I L-3. Developing Bias - Minolta EPI 054 User Manual

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL
98.04.24
1174SBM1103A
11-3. Developing Bias
A negative voltage (Vb = Developing Bias voltage) is applied to the Sleeve Roller to prevent
a foggy background on the copy. The amount of toner attracted onto the surface of the PC
Drum depends on how much lower the PC Drum surface potential (Vi) is than Vb (i.e., the
potential difference).
• When the potential difference is large, a greater amount of toner is attracted.
• When the potential difference is small, a smaller amount of toner is attracted.
Because the Sleeve/Magnet Roller of this copier is movable, a flat spring is used as the
Bias Terminal which follows the movement of the Sleeve/Magnet Roller.
Bias Terminal
Sleeve/Magnet Roller
1139M018AA
1151T01MCA
Control Signal ON OFF WIRING DIAGRAM
Developing Bias PWB-A PJ11A-8A L H 2-H
M-37