Xerox 3300MFP Service Manual - Page 60

Theory of Operation Print Cartridge In the print cartridge, the OPC unit and the developer unit are housed in a single case. The OPC unit consists of the OPC drum and charging roller, and the developer unit includes toner, toner chamber, supply roller, developing roller, and the blade. Summary ■ Developing Method: Non magnetic 1 element contacting method ■ Toner: Non magnetic 1 element shatter type toner ■ The life span of toner: 4k/8k sheets (ISO 19752 5% Pattern/A4 standard) ■ Toner Residual Sensor: Dot count with CRUM (CRU Monitor) ■ OPC Cleaning: Collect the toner by using cleaning blade + FILM OPC ■ Handling of wasted toner: Collect the wasted toner in the cleaning frame by using cleaning blade ■ OPC Drum Protecting Shutter: None ■ Classifying device for print cartridge: ID is classified by interruption of the frame channel. Developing Roller ■ Rotary Speed: 203.06 mm/sec ■ Roller Bias: -220 V ~ -400 ± 20 V ■ Control Type: Bias PWM Control type ■ Structure: Mono layer ■ Valid Length: 228 mm ■ OD: ϕ 14.07 mm ± 0.05 ■ Shaft material: SUS 303 ■ Life: 8.000 sheets or more Supply Roller ■ Roller Bias: -370 V ~ -550 V ■ Control Type: Bias ■ Valid Length: 220 mm ■ OD: ϕ 11.2 ± 0.1 mm ■ Shaft OD: ϕ 6 mm + 0 / -0.05 ■ Driver: Gear Driver (in a direction opposed to D/R) ■ Sponge Density: 0.45, ± 0.1 g/m3 ■ Life: 8.000 sheets or more 2-18 Phaser 3300MFP Service Manual