Brother International HL-3400CN Service Manual - Page 61
Transfer
UPC - 012502526223
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CHAPTER 4 STRUCTURE OF SYSTEM COMPONENTS 1.4.2 Basic structure of the printing system A toner image is formed through the potential of the OPC belt varying in each of the charger, exposure, development, transfer and cleaning processes. (1) Process of Print System (See Fig.4-9.) i) The OPC belt is biased to the voltage -CBV(V) by the power supply CBV. ii) A negative high voltage is applied to the charger unit by the power supply CHV, and a corona is generated as the result. iii) The developer roller of the toner cartridges is biased to -DBV(V) by the power supply DBV. iv) The frame potential of the transfer drum is GND. I Fusing Unit • • • • • Paper Discharger • • • A Transfer Roller !Cleaning Unit' F 4p • Transfer Drum OPC Belt • • • • • • • • • • t,* Toner !Toner Cartridge' • • • • • • • • • • ;j • • yr Develop ITT IPaper Cleaning Erase Lamp Brade Charger Laser Unit P Fig. 4-9 4-10