Brother Facsimile Equipment MFC7420 - Manual (Page 224)

Confidential 9-36
I-11 Faulty registration
Possible cause Step Check Result Remedy
Excessive
paper load 1 Is the paper loaded in the
paper tray more than 27mm
high? Yes Instruct the user to keep paper
loads below 27mm in depth.
2 Is the specified weight of
the recommended paper
being used? No Recommend to use the specified
types of paper. Print paper
3 Is the first printing position
within ±1mm of the
tolerance specification? Yes Adjust the Y offset by using the
utility software supplied.
Regist rear
sensor
position
incorrect 4 Is the regist rear sensor off
from the correct position? Yes Reposition the sensor to the
correct position.
Drum unit
failure 5 Is the rotation torque of the
drum unit heavy? Yes Replace the drum unit.