HP laserjet 2015 series Servicehandbuch
The laser beam scans the photosensitive drum to neutralize negative charges on parts of the drum.
An electrostatic latent image is formed on the drum where negative charges were neutralized.
An electrostatic latent image is formed on the drum where negative charges were neutralized.
Step 3: Developing
The developing cylinder comes in contact with the photosensitive drum to deposit toner onto the
electrostatic latent image.
electrostatic latent image.
NOTE
The charges on the exposed area of the drum are shown as positive in
Figure 5-9
Developing on page 80
. The charges are actually negative, but they are more positive than
the charges on the developing cylinder.
Figure 5-9
Developing
Toner acquires a negative charge through friction from the developing cylinder and the blade. When
the negatively charged toner comes in contact with the drum, the toner adheres to the electrostatic
latent image. The image on the drum becomes visible because of the toner.
the negatively charged toner comes in contact with the drum, the toner adheres to the electrostatic
latent image. The image on the drum becomes visible because of the toner.
Step 4: Transfer
The transfer charging roller, to which a dc positive bias is applied, imparts a positive charge on the
print media. When the print media comes in contact with the photosensitive drum, the toner is
transferred to the print media.
print media. When the print media comes in contact with the photosensitive drum, the toner is
transferred to the print media.
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Chapter 5 Theory of operation
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