditions after Power on
Service Aids
Tools
Magnetic Stripe Reader Card Jumpering
Magnetic Stripe Reader Installation and Removal
Installation
Removal
Light Pen Voltage and Control Mini-MAP
Conditions after Power on
Service Aids
Tools
Service Aids
Tools
Light Pen Register and Control Mini-MAP
Conditions after Power on
Service Aids
Tools
Light Pen Tip Switch Mini-MAP
Service Aids
Tools
Light Pen Card Jumpering
Light Pen Installation and Removal
Installation
Removal
Keyboard
Keyboard Locations
Keyboard Remova I and Disassembly
Removal
Disassembly
Assembly
Cleaning
Key Module
Removal
Installation
Spacebar
Removal
Installation
Flyplate Replacement
Keyboard ID Mini-MAP
Conditions after Power on
Service Aids
Tools
Keyboard Scan Code Mini-MAP
Conditions after Power on
Service Aids
Tools
Keyboard Voltage and Strobe Mini-MAP
Conditions after Power on
Service Aids
Tools
Keyboard Clicker Mini-MAP
Conditions after Power on
Service Aids
Tools
Keyboard Cable Check Mini-MAP
Conditions after Power on
Service Aids
Tools
Keyboard Par Mini-MAP
Conditions after Power on
Service Aids
Tools
Keyboard Arrangement
Keyboard Template (GX21-9266)
Standard Keyboard Layout
Standard Keyboard Layout (Katakana)
Data-Entry Keyboard Layout (66 Keys)
Data-Entry Keyboard Layout (67 Keys)
Katakana Data-Entry Keyboard Layout
Scan Code Table
Display Assembly Locations
Top View
Display Assembly Removal and Replacement
Removal
Display Adjustments
Video Adjustments
Brightness Limiter Potentiometer Adjustment
Contrast Control and Brightness
Video Gain/Video Drive Potentiometer Adjustment
Vertical and Horizontal Adjustments
Vertical Adjustments
Horizontal Adjustments
Yoke Adjustment
Centering Adjustment
Factory Adjustments
Focus Potentiometer Adjustment
B+ Potentiometer Adjustment
Raster Check
Display Assembly Cable Mini-MAP
Conditions after Power on
Service Aids
Tools
Display Screen Examples
System Cable
Customer System Cable Signal Quality Check
Internal System Cable and Terminator Switch
Typical Display Station Configuration
Station Protector and Lightning Protector
Station Protector
Typical Installation
Typical Station Protector Board
Lightning Protector
Cable Assembly Procedures
Assembly of Twinaxial Cable
Assembly of Coaxial Cable
Twinaxial-Coaxial Adapter
Adapter Service Check
Cable Labeling
Tests of Cabling after Installation
Power Supply
Power Supply Locations
Power Supply Removal and Replacement
Removal
Voltage Level Checks
Power Supply Ripple Level Check
Power Supply Charts
US Power Supply
World Trade Power Supply
Line Cordi Line Filter Removal and Replacement
Power Supply Fan Removal and Relplacement
Removal
Replacement
Light Pen Power Supply Card
Removal and Replacement
Diagnostic Aids
Control Panel Leds
Line Sync
Line Check
Internal Check
Storage Check
Ready
Status Switch
Field Attribute Characters
Display Station Operation Overview
Power-On Diagnostic
Power-On Diagnostic Flowchart (Part 1 of 3)
Power-On Diagnostic Flowchart (Part 2 of 3)
Power-On Diagnostic Flowchart (Part 3 of 3)
Free Key Operation
Free Key Mode Flowchart
Online Tests Overview
Online Tests Displays
Sign-On Procedure
Error History Table
Error Codes
Display Station Error Codes
Operator Error Codes
Cursor Display Positions
Power-On Diagnostic Display
Preventive Maintenance
Tools and Test Equipment
CE General Logic Probe(Part 453212)
Theory
Introduction
System Configuration
Data Flow
Functional Units
I/O Adapter Control
Keyboard
Clicker
Keyboard Identification
Display Adapter
Buffering and Displaying
Control Panel
Display Screen
Field Attributes
Display Screen Indicators
Cable Adapter
The 16-Bit Frame
Transmission Sequences
Commands
Response Frame
Interface
Data Transfer
Microprocessing Unit (MPU)
Read/Write Storage
Internal Processing Queue
Control Registers
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Using the Ibm 5251 Display Station Models
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IBM 5251 Display Station
Models 1 and 11
,
Maintenance I nformation Manual
Table of
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This manual is also suitable for:
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5251-11
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