Xerox M20/M20i User Manual page 202

PROBLEM
Originals cannot be received
even if [Start] is pressed
Paper is not collated
The received original is printed
dark and is illegible or black
stripes are printed on the
original
Paper is collated but not printed.
Page 11-20
SUGGESTED SOLUTION
Ensure the bell rings before picking up the handset.
Ensure the handset is not replaced before pressing [Start]. When
answering a call using the handset and a Fax is being received, do
not replace the handset until [Start] is pressed and the phone line
switches to the machine.
Check the telephone cord has not been disconnected.
Check the power plug has not been unplugged from the power
outlet.
Check with the party trying to send the original that there are no
problems with the remote fax.
Ensure the machine has paper loaded.
Check if a paper jam has occurred.
Check with the party sending the original that the original is a
clean copy.
Check with the party sending the original that the problem is not
due to a fault or operator error at the remote Fax. For example,
dirty scan glass or dirty scan lamp.
If the same problem occurs even when copies are made on the
machine, clean the drum. Refer to "Maintenance Tools" on page 9-
25 for instructions.
Ensure there enough toner.
Check with the party sending the fax that the original was placed
correctly when scanned at the remote Fax.
Xerox CopyCentre C20, WorkCentre M20 and WorkCentre M20i User Guide