LA210

This technical manual provides comprehensive information for the Digital Equipment Corporation LA210 letterprinter, intended for field service and customer service engineers. It covers the printer's physical and functional descriptions, including its dot matrix, receive-only operation, and microprocessor-controlled internal architecture.

The document details installation procedures, operational controls, and user-selectable features, encompassing various emulation modes (Standard DEC, IBM/Epson MX80, Graftrax, IBM Graphics Printer). It also provides in-depth programming information, including standard and graphics control characters, as well as escape and control sequences for different emulation modes.

A significant portion of the manual is dedicated to the theory of operation, explaining the internal workings of the printer's control system, communication and I/O processing, data handling, printhead positioning, paper advancement, and power supply. Options and accessories, such as font cartridges, ROM chips, and parallel interfaces, are also described.

Finally, the manual includes extensive troubleshooting guides with flowcharts, self-tests, and tables to diagnose and resolve various failures (power-up, carriage motion, paper feed, print quality, communication). It concludes with detailed mechanical servicing procedures for removing, replacing, and adjusting Field Replaceable Units (FRUs), along with a list of recommended spare parts and a complete specification appendix.