Canon TR4700 Series, Online Manual, Page: 488 / 542

Poor Quality Fax Received
Check1
Check scan settings of sender's fax device.
Ask the sender to adjust the scan settings of the fax device.
Check2
Is ECM RX set to OFF ?
Select Fax settings > Adv. fax settings > Adv. communication > ECM RX in this order and select ON .
If ECM RX is enabled, the sender's fax device resends the fax after correcting errors automatically.
FAX settings
Check3
Is sender's original document or scanning area of sender's fax device dirty?
The image quality of the fax is mainly determined by the sender's fax device. Contact the sender and ask the
sender to check whether the scanning area of the fax device is dirty.
Check4
Is ECM transmission/reception enabled although the line/connection is poor, or
is the sender's fax device compatible with ECM?
• Select Fax settings > Adv. fax settings > Adv. communication > ECM RX in this order and select ON . •
FAX settings
• Contact the sender and ask the sender to check whether the fax device is set to enable ECM transmission. •
If the sender's or recipient's fax device is not compatible with ECM, the fax will be sent/received without
automatic error correction.
• Reduce the reception start speed on RX start speed in Fax settings > Adv. fax settings > Adv. •
communication .
FAX settings
Check5
Did you confirm paper and print quality settings?
Printout (Copy) Results Are Unsatisfactory
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