This document is the user manual for Lexmark 840 Series printers, providing information on installation, usage, and maintenance of the printer.
This manual covers the installation of the Lexmark 840 Series printer, including unpacking, connecting power and USB, and loading ink cartridges. It also describes the printer’s components, safety warnings, and warranty information.
The guide explains how to operate the printer, adjust printing settings, clean and calibrate the print head, replace consumables, and resolve common issues such as indicator‑light problems or slow printing. Contact information for Lexmark Support and the Solution Center is also provided. This manual is written in Chinese.
Remove the old cartridge and install a new one as described in the replacement section.
Check the troubleshooting section for the “indicator light not lit” problem and follow the recommended steps.
Follow the cleaning procedure outlined in the manual under the cleaning section.
Contact Lexmark’s Solution Center or Customer Support using the phone numbers and website listed in the manual.