Olivetti d-Copia 163MF Service Manual

Also see for d-Copia 163MF: Operation guide

2-1-72-1-4 Developing section(1) Developer unitThe latent image constituted on the drum is developed into a visible image. The developing roller contains a 3-pole (S-N-S) magnet core and an aluminum cylinder rotating around the magnet core. Toner attracts to the developing roller since itis powdery ink made of black resin bound to iron particles. Doctor blade, magnetized by magnet, is positioned approxi-mately 0.30 mm above the developing roller to constitute a smooth layer of toner in accordance with the roller revolution.The developing roller is applied with the AC-weighted, positive DC power source. Toner on the developing roller is given apositive charge. The positively charged toner is then attracted to the areas of the drum which was exposed to the laserlight. (The gap between the drum and the developing roller is 0.32 mm.) The non-exposed areas of the drum repel thepositively charged toner as these areas maintain the positive charge.The developing roller is also AC-biased to ensure contrast in yielding by compensating the toner’s attraction and repellingaction during development.Figure 2-1-8 Developer unit and toner containerNS0.30 mm0.32 mmS1S2 250N193Drum(1) DLP case(2) Magnet roller(3) Developing sleeve(4) DLP screw A(5) DLP screw B(6) Doctor blade(7) DLP shutter(8) Toner containerY107330-8 Service Manual