Canon PIXMA MX850 series Quick Start Manual page 167

The machine is not set to the
appropriate receive mode.
Check the receive mode setting (A), and change it to a mode suited to your
connection if necessary.
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(A)
FAX priority mode
See "If You Are Using a Single Telephone Line for Faxes and Voice Calls and
Want to Receive Faxes Automatically:" on page 91.
FAX only mode
See "If You Want to Receive Only Faxes Automatically with Your Machine, or
Have a Dedicated Telephone Line for Fax Use Only:" on page 91.
ORPO*1
See "If You Subscribe to a Distinctive Ring Pattern Detection (DRPD) Service
with Your Telephone Company (US and Canada only):" on page 93.
Network switch*2
See "If You Want the Machine to Automatically Switch between Fax and Voice
Calls by the Call Ring Patterns (Network Switch):" on page 93.
TEL priority mode
See "If You Are Using a Single Telephone Line for Faxes and Voice Calls and
Use Voice Calls More Frequently:" on page 92.
*1 This setting is only available in US and Canada.
*2 This setting may not be available depending on the country or region of
purchase.
• Machine Does Not Switch Automatically between Voice and Fax Calls
Cause Action
The receive mode, displayed in the
FAX standby screen, is FAX only
mode.
If the receive mode is set to FAX only mode, there will be no automatic
switching between voice and fax calls. Set the receive mode to FAX priority
mode, ORPO*1, or Network switch*2.
If the receive mode is TEL priority mode, connect an answering machine to the
machine and check that a message plays back when the answering machine
answers.
*1 This setting is only available in US and Canada.
*2 This setting may not be available depending on the country or region of
purchase.
• Quality of Received Fax is Poor
Cause Action
ECM RX is set to OFF.
The sender's original document or fax
machine is dirty.
Set ECM RX to ON. Refer to "ECM RX" in "Device Settings" of the User's Guide
on-screen manual.
If ECM RX is enabled, the sender's fax machine resends the fax after correcting
errors automatically.
The image quality of the fax is mainly determined by the sender's fax machine.
Contact the sender and check whether the scanning area of his/her fax machine
is not dirty.
Troubleshooting
163