Phaser 6121MFP Service Manual 4-3General TroubleshootingServicing InstructionsThe service checklist below is an overview of the path a service technician shouldtake when servicing the printer and printer optional equipment.Step 1: Identify the Problem1. 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 Jam Counter and Trouble Counter pages on the Service menu.8. Verify the AC input power supply is within proper specifications bymeasuring the voltage at the electric outlet while the printer is running.Step 2: Inspect and Clean the Printer1. Turn the printer power Off.2. Disconnect the AC power cord from the wall outlet.3. Verify the power cord is free from damage or short circuit and isconnected properly.4. Remove the Print Cartridge and protect them from light.5. Inspect the printer interior and remove any foreign matter such aspaper 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 withcold water and mild detergent.10.Inspect the interior of the printer for damaged wires, looseconnections, toner leakage, and damaged or obviously worn parts.11.If the Print Cartridges appear obviously damaged, replace with newones.Step 3: Find the Cause of the Problem1. Use the error messages and Codes and troubleshooting procedures tofind the cause of the problem.2. Use Service Diagnostics to check the printer and optional components.3. Use the Wiring Diagrams and Plug/Jack Locator to locate test points.4. Take voltage readings as instructed in the appropriate troubleshootingprocedure.Step 4: Correct the Problem1. Use the Parts List (page 9-1)to locate a part number.2. Use the FRU Disassembly procedures to replace the part.Step 5: Final CheckoutTest the printer to ensure you have corrected the initial problem and thereare no additional problems present.
