The Phaser 7400 Color Printer Service Manual is the primary document used for repairing, maintaining, and troubleshooting the printer. The manual is organized into two books. This volume, Book 1, focuses on the print engine with the exception of providing complete diagnostic and troubleshooting procedure for the printer and all
its options. Book 2 focuses on option repair and includes an overview of option theory, option Field Replaceable Unit (FRU) replacement procedures, parts lists, and wiring diagrams. Use Book 2 after you’ve isolated a problem internal to a specific option or when a problem arises at the engine/option interface.
Use Book 1 as your primary resource for understanding the operational characteristics of the print engine. Book 1 describes Xerox Phaser 7400 specifications, theory and includes information important to the diagnosis and repair of problems occurring in the print engine and attached options. Book 1 also provides detailed print engine replacement
procudures, parts lists, and wiring diagrams.
Use Book 2 as a reference when servicing printer options. Book 2 includes information important for the repair or replacement of option components. Use the troubleshooting procedures in Book 1 to diagnose and isolated the problem.