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LA30 DECwriter Maintenance Manual
| Company: | Digital Equipment Corporation |
| Part: | DEC-00-LA30-DC |
| Date: | 1972-08 |
| Keywords: | |
Table of Contents
- Chapter 1 Introduction
- 1.1 Scope
- 1.2 General Description
- 1.3 Technical Characteristics
- Chapter 2 Installation
- 2.1 Site Considerations
- 2.2 Unpacking and Inspection
- 2.3 LA30 Installation
- 2.4 Cable Connections
- 2.4.1 Power Cable
- 2.4.2 Interface Cable
- 2.5 Unit Checkout Procedure
- Chapter 3 Operation
- 3.1 Controls and Indicators
- 3.2 Operating Procedures
- 3.2.1 Loading Paper
- 3.2.2 Changing Ribbon
- Chapter 4 Principles of Operation
- 4.1 Overview
- 4.1.1 Dot Matrix
- 4.1.2 Keyboard
- 4.1.3 Electronics
- 4.2 Functional Description
- 4.2.1 Motor Drive System
- 4.2.2 Control Logic
- 4.3 Operating Cycles
- 4.3.1 Print Cycle
- 4.3.1.1 Identify Printing Characters
- 4.3.1.2 Start Function Timers
- 4.3.2 Carriage Return Cycles
- 4.3.3 Line Feed Cycle
- 4.3.4 Character Visibility Cycle
- 4.4 Power Fail (Drawing D-CS-G8004-0-1)
- Chapter 5 Maintenance
- 5.1 Introduction
- 5.2 Cleaning Procedures
- 5.3 Adjustment Procedures
- 5.3.1 Line Feed Pawl and Detent
- 5.3.2 Print Head
- 5.3.3 Impact Loading
- 5.3.4 Left and Right Margin
- 5.4 Replacement Procedures
- 5.4.1 Keyboard Assembly
- 5.4.2 Print Head and Cable Assembly
- 5.4.3 Carriage Assembly
- 5.4.4 Print Bar Assembly
- 5.4.5 Ribbon Drive Motor
- 5.4.6 Ribbon Drive Clutch Assembly
- 5.4.7 Carriage Stepping Motor
- 5.4.8 Drive Belt
- 5.4.9 Keyboard Indicator Lamp
- 5.4.10 Line Feed Solenoid
- Chapter 6 Interfacing
- 6.1 Introduction
- 6.2 Serial Interface
- 6.2.1 General
- 6.2.2 Current Loop Operation
- 6.2.3 M973 Cable Connector
- 6.2.4 M598 Level Converter
- 6.2.5 M7389 Addressable Asynchronous Transceiver (UART)
- 6.2.6 M7731 Serial Interface Control
- 6.3 LA30 Parallel Interface
- 6.3.1 General
- 6.3.2 Timing Differences
- Appendix A LA30 Illustrated Parts Breakdown