Xerox 4400DT Service Manual - Page 40
Service Technician Cautionary Statements, Procedures, Using the Troubleshooting Procedure
![]() |
View all Xerox 4400DT manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 40 highlights
Service Technician Cautionary Statements I Always turn off the printer and remove the AC power cord, unless instructed to do otherwise in a procedure. This is particularly important when checking continuity between wiring. I If the printer is kept ON, never touch the conductive parts. I Wear an electrostatic discharge wrist strap to help prevent damage to the sensitive electronics on the printer circuit boards. I Wait at least 5 minutes after you have switched OFF the printer power for the Fuser to cool before you work on or around the Fuser. I If checking a specific part with the covers removed and the interlocks, safety and power switches ON, laser beams may be irradiated from the Laser Unit causing a health hazard. Observe proper precautions at all times. I When using service diagnostics to turn motors, drives and/or gears, never touch or interrupt the moving parts as damage to the printer will result. Procedures Using the Troubleshooting Procedures 1. Each Step in a Troubleshooting Procedure instructs you to perform a certain action or procedure. The steps are to be followed sequentially in the order given until the problem is fixed or resolved. 2. The Actions and Questions box contains additional information and/or additional procedures you must follow to isolate the problem. 3. When a procedure instructs you test a component using service diagnostics, see Service Diagnostics on page 2-7 for the detailed steps and functions for testing parts of the printer. 4. The action is followed by a question. If your response to the question is "Yes", then follow the instructions for a "Yes" reply. If your response to the question is "No", then follow the instructions for a "No" reply. 5. Troubleshooting Procedures may ask you to take voltage readings or test for continuity at certain test points within the printer. For detailed diagrams, refer to the section Wiring Data on page 9-1 for complete information on test point locations and signal names. 6. Troubleshooting Procedures often ask you to replace a printer component. The section FRU Disassembly on page 6-1 provides detailed steps for removing and replacing all major parts of the printer. The section Parts Lists on page 7-1 details the location, quantity and part number for all spared parts of the printer. Phaser 4400 Laser Printer Service Manual 2-3
![](/manual_guide/products/xerox-4400dt-service-manual-3b9e87c/40.png)