Remedy: 1 Check the Imaging Unit part number. Is the Imaging Unit a genuine Xerox Phaser 6300/6350 part? Go to Step 2. Replace the Imaging Unit. 2 Check the Imaging Unit for damage. Is the Imaging Unit damaged? Replace the Imaging Unit. Go to Step 4. 3 Replace the Imaging Unit. Does the error persist? Go to Step 5. Complete 4 Check the CRUM connection. Is P/J710 connected to the harness? Go to Step 3. Connect the CRUM 5 Check all pins on the PHD2 Harness PL7.1.7 for continuity. 1. Disconnect P/J710 and P/J484. 2. Check continuity between J710 <=> J484. Go to Step 4. Replace the PHD2 Harness. 6 Check all pins on the FAN/PHD/MOT Harness PL10.1.9 for continuity. 1. Disconnect P/J48 and P/J484. 2. Check continuity between J48<=>P484. Go to Step 5. Replace the FAN/ PHD/MOT Harness. 7 Replace the Imaging Unit. Does the error persist? Replace the Engine Control Board. Complete