A possible cause may be that the platen glass or feeder is dirty, or the send settings are not proper. Check the following.
Isn't the platen glass or feeder dirty?
Clean the platen glass or feeder. If cleaning does not improve the results, the recipient's fax machine may be a cause.
Are the send settings correct?
Of the send setting items, check the image quality settings. If necessary, change the settings.
Did you change the default send settings?
If you changed the default settings by <Change Default Settings (Fax)>, initialize the settings to restore the factory default ones.
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