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Itel Manuals
Typewriter
UD002441-1
Operation, service and parts manual
Itel UD002441-1 Operation, Service And Parts Manual
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
Chapter 1, General Information
General Information
Introduction
Manual Content
Chapter 2, Installation
Chapter 3, Operation
Chapter 4, Theory of Operation
Chapter 5, Maintenance
Chapter 6, Checks and Adjustments
Chapter 7, Error Analysis
Chapter 8, Replacement Procedures
Chapter 9, Diagrams
System Description
Simplified System Block Diagram
Microprocessor
Keyboard
Printer
Dual Station MTWP Specifications
Magnetic Tape Transports
Specifications
Installation
Unpacking
Unpacking the Typewriter Unit
Unpacking the Console Unit
System Interconnections
System Interconnections
Preoperational Checkout
Power Supply Voltage Checkout
System Diagnostic Checkout
Power Supply Voltages
Operation
Keys, Controls, Indicators and Alarms
Basic Operation Keys
Mode Keys
Action Keys
Basic Operation Keys Mode Keys
Encoded Function Codes
Action Keys
Encoded Function Keys
Console Controls and Indicators
Alarms
Operating Instructions
Theory of Operation
Functional Description
Microprocessor
1, Read Only Memory (ROM) Program
Console, Right-Hand Interior View
Card Cage Pwa's
Detailed System Block Diagram
K-Page Memory Structure
ROM Address Register
Return Address Register
ROM Address Register
General Purpose (GP) and Main (M) Registers
Arithmetic Logic Unit (ALU)
Buffer I/O and Buffer Control
Tape Control
Write Encode
Tape Read/Write and Tape Read Only
Motor Control
Bi-Phase Serial Data
Keyboard Interface
Printer Interface
Miscellaneous, Clock and IC
Display Panel
DC Power Supplies
Maintenance
Safety Precautions
Maintenance Philosophy
Objectives
Basic Considerations
Tools and Servicing Aids
Tools
Test Equipment
PDA Controls and Indicators
Power Supply Voltage
Voltage Levels
Logic Levels
Use of Probes
Checks and Adjustments
General
PDA Installation
PDA Installation
PDA Routine Addresses
ROM Test
Branch Test
ROM Tests
Branch Tests
Branch on Data Test
Branch on Data Test "Error Addresses
PDA Test
G-Registers Test
H-Registers Test
ALU Test
Buffers Test
6.11 Data Bus out (Lamp) Test
Data Bus in (Thumbwheel) Test
Data Bus out (Lamp) Test Sequence
Keyboard Strobe Test
Printer Test
Transport Tests
Run Forward Normal Test
Run Reverse Normal Test
Transport Tests Error Analysis
Run Forward Fast Test
Run Reverse Fast Test
Speed Tests
Normal Write Forward Test
Normal Write Forward "Error Addresses
Run Reverse Fast Test
Error Analysis
General
Recommended Troubleshooting Sequence
Pwa's Affected According to Priority
Troubleshooting Chart
Replacement Procedures
General
Printer Removal and Installation
Keyboard Removal and Installation
Transport Removal and Installation
Transport Power Connections
Head Assembly Removal and Installation
Motor Removal and Installation
BOT/EOT Sensor Assembly Removal and Installation
Cassette in Place Switch and File Protect Switch Removal and Installation
General
Cassette Heat Sink
DC Power Supply
Keyboard Logic
PDA ROM and Controls
PDA Switch and Indicator
System Wire List
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MAGNETIC TAPE
WORD PROCESSOR
UD002441-1
FIELD ENGINEERING DIVISION
SEPT., 1972
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Troubleshooting
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Troubleshooting Chart
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