Hci Lift-Up Operation; Hci Cassette Media-Presence Detection; Figure 1-56 Hci Lift-Up Operation - HP LaserJet Enterprise 700 M712 series Handbuch Zur Fehlerbehebung

HCI lift-up operation

The HCI lifts up the tray to keep the surface of the paper at the pickup position whenever the following
occurs:
The product is turned on
●
The cassette is installed
●
The paper stack surface lowers by pickup operation
●
Figure 1-56
HCI left cassette
media stack surface 2
sensor
The figure above illustrates the mechanism for the left cassette, but each HCI cassette has the same
mechanism.
The operational sequence of the lift-up is as follows:
1. The HCI cassette lifter motor rotates the pulley to reel the wire. Accordingly the tray moves up.
2. The HCI cassette lifter motor stops when the HCI cassette media stack surface 2 sensor detects the
paper surface.
3.
The HCI cassette lifter motor rotates again when the HCI cassette media stack surface 1 sensor
detects that the stack surface lowers during a print operation.
The HCI controller determines an HCI cassette lifter motor failure and notifies the formatter through the
DC controller when the HCI cassette media stack surface 2 sensor does not detect the paper surface
within a specified period from when the HCI cassette lifter motor starts rotating.

HCI cassette media-presence detection

The HCI controller detects whether the paper is loaded in the cassette by monitoring the HCI cassette
media out sensor.
The cassette media-presence detection is not performed during Sleep mode.
72 Chapter 1 Theory of operation
HCI lift-up operation
Wire
PS3201
Tray
Pulley
HCI left cassette media stack surface 1 sensor
PS3202
M3303
HCI left cassette lifter motor
ENWW