HP Enterprise CC490A manual Multipurpose tray pickup, 36Multiple-feed prevention

The low friction force between the sheets weakens the driving force from the cassette feed roller. Therefore, the separation roller is driven by its own driving force and holds back any multiple-fed sheets from the cassette.

Figure 1-36Multiple-feed prevention

Cassette feed roller

	Cassette pickup roller
	Cassette separation roller
	follows the cassette feed roller
	Driving force from
Print-media	the pickup motor
	Cassette separation roller

Normal-feed

Multiple-feed

Multipurpose tray pickup

The product picks up one sheet of paper from the MP tray.

The sequence of steps for the multipurpose tray pickup operation as follows:

1.The pickup motor reverses when a print command is received from the formatter.

2.When the DC controller turns on the MP tray pickup solenoid, the MP tray pickup roller rotates and the lifting plate lifts.

3.As the lifting plate rises, the paper is picked up.

4.The multipurpose tray separation pad removes any multiple-fed sheets, and one sheet is fed into the product.

44 Chapter 1 Theory of operation ENWW