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Functional Overview
: Engine Control Unit (ECU)/power system
43
High-voltage power distribution
The high-voltage power supply PCA applies an overlap of DC and AC voltage to the
primary charging roller and the developing roller. This circuit also applies a positive or
negative DC voltage to the transfer roller according to the instructions from the ECU.
This circuit also controls the image density by changing the primary AC voltage and
the developing AC bias according to the print density setting.
High voltage is disabled when the printer door is open.
Figure 3-3 High-voltage power supply circuit
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