Safety xiManual OrganizationThe Phaser 7400 Color Printer Service Manual is the primary document used forrepairing, maintaining, and troubleshooting the printer. The manual is organized intotwo books. This volume, Book 1, focuses on the print engine with the exception ofproviding complete diagnostic and troubleshooting procedure for the printer and allits options. Book 2 focuses on option repair and includes an overview of optiontheory, option Field Replaceable Unit (FRU) replacement procedures, parts lists, andwiring diagrams. Use Book 2 after you’ve isolated a problem internal to a specificoption or when a problem arises at the engine/option interface.Book 1 - Print EngineUse Book 1 as your primary resource for understanding the operational characteristicsof the print engine. Book 1 describes printer specifications, theory and includesinformation important to the diagnosis and repair of problems occurring in the printengine and attached options. Book 1 also provides detailed print engine replacementprocudures, parts lists, and wiring diagrams.Book 1 contains these sections:Introductory, Safety, and Regulatory Information: This section containsimportant safety information and regulatory requirements.Section 1 - General Information: This section contains an overview of theprinter’s operation, configuration, specifications, and consumables.Section 2 - Theory of Operation: This section contains detailed functionalinformation on print engine components.Section 3 - Error Codes and Messages: This section describes the residentdiagnostics available to assist the troubleshooting process. These diagnostics includeerror codes and messages and Service Usage Profile data stored in the printer. Thissection provides complete troubleshooting information for the print engine and all it’soptions.Section 4 - General Troubleshooting: Troubleshooting discussions cover theoperation of Power On Self Test (POST), Service Diagnostics, In addition, thissection includes troubleshooting methods for situations where no error indicator isavailable.Section 5 - Print-Quality Troubleshooting: This section focuses on techniquesto correct image quality problems associated with printer output.Section 6 - Adjustments and Calibrations: This section provides proceduresfor the adjustment of print engine components.Section 7 - Cleaning and Maintenance: This section provides periodic cleaningprocedures for the printer.
