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5255 Model 2
Maintenance information manual
IBM 5255 Model 2 Maintenance Information Manual
Display station
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Safety
General Considerations
Table of Contents
System Network
Raster
Transmission Sequences
Glossary of Terms and Abbreviations
Legend
Using the Ibm 5255 Display Station Maintenance Information Manual
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. 1·1
Locations
Front View
Covers Open
Cable Chart
1 I Keylock
Line Cord
Planar Boards and Card Locations
Logic Part Numbers
Planar
Planar Board Jumpers
Covers
Display Station Covers 1
Keyboard Covers
Control Panel, Rear Panel, and Keylock
Control Panel
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
Tools
Service Aids
Tools
Conditions after Power-On
Service Aids
Tools
Magnetic Stripe Reader Card Jumpering
Magnetic Stripe Reader Installation and Removal
Installation
Extended Display Character RAM Mini-MAP
Conditions after Power-On
Extended Display Character Expansion Feature
Conditions after Power-On
Keyboard
Keyboard Locations
Alphanumeric Keyboard
Ideographic Keyboard
Ideographic Keyboard Printer Circuitry
Removal
Replacement
Cleaning
Key Module
Removal
Installation, Alphanumeric Keyboard
Installation, Ideographic Keyboard
Spacebar
Removal
Installation
Key Lens Removal-Replacement
Key Lens
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 Voltage and Strobe
Keyboard Clicker Mini-MAP
Conditions after Power-On
Service Aids
Tools
Keyboard Clicker
Keyboard Cable Check Mini-MAP
Conditions after Power-On
Service Aids
Tools
Keyboard Cable Check
Keyboard por Mini-MAP
Conditions after Power-On
Service Aids
Tools
Keyboard por
Keyboard Identification
Keyboard Arrangement
Keyboard Template
Alphanumeric Keyboard Layout
Ideographic Keyboard Layout
144 Scan Code Tables
Alphanumeric Keyboard
Ideographic Keyboard
Display Assembly
Display Assembly Locations
Display Assembly Removal and Replacement
Removal
Display Adjustments
Video Adjustments
Brightness Limiter Potentiometer Adjustment
Contrast Control and Brightness Control Adjustments
Video Gain/Video Drive Potentiometer Adjustment
Vertical and Horizontal Adjustments
Vertical Adjustments
Horizontal Adjustments
Yoke Adjustment
Centering Adjustment
Factory Adjustments
Focus Potentionmeter Adjustment
B+ Potentiometer Adjustment
Raster Check
Display Assembly Cable Mini-MAP
Conditions after Power-On
Service Aids
Tools
Display Assembly Cable
Display Screen Examples
System Cable
Customer System Cable Signal Quality Check
Internal System Cable and Terminator Switch
Station Protector
Lightning Protector
Cable Assembly Procedures
Twinaxial Cable
Coaxial Cable
Twinaxial-Coaxial Adapter
Adapter Service Check
Cable Labeling
Tests of Cabling
System Network Mini-MAP
Conditions after Power-On
Service Aids
Power Supply
Power Supply Locations
Voltage Level Checks
AC Voltage Levels
DC Voltage Levels
Power Supply Ripple Level Check
Power Supply Schematics
120-Volt Power Supply
Ripple Level
World Trade Power Supply (50 Hz)
World Trade Power Supply (60 Hz)
Power Supply Fan Removal and Replacement
Removal
Power Supply Fan Removal
Conditions after Power-On
Service Aids
DC Distribution Check
Power Isolation
Diagnostic Aids
Control Panel and Planar Leds
Line Sync
Line Check
Internal Check
Storage Check
Ready
Planar Storage Check
Status Switch
Field Attribute Characters
Display Station Operation Overview
Power-On Diagnostic
Power-On Diagnostic Flowchart (Part 1 of 3)
Power-On Diagnostic Flowchart
Power-On Diagnostic Flowchart (Part 3 of 3)
Free Key Operation
Free Key Mode Flowchart
Scan.codes
Online Tests
Online Tests Overview
Online Tests Displays
Sign-On Procedure
Error History Table
Error Codes
Display Station Error Codes
Operator Error Codes
Diagnostic Display Locations
Cursor Display Positions and Test Mode Data Fields
Troubleshooting Aids
Conditions after Power
Service Aids . ·1·128
Tools
Mini-Maps
Preventive Maintenance
Tools and Test Equipment
CE General Logic Probe (Part 453212)
Theory
Introduction
System Configuration
Data Flow
Functional Units
1/0 Adapter Control
Keyboard
Clicker
Keyboard Identification
Key Module
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
Keyboard Scan Code
Data Transfer
Microprocessing Unit (MPU)
Read/Write Storage
Internal Processing Queue
Control Registers
Features
Keylock Feature
Cable Thru Feature
Magnetic Stripe Reader Feature
Read Data Word
Extended Display Character Expansion Feature
Appendix A. Display Station Setup
Setup Instructions-Section 1
Setup Instructions
Appendix B. Keyboard Function
Command Key
Delete/Insert Key
Print Key
Helpkey
Roll Keys
Horizontal Movement Keys
Error Reset Key
Enter/Record Advance Key
Field Exit Key
Field+ Key
Dupkey
Character Backspace Key
Upper Shift Key
Shift Lock Key
Spacebar
Ideographic Keyboard
Erase to End of Field Key
Alternate Shift Key
Alphanumeric Mode
Alternate Entry or Ideographic Mode
Appendix C. Self-Check Feature
I N D E X
Control Panel Cable
Extended Display Character
Keylock
Line Filter
A/N Keyboard
Alphanumeric
Reader~Commentform
Reader's Comment Form
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I BM 5255 Display Station
Model 2
Maintenance Information Manual
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