GRAPHTEC FCX4000 Service Manual page 143

(7) Press the F1 (RM SENSOR LEVEL ADJ) key to display the following menu.
(8) Press the F2 key (SENSOR GAIN). The following menu is displayed.
(9) Position the white aria of paper under the Registration Mark Sensor by using the arrow keys.
(10) Press the ENTER key to start registration mark sensor sensitivity adjustment.
(11) The following menu is displayed after adjustment is finished.
Confirm that the level is from the 45 to the 55.
Readjust it again if the level is not from the 45 to the 55.
When making this adjustment, make sure that the media is not laminated.
Use the copy paper for this adjustment.
Replace the registration mark sensor if the level is not from the 45 to the 55 even if it was readjusted.
And then adjust the registration mark sensor level.
(12) Press the ENTER key to complete this adjustment.
(13) Turn off the power.
FCX4000-UM-251-9370
8 ELECTRICAL ADJUSTMENTS
8-32