Safety xi
Manual Organization
The Phaser 6300/6350 Color Laser Printer Service Manual is the primary document 
used for repairing, maintaining, and troubleshooting the printer. Use this manual as 
your primary resource for understanding the operational characteristics of the printer 
and all available options. This manual describes specifications, theory, and the 
diagnosis and repair of problems occurring in the print engine and attached options. 
Also included are detailed replacement procedures, parts lists, and wiring diagrams.
The Phaser 6300/6350 Color Laser Printer Service Manual contains these sections:
Introductory, Safety, and Regulatory Information: This section contains 
important safety information and regulatory requirements.
Section 1 - General Information: This section contains an overview of the 
printer’s operation, configuration, specifications, and consumables.
Section 2 - Theory of Operation:  This section contains detailed functional 
information on print engine components.
Section 3 - Error Codes and Messages: This section provides detailed 
troubleshooting procedures for error messages and codes generated by resident 
diagnostics. 
Section 4 - General Troubleshooting: Troubleshooting discussions cover the 
operation of Power On Self Test (POST), Service Diagnostics, In addition, this 
section includes troubleshooting methods for situations where no error indicator is 
available. 
Section 5 - Print-Quality Troubleshooting:  This section focuses on techniques 
to correct image quality problems associated with printer output.
Section 6 - Adjustments and Calibrations: This section provides procedures 
for the adjustment of print engine components.
Section 7 - Cleaning and Maintenance: This section provides periodic cleaning 
procedures for the printer.
Section 8 - Service Parts Disassembly: 
This section contains removal 
procedures for spare parts listed in the Parts List. A replacement procedure is included 
when necessary. 
Section 9 - Parts List: This section contains exploded views of the print engine 
and option FRUs, as well as part numbers for orderable parts.
Section 10 - Wiring Diagrams: This section contains the plug/jack locations and 
the wiring diagrams for the print engine.
Appendix A - Reference: This section provides an illustration of the printer’s 
menu structure, a listing of printer status codes, and a list of Service Diagnostics tests.