Brother International HL-3400CN Service Manual - Page 68

HL-3400CN SERVICE MANUAL (2) First Transfer Process (Refer to Fig.4-18.) i) The OPC belt has been through the development process and contacts and synchronizes with the transfer drum. ii) The OPC belt has been biased to the potential of -CBV(V). The potential of the transfer drum is nearly GND. iii) Toner on the OPC belt is moved onto the transfer drum due to the difference of potential between the OPC belt and the transfer drum. iv) Toner that has been developed by each color in sequence is moved from the OPC belt onto the transfer drum and the color toner images overlap on the transfer drum. v) Upon completion of the drum transfer process, the complete toner image is transferred onto paper in the paper transfer process. OPC belt Residual charge O O O 0 OO O O 0 8 C C O OO C • / ....;, •vi O • 0 O O Residual toner ( I Belt discharging (Erase lamp) Drum transferring Belt cleaning (Blade) Fig. 4-18 4-17