4-80 Phaser 6280 Color Laser Printer Service ManualGeneral TroubleshootingElectrical NoiseThere is a variable pitch sound coming from the printer. Electrical noise canbe either noise in the electrical lines or static in electromagneticcommunications.Initial Actions■ Cycle printer power.■ If the problem persists, follow the procedure below.Troubleshooting Reference TableApplicable Parts Wiring and Plug/Jack Map References■ Transfer Unit, PL4.1.1■ HVPS, PL5.1.17■ Print Cartridge (C/M/Y/K),PL5.1.18-21Troubleshooting Procedure TableStep Actions and Questions Yes No1 Check external noise.1. Are there other electrical applianceswithin 3 meters from the printer?2. Turn the electrical appliances Off orrelocate the printer at least 6 meters awayfrom other electrical appliances.3. Does the error still occur?Go to step 2. Complete.2 1. Check the AC ground.2. Is the AC power supply outlet wired andgrounded appropriately?Go to step 3. Request theclient to fixthe AC powersupply outlet.3 1. Reseat the Print Cartridges (page 8-10).2. Reseat the Transfer Unit (page 8-8).3. Does the electrical noise still occur?Go to step 4. Complete.4 1. Check the Print Cartridges for stains ordebris.2. Are the Print Cartridges dirty?Clean thePrintCartridges.Reseat theHVPS(page 8-61).
