HP Color 9850mfp Service Manual - Page 101
Generation of developing bias Y, M, C and K, Developing bias applied AC + DC
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II UNIT EXPLANATION hp Color 9850mfp Symbol Name [9] Developing unit M [10] Developing unit C [11] Developing unit K [12] Developing sleeve Y [13] Developing sleeve M [14] Developing sleeve C [15] Developing sleeve K [16] Developing regulation plate [17] Scraper magnet roller HV1 High voltage unit 1 M20 Developing motor Y M21 Developing motor M M22 Developing motor C M23 Developing motor K DEVELOPING UNIT Function or method Adhesion of magenta toner to the image transferred on the drum M Adhesion of cyan toner to the image transferred on the drum C Adhesion of black toner to the image transferred on the drum K Conveyance of developer to the drum Y surface by means of magnetic force Two-component developing method (yellow toner + carrier Developing bias applied (AC + DC) DC output range by constant voltage method: -150 to -650 V Conveyance of developer to the drum M surface by means of magnetic force Two-component developing method (magenta toner + carrier Developing bias applied (AC + DC) DC output range by constant voltage method: -150 to -650 V Conveyance of developer to the drum C surface by means of magnetic force Two-component developing method (cyan toner + carrier Developing bias applied (AC + DC) DC output range by constant voltage method: -150 to -650 V Conveyance of developer to the drum K surface by means of magnetic force Two-component developing method (black toner + carrier Developing bias applied (AC + DC) DC output range by constant voltage method: -150 to -650 V Regulation of the spiking amount of developer on the developing sleeve Regulation plate method Scraping of developer on the developing sleeve Magnetic absorption method Generation of developing bias Y, M, C and K Driving of the developing unit Y Driving of the developing unit M Driving of the developing unit C Driving of the developing unit K 2-27