Fax Reception Service Check - Lexmark CX310n Service Manual

Actions
Step 1
Is the phone line properly connected to the modem card and the wall jack?
Step 2
Properly connect the phone line to the modem card and wall jack.
Did this fix the problem?
Step 3
Test the phone line's ability to send and receive calls.
Did the phone line work properly?
Step 4
Use the MFP on a properly functioning phone jack.
Did this fix the problem?
Step 5
Is the modem card ribbon cable properly connected to the system board
at JMOD2 and the modem card?
Step 6
Properly connect the modem card cable to the modem card and system
board.
Did this fix the problem?
Step 7
Check the modem card ribbon cable for continuity.
Is there continuity?
Step 8
Check the voltages from connector JMOD2 on the controller board. Check
Pin 4 and 5 for +3.3VDC. Pin 7 for +5VDC. 9, 11, 13, 15, 17, and 19 are
grounds.
Are the signals or voltages present?

Fax reception service check

Note: Before performing this service check, verify that the correct country code for the MFP is selected. This setting
must match the country in which the MFP is used to transmit and receive faxes. If the setting is wrong, the modem
settings can be changed in the Fax/SE menu. See step 14. These settings should only be performed with guidance
from your second-level support. See"ADF feed errors service check" on page
Diagnostic information
144
Yes No
Go to step 2. Go to step 3.
Problem resolved. Go to step 3.
Go to step 5. Go to step 4.
Problem resolved. Go to step 5.
Go to step 7. Go to step 6.
Problem resolved. Go to step 7.
Go to step 8. Replace the modem
card cable.
Replace the fax card. Replace the controller
board. See
board removal" on
page
141.
7527
"Controller
239.