HP HP LaserJet Printer 8000 Service Manual download pdf (Page 455)

100

101

General Troubleshooting Information

431

Paper Curl

Paper curl is inherent to the laser printing processes, as it occurs

when paper is subjected to heat. Paper curl tends to relax as the

paper cools while resting on a flat surface. The specification for

maximum paper curl when the paper is lying flat before print is 0.2

inches (5 mm).

Although paper curl cannot be totally eliminated, some steps can be

taken to lessen its impact, as suggested in the following table.

Table 7-30. Paper Curl

Possible Cause Recommended Action

1. Paper Path

Try using Tray 1 and output the paper to the left output bin.

2. Paper Surface The recommended printing surface of the page is usually marked on the end of a

ream of paper, indicated by a small arrow and the phrase “print this side first.”

Load paper in Tray 1 with the recommended printing surface facing up (facing

down in Trays 2, 3, 4, and 5).

3. Paper Storing and

Handling

Over time, paper assumes the characteristics of its storage environment (in a

humid environment, paper absorbs moisture; in a dry environment, paper loses

moisture). Paper with higher moisture content will tend to curl more. Evaluate the

storage conditions of the paper.

4. Paper Type All paper is manufactured differently (different textures, moisture content, drying

processes, composition, etc.). Change the type of paper being used and

re-evaluate the paper curl results.

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HP HP LaserJet Printer 8000 Service Manual Page 455

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