3-4 Phaser 3450 Laser Printer Service ManualServicing InstructionsThe Service Flowchart is an overview of the path a service technician should take,using this technical manual, to service the print engine and options. If you choose notto use the Service Flowchart, it is recommended that you start at the appropriatetroubleshooting table and proceed from there.Always follow the safety measures detailed in the front of the manual when servicingthe printer. See “Service Safety Summary” on page vii .Step 1: Identify the Problem:1. Verify the reported problem does exist.2. Check for any error codes and write them down.3. Print normal customer prints and service test prints.4. Make note of any print quality problems in the test prints.5. Make note of any mechanical or electrical abnormalities present.6. Make note of any unusual noise or smell coming from the printer.7. View the fault history and jam history under the Service Tools Menu.8. Verify the AC input power supply is within proper specifications by measuring the voltageat the electric outlet while the printer is running.Step 2: Inspect and Clean the Printer:1. Switch OFF printer power.2. Disconnect the AC power cord from the wall outlet.3. Verify the power cord is free from damage or short circuit and is connected properly.4. Remove the Print Cartridge and protect it from light.5. Inspect the printer interior and remove any foreign matter such as paper clips, staples,pieces of paper, dust or loose toner.6. Do not use solvents or chemical cleaners to clean the printer interior.7. Do not use any type of oil or lubricant on printer parts.8. Use only an approved toner vacuum.9. Clean all rubber rollers with a lint-free cloth, dampened slightly with cold water.10. Inspect the interior of the printer for damaged wires, loose connections, toner leakage,and damaged or obviously worn parts.11. If the Print Cartridge appears obviously damaged, replace with a new one.Step 3: Find the Cause of the Problem:1. Use the Error Messages and Codes and troubleshooting procedures to find the cause ofthe problem.2. Use Diagnostics to check printer and optional components.3. Use the Wiring Diagrams and Plug/Jack Locator to locate test points.4. Take voltage readings at various test points as instructed in the appropriatetroubleshooting procedure.5. Use the "Front Panel Test Print" on page 5-3, to isolate problems with the Main Board.
