Lexmark X502N - Modem; Fax Card Service Check

Diagnostic information 2-43
7100-XXX
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 2. Properly connect the phone
line to the modem card and
wall jack.
2 Is the modem card cable properly
connected to the system board at J-FAX-1
and the modem card?
Go to step 3. Properly connect the
modem card cable to the
modem card and system
board.
3 Check the modem card cable for continuity.
Is there continuity?
Go to step 4. Replace the modem card
cable.
4 Check the voltages from connector J-
FAX1on the RIP card. Check pins 1 and 2
for +3.3V. Pins 24, 27 and 28 are grounds.
Are there signals or voltages present?
Replace the modem card.
See “Modem card
removal” on page 4-45.
Replace the system board.
See “System board
removal” on page 4-36.