Phaser 6121MFP Service Manual 4-29General TroubleshootingElectrical NoiseThere is a variable pitch sound coming from the printer. Electrical noise can beeither noise in the electrical lines or static in electromagnetic communications.Initial Actions• Cycle printer power.• If the problem persists, follow the procedure below.Troubleshooting Reference TableApplicable Parts Wiring and Plug/Jack Map References■ HVPS, PL4.1.19■ Fuser, PL11.0.18■ Imaging Unit, PL4.1.21Board Locations (page 2-10)Main Engine Component Overview(page 2-10)Troubleshooting Procedure TableStep Actions and Questions Yes No1 Check external noise.■ Are there other electrical applianceswithin 3 meters of the printer?■ Turn the electrical appliances Off orrelocate the printer at least 6 metersaway from other electrical appliances.Does the electrical noise still persist?Go to step 2. Complete.2 Check the AC ground.Is the AC power supply outlet wired andgrounded appropriately?Go to step 3. Request theclient to fixAC powersupplyoutlet.4 Check the High Voltage Board and the sixhigh voltage springs for dirt.If dirty, remove the High Voltage Boardand clean it and the six springs.(page 8-57).Does the electrical noise still persist?Go to step 5. Complete.5 Reseat the Imaging Unit and the Fuser. Complete.
