HP LaserJet 6p/mp Service Manual - Page 63
Image formation system, Toner cartridge - fuser replacement
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Image formation system Laser printing requires the interaction of several different technologies (such as electronics, optics, and electrophotographics) to provide a printed page. Each process functions independently and must be coordinated with the other printer processes. Image formation consists of six processes: Step 1 Drum Cleaning Step 2 Drum Conditioning Step 3 Image Writing Step 4 Image Developing Step 5 Image Transferring Step 6 Image Fusing Electrostatic Latent Image Formation Block 2. Scanning Exposure Flow of Paper Direction of Drum Manual Feeding Slot Multi-Purpose Tray 1. Primary Charging 3. Developing Drum Cleaning Block 7. Drum Cleaning Paper Delivery Fuser Block 6. Fusing 5. Separation 4. Transfer Transfer Block Registration Figure 5-4 Image formation block diagram Toner cartridge As the "heart" of the Image Formation System, the toner cartridge houses the cleaning, conditioning, and developing steps of the process. The toner cartridge contains the photosensitive drum, primary charging roller, developing station, toner cavity, and cleaning station. Including these components, which wear, degrade, or are consumed in the replaceable toner cartridge, eliminates the need for a service call when replacement is required. The special photosensitive properties of the drum allow an image to be formed on the drum surface and then transferred to paper. CAUTION The printer's toner cartridge does not include a light-blocking shutter. Be careful to avoid exposing the drum to light, which can permanently damage the drum. Protect the cartridge whenever removing it from the printer. EN Image formation system 61