HP LaserJet Pro M402d

Step 5: Separation
The elasticity of the paper and the curvature of the photosensitive drum cause the paper to separate from the
drum surface. The static charge eliminator reduces back side static discharge of the paper for stable paper
feeding and image quality.
Figure 1-17 Separation
Paper
Transfer roller
Static charge eliminator
Photosensitive
drum
Step 6: Fusing
The product uses an on-demand fusing method to fuse the toner image onto the media. The toner image is
permanently aixed to the print media by the heat and pressure. The fusing bias is applied to the pressure
roller to improve image quality.
Figure 1-18 Fusing
Paper
Fuser film
Fuser heater
Pressure roller
Step 7: Drum cleaning
The cleaning blade scrapes the residual toner o the surface of the photosensitive drum and deposits it in the
toner collection box. The drum is now clear and ready for the next image-formation process.
24 Chapter 1 Theory of operation ENWW