HP Enterprise CC490A manual Biases for each color

Table 1-7High-voltage power supply circuits (continued)

Circuit	Description
Primary-transfer-bias generation	The primary transfer bias transfers the toner from each photosensitive drum onto
	the ITB. The primary transfer bias circuit in the high-voltage power supply generates
	the biases for each color.
Secondary-transfer-bias generation	The secondary transfer bias transfers the toner image from the ITB onto the paper.
	The secondary transfer bias circuit in the high-voltage power supply generates the
	bias. The reversed bias transfers residual toner on the secondary transfer roller back
	to the ITB. The residual toner on the ITB is deposited in the toner collection box.

ENWW Engine-control system 11