Basic Purpose Printer LB20

This document is a comprehensive user guide for the Digital Basic Purpose Printer LB20, available in Serial (LB20A-AA) and Parallel (LB20B-AA) 9-pin dot matrix models. It provides detailed instructions for the installation, setup, operation, and maintenance of the printer.

Key aspects covered include:

• Introduction: Outlines the printer's purpose, its ability to print on passbooks, envelopes, and forms (up to 2mm thick) in IBM Proprinter III emulation, and its ease of use.
• Installation: Guides users through unpacking, setting up the operating space, removing transport locks, installing physical components like the trapdoor and document guide, connecting power and communication cables, and installing the ink ribbon cassette.
• Setup: Explains how to configure software settings using the printer's Button Bar to navigate various menus (COM, IBM, DOC, DFT, HQD). It details parameters for communication, IBM Proprinter III emulation (e.g., font, CPI, LPI), and document-specific settings (e.g., cover offset, passbook range, smudging).
• Operation: Describes everyday usage, including controls and indications, running a confidence test, loading documents (with warnings about document types), stopping printing, and clearing document jams.
• Maintenance: Provides procedures for ensuring printer performance and longevity, such as replacing the ink ribbon cassette (recommended every 2.5 million characters or 2 years), inspecting and cleaning the Mylar cassette, and removing/reinstalling the printhead. It also covers cleaning sensors and feed rollers.
• Specifications: Details the printer's physical characteristics (dimensions, weight), interfaces (RS232C, Centronics), printing speed, ink ribbon life, power requirements, environmental conditions, and acoustical noise. It also includes extensive document specifications for forms and passbooks, including size, margins, and paper thickness/weight.
• Glossary: Defines technical terms used throughout the guide.

The guide emphasizes the importance of correct software settings for handling various customer documents and provides warnings, cautions, and notes for safe and effective use.