Diagnostics information 2-63
Modem / fax card service check
Step Questions / actions Yes No
1 Is the phone line properly connected to the
modem card and the wall jack?
Go to step 3. Go to step 2.
2 Properly connect the phone line to the
modem card and wall jack.
Did this fix the problem?
Problem resolved. Go to step 3.
3 Test the phone line’s ability to send and
receive calls.
Did the phone line work properly?
Go to step 5. Go to step 4.
4 Use the MFP on a properly functioning
phone jack.
Did this fix the problem?
Problem resolved. Go to step 5.
5 Is the modem card cable properly
connected to the system board at J8 and the
modem card?
Go to step 7. Go to step 6.
6 Properly connect the modem card cable to
the modem card and system board.
Did this fix the problem?
Problem resolved. Go to step 7.
7 Check the modem card cable for continuity.
Is there continuity?
Go to step 8. Replace the modem card
cable.
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?
Replace the modem card.
See “Modem card
removal” on page 4-46.
Replace the system board.
See “System board
removal” on page 4-36.
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