yep you have to do process control
urmmmm lemme check my book
05-396 (do it everytime your onsite)
Procedure>
(1) While pressing [0] and [5] simultaneously, turn the power ON. →
Adjustment Mode
(2) Select the A4/LT drawer. Key in the pattern number and press the
press 4 ---- then press fax
prints out a chart... place it on glass ..black rectangles to edge of glass
then do 05-1642
then do the 05 1000 codes for calibration in print mode
its all in the handbook