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5-4 Functional Information
High-voltage Power Distribution
Figure 5-2 Engine Controller Board
In response to the instructions from the microprocessor (CPU:IC 501)
on the Engine Controller Board, this circuit applies the superimposed
voltage of DC voltage and AC voltage to the primary charging roller
and Developing Cylinder, and a positive or negative DC voltage to the
transfer charging roller.
According to the image density information sent from the Formatter,
this circuit varies the primary DC bias and developing DC bias to
adjust the image density.