Lexmark X464de Service Manual - Page 96

7014-xxx Flatbed home position service check Step 1 2 3 4 5 6 Questions / actions Yes No POR the MFP. Does the CCD move and return to the home position? Problem solved. Go to step 2. Perform the home position sensor test. Go to "Scanner Tests" on page 3-34. Is the sensor working properly? Go to step 3. Go to step 5. Check J28 on the controller board for proper connection. Is it connected properly? Check pin 1 in J28 for voltage. The voltage is only present when a flatbed copy job is running. The voltage should measure +24V AC. Is voltage present? Ensure that the home position cable (J13) is connected. Is the cable connected? Go to step 4. Go to step 5. Go to step 6. Properly connect the cable. Replace the controller board. "Controller board removal" on page 4-8 Properly connect the cable. Check pin 1 in J13 for voltage. The voltage should measure +5V DC. Pin 2 should be GND. Is voltage present and is it correct? Replace the flatbed unit. See "Flatbed removal" on page 4-89. Replace the controller board. "Controller board removal" on page 4-8. 2-58 Service Manual