Modem / Fax Card Service Check - Lexmark X46x series Service Manual

Modem / fax card service check

Step
1 Is the phone line properly connected to the
modem card and the wall jack?
2 Properly connect the phone line to the
modem card and wall jack.
Did this fix the problem?
3 Test the phone line's ability to send and
receive calls.
Did the phone line work properly?
4 Use the MFP on a properly functioning
phone jack.
Did this fix the problem?
5 Is the modem card cable properly
connected to the system board at J8 and the
modem card?
6 Properly connect the modem card cable to
the modem card and system board.
Did this fix the problem?
7 Check the modem card cable for continuity.
Is there continuity?
8 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?
Questions / actions Yes
Go to step 3.
Problem resolved.
Go to step 5.
Problem resolved.
Go to step 7.
Problem resolved.
Go to step 8.
Replace the modem card.
7014-xxx
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.
2-63
Diagnostics information