HP Color LaserJet 8500 Service Manual - Page 192

Fusing and delivery unit The upper and lower rollers in the fuser and the face-up and facedown delivery rollers are driven by the main motor (M4). Paper separated from the transfer drum is fed into the fuser and delivered from the unit via the fusing roller and the fusing delivery roller. The fusing delivery sensor detects paper delivered from the fuser. The printer has a left (face-up) output bin and a top (face-down) output bin, and diverts the media to the output bins using the face-up flapper. When the face-up output bin solenoid drive signal turns off, the face-up solenoid moves the face-up flapper to face the face-up output bin. From there, the paper is delivered to the face-up output bin. When the face-up solenoid drive signal turns on, the paper is delivered to the face-down output bin. Paper delivered to the facedown output bin is detected by the face-down output bin delivery sensor. When paper fills the face-down output bin, it is detected by the face-down output bin paper-full sensor. 190 Chapter 5 - Theory of operation EN