Phaser 6280 Color Laser Printer Service Manual 3-135Error Messages and CodesADC Sensor Error (High Density)The ADC Sensor has detected high density error.Applicable Chain Link■ Chain Link 092-651: IOT ADC Sensor ErrorInitial Actions■ Ensure the Transfer Unit and surrounding area is free of waste toner.■ Cycle printer power.■ If the problem persists, follow the procedure below.Troubleshooting Reference TableApplicable Parts Wiring and Plug/Jack Map References■ Front Cover Harness, PL1.2.11■ Transfer Unit, PL4.1.1■ Laser Unit, PL5.1.2■ Print Cartridge (C/M/Y/K),PL5.1.18-21■ Main Drive Assembly, PL8.1.2■ MCU Board, PL9.1.20■ Right Side Harness, PL10.1.15■ “Map 1 - Electrical and Drive” onpage 10-9■ “Map 4 - LVPS and MCU Boards” onpage 10-12■ “Xerographic” on page 10-30Troubleshooting Procedure TableStep Actions and Questions Yes No1 1. Check the detailed error code on theControl Panel (press the Up andDown buttons simultaneously).2. Does code “01” display on theControl Panel?Go to step 2. Go to step 10.2 1. Check the Transfer Unit for correctinstallation.2. Is the Transfer Unit correctlyinstalled?Go to step 4. Reseat theTransfer Unit(page 8-8).Go to step 3.3 Does the error still occur? Go to step 4. Complete.4 1. Check the toner density. PerformGradation Test Print (page 5-13):Service Mode > Test Print >Gradation ESS.2. Compare the density of four colorstoner. Is there dark color on theprint?Go to step 5. Replace theMCU Board(page 8-86).
