Lexmark X464de Service Manual - Page 101

7014-xxx Modem / fax card service check Step 1 2 3 4 5 6 7 8 Questions / actions Yes Is the phone line properly connected to the modem card and the wall jack? Go to step 3. Properly connect the phone line to the modem card and wall jack. Problem resolved. Did this fix the problem? Test the phone line's ability to send and receive calls. Go to step 5. Did the phone line work properly? Use the MFP on a properly functioning phone jack. Did this fix the problem? Problem resolved. Is the modem card cable properly connected to the system board at J8 and the modem card? Go to step 7. Properly connect the modem card cable to the modem card and system board. Did this fix the problem? Problem resolved. Check the modem card cable for continuity. Go to step 8. Is there continuity? Check the voltages from connector J8 on the controller board. Check Pin 12 and 13 for +3.3VDC, Pin 10 for +5VDC. 2, 4, 6, and 8 are grounds. Are the signals or voltages present? Replace the modem card. No Go to step 2. Go to step 3. Go to step 4. Go to step 5. Go to step 6. Go to step 7. Replace the modem card cable. Replace the controller board. See "Controller board removal" on page 4-8. Diagnostics information 2-63