Tektronix Phaser 780 Color, Service Quick Reference Manual

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64
Phaser 780 Color Printer
Damaged prints
The printed page exits the printer either wrinkled, creased, or torn. The printer
neither jams nor displays an error code.
The following components are associated with this specific problem. One or more
of these components may have failed partially or completely. If you cannot isolate
the problem, replace each component listed below, one at a time, until the
problem disappears. Check the media settings at the printer driver.
■
Paper feeder (usually appears without toner in creases or wrinkles)
■
Fuser)
■
Accumulator belt (usually appears with toner in creases or wrinkles)
1.
Check that the paper tray’s metal hooks (at the corners of the leading
edge of the paper in the tray) are not bent or deformed.
2. Feed paper out of each of the available paper feeders. Is the paper
damaged when fed out of one tray but not when fed out of the others? If
so, inspect the tray for damage and check the paper to ensure it is correct.
3.
Is the paper damaged when fed out of multi-purpose tray? Inspect the
multi-purpose tray for debris or obviously broken components that could
be damaging the paper as it feeds out of the assembly and into the printer.
4. Inspect the paper feeder for debris or broken components?
5. Generate a test print and open the front cover just as the sheet of paper is
moving through the registration rollers (about 1 second after you hear
paper feeding start).
6.
Carefully slide the paper feeder out of the printer and inspect the sheet of
paper. Is the sheet of paper undamaged as it leaves the registration
rollers? If yes, replace the metal registration roller and the rubber
registration roller.
7.
Generate a test print and open the front cover just before the sheet of
paper reaches the fuser. Open the front cover and inspect the sheet of
paper. Is the sheet of paper undamaged as it leaves the second bias
transfer roller? If yes, replace the second bias transfer roller.
8.
Generate a test print and open the front cover just as the sheet of paper
exits the fuser. Inspect the sheet of paper. Is the sheet of paper damaged
as it exits the fuser? If yes, replace the fuser.
9. Generate a test print and open the upper exit cover just as the sheet of
paper reaches exit roller. Inspect the sheet of paper. Is the sheet of paper
undamaged as it nears exit roller? If no, clean or replace the lower exit
assembly and the upper exit assembly. Is the sheet of paper undamaged
until it reaches exit roller? If yes, replace exit roller.