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 machine 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.
Replace the system
board.
Fax Transmission Service Check
• Before performing this service check, verify that the correct country code for the machine is
selected. This setting must match the country in which the machine is used to transmit and receive
6. Troubleshooting
274
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