Developing Bias - Minolta Di 620 Manual

1155SBM1103A

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 sur-
face 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.
1st Sleeve/Magnet Roller
CONTROL SIGNAL
Developing Bias PJ9A-7A
M-57
2nd Sleeve/Magnet Roller
ON OFF
L H
1075M068AA
1155T24MCA
WIRING DIAGRAM
D-12