3-44 Phaser 6250 Color Laser Printer Service ManualInstall or Reseat Transfer Roller■ Ensure the CTD (ADC) Sensor is clean.■ Ensure that the Transfer Roller Assembly is correctly installed.■ Cycle printer power.■ If the problem persists, follow the procedure below.Troubleshooting Reference TableApplicable Parts Wiring and Plug/Jack Map ReferencesCTD (ADC) Sensor Assembly , PL 5.1.11 “Xerographics 1” on page 10-23Transfer Roller Assembly, PL 8.1.12Troubleshooting Procedure TableStep Actions and Questions Yes No1 Check the following parts for damage andreplace if defective:Transfer Roller PL 8.1.12CTD (ADC) Sensor, PL 5.1.11Complete Go to Step 2.2 Clean the CTD (ADC) Sensor to removeany toner build up.Does this fix the problem?Complete Go to Step 3.3 Use service diagnostics to test the CTD(ADC) Sensor.Does the sensor function correctly?Go to Step 4. Go to Step 5.4 Replace the Transfer Roller.Does the error recur?Go to Step 5. Complete5 Is the CTD (ADC) Harness connected tothe CTD (ADC) Sensor correctly?Go to Step 6. Connect properly6 Check J 136 <=> J 1361 on the CTD(ADC) Harness for continuity.Go to Step 7. Replace the CTD(ADC) Harness,RRP 5.2.7 Check J 1361 <=> J 13 on the Front 1AHarness for continuity.Go to Step 8. Replace the Front1A HarnessAssembly,PL 13.1.7.8 Verify the voltage between P/J136-5 <=>P/J136-3 on the Front 1A HarnessAssembly is 0 VDC.Replace the CTD(ADC) Sensor,page 8-42.Replace theEngine ControlBoard,page 8-107.
