This is a comprehensive service manual for the Xerox Phaser 6121MFP, spanning over 500 pages. It includes the following sections:
Introductory, Safety, and Regulatory Information: Important safety and regulatory details are covered here.
Section 1 - General Information: An overview of the printer's operation, configuration, specifications, and consumables.
Section 2 - Theory of Operation: Detailed functional information on print engine components.
Section 3 - Error Codes and Messages: Detailed troubleshooting procedures for error messages and codes generated by resident diagnostics.
Section 4 - General Troubleshooting: Troubleshooting discussions covering the operation of Power On Self Test (POST), Service Diagnostics, and methods for situations where no error indicator is available.
Section 5 - Print-Quality Troubleshooting: Focuses on techniques to correct image quality problems associated with printer output.
Section 6 - Adjustments and Calibrations: Procedures for the adjustment of print engine components.
Section 7 - Cleaning and Maintenance: Periodic cleaning procedures for the printer.
Section 8 - Service Parts Disassembly: Removal procedures for spare parts listed in the Parts List, along with replacement procedures when necessary.
Section 9 - Parts List: Exploded views of the print engine and option FRUs, as well as part numbers for orderable parts.
Section 10 - Wiring Diagrams: Plug/jack locations and wiring diagrams for the print engine are included in this section.
