HP d640 HP D640 High-Volume Printer - User Manual (Printer and Accessories), C - Page 259

Evaluate Environmental Conditions, Printer Maintenance, Paper Stacking, Printing Environment

Page 259 highlights

Using Paper Troubleshooting • Synthetic paper • Coated paper • Other special media Refer to Table D-4, "Recommended paper specifications," on page D-10 for a table of recommended media specifications. Printer Maintenance General cleanliness of the printer is the most important part of printer maintenance. Good maintenance improves the performance of any printer. Papers which create a lot of dust and debris in the printer require a more aggressive maintenance schedule. Areas which builds up paper dust heavily are: • pick-up rollers • paper guides Taking extra time to clean and inspect the paper path results in fewer paper jams and cleaner print. If problems continue after cleaning, inspect for wear or damage. Paper Stacking Consider the following guidelines when advising the customer about stacking paper: • Do not store cartons of reams directly on the floor; cartons should be placed on a pallet or on shelves. • Do not stack more than six cartons high. • Stack each carton squarely on top of the other. • Stack each carton upright. • Do not store individual reams in such a manner that they will curl or warp along the edges. • Do not place anything on top of paper, whether it is packaged or unpackaged. • Do not place paper close to heating or air conditioning vents or open windows. Evaluate Environmental Conditions Printing Environment Ideally, the printing environment should be at or near room temperature, and not too dry or too humid. Remember, paper is hygroscopic; it absorbs and loses moisture rapidly. Heat works with humidity to damage paper. Heat causes the moisture in paper to evaporate, while cold causes it to condense on the sheets. Heating systems and air conditioners remove most of the humidity from the room. As paper is opened and used, it loses moisture, causing streaks and smudging. Humid weather or water coolers can cause the humidity to increase in a room. As paper storage is opened and used it absorbs any excess moisture, causing light print and dropouts. Using Paper D-23

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Troubleshooting
Using Paper
D-23
Using Paper
Synthetic paper
Coated paper
Other special media
Refer to Table D-4, “Recommended paper specifications,” on page D-10 for a table of
recommended media specifications.
Printer Maintenance
General cleanliness of the printer is the most important part of printer maintenance. Good
maintenance improves the performance of any printer. Papers which create a lot of dust and
debris in the printer require a more aggressive maintenance schedule.
Areas which builds up paper dust heavily are:
pick-up rollers
paper guides
Taking extra time to clean and inspect the paper path results in fewer paper jams and cleaner
print. If problems continue after cleaning, inspect for wear or damage.
Paper Stacking
Consider the following guidelines when advising the customer about stacking paper:
Do not store cartons of reams directly on the floor; cartons should be placed on a pallet or
on shelves.
Do not stack more than six cartons high.
Stack each carton squarely on top of the other.
Stack each carton upright.
Do not store individual reams in such a manner that they will curl or warp along the edges.
Do not place anything on top of paper, whether it is packaged or unpackaged.
Do not place paper close to heating or air conditioning vents or open windows.
Evaluate Environmental Conditions
Printing Environment
Ideally, the printing environment should be at or near room temperature, and not too dry or too
humid. Remember, paper is hygroscopic; it absorbs and loses moisture rapidly.
Heat works with humidity to damage paper. Heat causes the moisture in paper to evaporate,
while cold causes it to condense on the sheets. Heating systems and air conditioners remove
most of the humidity from the room. As paper is opened and used, it loses moisture, causing
streaks and smudging. Humid weather or water coolers can cause the humidity to increase in a
room. As paper storage is opened and used it absorbs any excess moisture, causing light print
and dropouts.