Xerox Phaser 5500 series Manuel complémentaire - Page 8

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Questions and Answers

Drums And fusers

Q: Are yields for drums and fusers also based on ISO/IEC standards?

A: Currently there are no ISO/IEC standards for reporting life on drums, imaging units

or fusers. Yields on these components are not significantly influenced by print area

coverage.

Q: What is a drum?

A: Drums collect toner-imaged information and transfer it to a sheet of paper. While

most black-and-white printers combine the toner and drum into one cartridge, a

majority of color printers separate the drum and toner cartridges.

Q: What impacts drum yields?

A: Average job size has the highest impact on drum yields. Drum yield testing often

utilizes average job sizes of three to four pages — which reflect average office usage

patterns. Customers who print only very short print jobs (where the average job size

is one to two pages) will see reduced drum yields, while customers whose job size

averages four or more pages are more likely to realize the full stated drum yield.

Many printers and MFPs capable of using 11 x 17 in. (or A3) paper have input trays

that allow letter/A4-size paper to feed in either the long-edge or short-edge direction.

Drum life can be maximized by feeding letter/A4 paper in the long-edge direction, as

it decreases wear on the drum (and maximizes output speed). If you are unfamiliar

with long-edge vs. short-edge feeding, consult your printer or MFP user manual.

Note — Some printer and MFP OEMs publish drum yields based on one "continuous

run" print job — where one infinitely long print job runs until the drum wears out. Yields

reported by this testing do not reflect real office printing conditions, and users can

end up realizing noticeably lower actual yields. Xerox will list average-tested-job-size

information when publishing stated drum yields, and suggests customers inquire about

average tested job size to ensure stated yield is based on real office printing conditions.

Q: What is a fuser?

A: A fuser is a rubber roller with a heating element inside. It melts and fuses the toner

onto the sheet of paper.

Q: What impacts fuser yields?

A: Fusers usually have long lives (100,000 pages or more). Fuser yield is impacted most

by stress placed on the heating element or heat regulators, which can lead to early

fuser failure (fusers are generally not impacted by page coverage or average job size).

Media type, size and weight have the highest effect on fuser stress. For example, long

print runs on narrow media like envelopes can contribute to early fuser failure —

envelopes absorb heat from only a small section of the fuser, causing the rest of the

fuser to overheat. Envelopes are also at least twice as thick as regular paper, causing

more heat absorption to occur along their path.

Note — Xerox tests fuser life primarily by using standard laser printer paper, as this is

the most often used media in office environments. Specifically, fuser yields are based on

A4/letter size pages of 20 lb. (75 gsm) weight.