The Epson FX-850 / FX-1050 User’s Manual is the primary guide to setting up, operating, and programming these 9-pin dot-matrix printers, covering both the narrow (FX-850) and wide-carriage (FX-1050) models in one book. It walks you through unpacking, installing the ribbon and paper guide, choosing a location, running the built-in self-test, and connecting via the parallel interface; then it explains single-sheet and tractor-fed continuous paper handling (including micro-adjust and short tear-off), using the control panel, and basic troubleshooting. For developers, it includes full specifications plus DIP-switch charts, interface details, and a summary of Epson ESC/P control codes and international character sets so you can drive the printer directly from your own software.