Tektronix PHASER 840 Quick Reference Manual page 108

Reverse these steps to reinstall the drum/transfix assembly. Upon reassembly,
install the hex-keyed screws first; they align the drum/transfix assembly to the
engine frame.
Make these adjustments after installing a new drum.
a.
Ensure the drum position encoder sensor gap.
b.
Set the Y-belt tension; refer to the topic "Y-axis belts tension
adjustment" on page 64.
c. Power up the printer in Bypass Mode to skip the startup and mud
pages.
d. Select service test print 10: Manufacturing Paper Path to verify the
paper path and that all ink jets operate.
e. Print service test print 9: Seal Drum to seal the new drum.
f. Perform the printhead to drum adjustment described in the topic
"Printhead-to-drum spacing adjustment" on page 70.
98 Phaser 840 Color Printer