7-12
Phaser 480 Color Printer
7
Cleaning and Maintenance
Inspecting
Rollers:
Replace the print engine when you see any of the following defects that
affect print quality or reliability:
■
Flat spots.
■
Out of roundness.
■
Cracked rubber.
■
Loss of traction (tackiness) causing consistent pick or feed failures.
Gears:
Replace the print engine when you find gears that show any signs of
serious wear or breakage. Look for these problems:
■
Thinned gear teeth.
■
Bent or missing gear teeth; check especially where a metal gear drives
a plastic gear.
■
Fractured or cracked gears.
Belts:
Inspect the belts for wear. There are three rubber belts in the printer: a
belt from the head motor to the head lift cam, a belt from the drum motor to the
drum pulley, and a belt from the lower eject roller to the upper eject roller. Look
for these problems:
■
Loose rubber particles below the belts indicate a wearing belt.
■
Missing teeth in the belts.
■
Cracking or moderate fraying; a small amount of fraying is inevitable,
so look for other signs of wear before replacing the belt.
Clutches:
Symptoms of a malfunctioning clutch are the printer not picking
paper from the tray or random skewing of the print. In such cases disassemble
and check inside the suspect clutch for a lack of grease, a broken spring, or worn
gear teeth.
