The Lexmark C770n, C772n, C780n, and C782n Service Repair Manual is a comprehensive guide for technicians and professionals tasked with diagnosing and repairing these Lexmark laser printers. The manual features detailed diagrams, pictures, and step-by-step procedures for a wide range of service tasks. Beginning with essential safety information, notices, and a glossary of acronyms, the manual comprehensively guides users through aspects of printer operation, maintenance, and troubleshooting. It includes in-depth sections on: **General Information:** This section covers vital information on the printer models, service tools, options, features, specifications (power, performance, media), media guidelines, and paper characteristics. **Diagnostic Information:** This section provides an extensive breakdown of diagnostic procedures, including start-up sequences, symptom tables, service error codes, paper jam messages, and service checks for various components. It includes comprehensive troubleshooting guidance, encompassing issues like print quality problems, paper jams, and error codes. **Diagnostic Aids:** This section offers a detailed walkthrough of various diagnostic procedures that aid in troubleshooting printer malfunctions. It includes detailed instructions for accessing service menus, performing specific tests like printhead diagnostics, partial print tests, and hardware tests, and interpreting results. **Registration & Alignment:** The manual offers clear guidance on printhead registration, alignment, and adjustment procedures, including color alignment, drift sensor settings, and belt tracking adjustments. **Print Tests & Hardware Tests:** The manual provides various print tests and hardware tests for validating printer functionality and diagnosing specific issues. It also includes sections on duplex tests, input tray tests, output bin tests, finisher tests, and device tests. **Printer Setup & Configuration:** This section outlines printer configuration procedures, including setting defaults, accessing page counts, adjusting engine settings, accessing error logs, and navigating through the configuration menus. **Paper Jams:** The manual provides detailed information for identifying, understanding, and clearing paper jams in various areas of the printer, including the paper path, mailbox, finisher, output expander, and fuser. It includes visual aids and step-by-step instructions for clearing paper jams effectively. **Repair Information:** The manual provides critical repair information, including guidelines for handling ESD-sensitive parts, screw identification tables, and removal procedures for various printer components. This section includes detailed instructions for removing and replacing components such as covers, lenses, front cover assembly, redrive cap, top cover assembly, paper path access door, handles, rear cover, lower doors, jam access doors, redrive door, autocompensator pick assembly, BOR drive assembly, cartridge contact assembly, cartridge drive assembly, developer HVPS board, friction buckler, light shields, fuser assembly, fuser drive assembly, fuser fan, inner system board shield, ITU assembly, ITU drive assembly, LVPS assembly, media size sensing assembly, media size sensing board, multipurpose feeder (MPF), nip relief handle, operator panel assembly, outer system board shield, pick rolls, printhead, rear bellcrank, registration motor, rib housing, RIP fan, S2/narrow media/transparency cables and sensors, second transfer roll, system board, transfer HVPS board, transfer plate assembly, vacuum transport belt (VTB) assembly, waste container door and latch, and web oiler assembly. **Connector Locations:** This section offers detailed diagrams and information on the locations of connectors and cabling for various components including printer boards, motors, sensors, cartridge contact assemblies, and system board cabling. **Preventive Maintenance:** This section covers safety inspection guides, scheduled maintenance procedures for standard fusers and ITU maintenance kits, lubrication specifications, and lubrication instructions for replacement motors, fuser drive assembly, cartridge drive assembly, and ITU drive assembly. **Parts Catalog:** The manual includes a comprehensive parts catalog for Lexmark C770n, C772n, C780n, and C782n printers. The catalog is organized by assembly and provides part numbers for all components. **Appendix:** The manual includes supplementary information in the appendix, such as service tips, identifying printheads, redrive belt routing, duplex option deflector button replacement, and print quality samples. **Index:** The manual includes a detailed index, making it easy to find specific information quickly. **Part Number Index:** The manual concludes with a part number index, enabling users to locate the correct part number for replacement parts easily.

The Lexmark C770n, C772n, C780n, and C782n are high-performance color laser printers designed for businesses with demanding print needs. These models offer a combination of speed, reliability, and efficiency, making them suitable for various office applications, including document production, presentations, and marketing materials. They feature a robust design and advanced features like duplex printing, network connectivity, and high-capacity paper trays. Their print speeds range from 35 to 45 pages per minute (ppm) for both color and black-and-white documents, ensuring fast turnaround times for even large print jobs. The Lexmark C770n and C780n models come with a standard paper input capacity of 550 sheets, while the C772n and C782n offer an expanded capacity of 1100 sheets, further enhancing productivity. These printers utilize Lexmark's innovative imaging technology, delivering crisp and vibrant color prints with a resolution of up to 1200 x 1200 dpi. They incorporate advanced security features like password protection, network access control, and data encryption to safeguard sensitive information. Moreover, these printers prioritize environmental responsibility by offering features like automatic two-sided printing and low energy consumption modes, contributing to reduced paper and energy usage. Their user-friendly interface and intuitive controls ensure easy operation, minimizing downtime and maximizing efficiency. With their reliable performance, comprehensive features, and commitment to sustainability, the Lexmark C770n, C772n, C780n, and C782n are ideal for businesses seeking a high-quality and efficient color laser printing solution.