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Received Faxes Contain Characters Overlapping Each Other when Error Correction Mode (ECM) Is Disabled

Document ID:SO7521

Usergroup :External
08/19/14 Properties  


Print quality issue; Fax PQ issue; Printout problem; Print-out; Letters on top of each other; Figures overlap; Output problem; ECM turned off; Not turned on;


What you will see

When receiving faxes, the printout displays characters that are overlapping each other. See sample image below.

Click Image to Enlarge



Print quality issues may occur when the Error Correction Mode (ECM) fax setting is disabled. ECM automatically detects and corrects errors in the fax transmission process that are sometimes caused by phone line issues.

NOTE: Turn OFF ECM for testing purposes only. If disabling ECM fixes a problem, then you or the recipient should consider contacting your phone line provider.


Recommended action

Ensure that ECM is enabled. To do so, follow either of the following options:

Via the printer Control Panel Via the embedded Web Server (EWS)

Press Menu > Settings > Fax Settings > Analog Fax Setup or Fax Setup > Fax Send or Fax Send Settings > Enable ECM, and select Yes.

Note: Changing this setting may vary per model. Should you need further assistance, please refer to your printer’s User’s Guide or contact Lexmark Technical Support.

Click here to view steps to access EWS.

Select Settings or Configuration > Fax Settings > Analog Fax Setup > Fax Send Settings > Enable ECM, and tick the box.


Still need help?

If you require additional assistance, please close this window, go to your product's support page and locate  Get In Touch with Lexmark! for contact information. NOTE: When calling for support, you will need your printer model/machine type and serial number (SN).

Please be near the products described in this article to expedite the support process and reduce call-back situations.


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