Xerox Phaser 7400 Service Manual

Theory of Operation 2-29
The Tray 1 (MPT) Lift Plate should remain down (home position) when opened. It
should only lift when media is sensed. However, the Tray 1 (MPT) Lift Plate is spring
loaded. These springs are compressed under the Lift Plate by the Lift Arms driven by
the Registration Motor.
When you open Door A, the Lift Arm gear train is disengaged from the Registration
Motor and the springs are free to raise the Lift Plate. This becomes important when
servicing Tray 1 (MPT) as the Lift Arms can be trapped underneath the Lift Plate.
When the printer's on, closing the Tray 1 (MPT) and then reopening it returns the Lift
Plate to home position. When the printer's off, to return the Lift Plate to home
position, close the Tray 1 (MPT) and Door A. Next, open Door A with the Tray 1
(MPT) closed. Now, when Tray 1 (MPT) is opened, it should be back to its home
position.
Components of Tray 1 (MPT) include:
■ No Paper Sensor
Detects presence or absence of print media in the tray.
■ Home Position Sensor
Detects the position of the lift arm. When the lift arm is down, the lift plate is at
Home Position.
■ Level Sensor
Detects the leading edge of the media based on the position of the Actuator.
■ Registration Clutch #1
This clutch transfers Registration Motor drive to the lift arms.
■ Feed-Out Sensor #1
Detects the leading edge as the media leaves the Feed Rollers.
■ Registration Roller #1
This roller assembly aligns the leading edge of the sheet to correct any skew.
■ Registration Sensor #1
These sensors detect the presence of media as it arrives at the Registration
Rollers.
■ Transfer Unit Entrance Sensor
Detects the media as it leaves the Registration Roller #1.

Xerox Phaser 7400 Specifications

General

Color	Yes
Print technology	Laser
Maximum resolution	600 x 1200 DPI
Time to first page (black, normal)	12 s
Print speed (black, normal quality, A4/US Letter)	40 ppm
Print speed (color, normal quality, A4/US Letter)	36 ppm
Storage media	HDD
Internal memory	512 MB
Processor model	PowerPC
Maximum internal memory	1 MB
Internal storage capacity	20 GB
Total input capacity	800 sheets
Maximum input capacity	3000 sheets
Paper tray 2 input capacity	350 sheets
Auto document feeder (ADF) input capacity	1650 sheets
Maximum print size	297 x 420 mm
Paper tray media types	Envelopes, Labels, Transparencies
Non-ISO print media sizes	Executive (184 x 267mm), Folio (media size), Letter (media size), Statement (140 x 216mm), Legal (media size)
Maximum ISO A-series paper size	A3
Power requirements	100-240V, 50/60Hz
Networking features	Fast Ethernet
Supported media weight(s)	270 g/m²
Maximum operating temperature range (T-T)	10 - 32 °C
Certification	FCC p.15 A, CE
Storage temperature (T-T)	-20 - 60 °C
Operating temperature (T-T)	-4 - 140 °F
Storage relative humidity (H-H)	10 - 95 %
Operating relative humidity (H-H)	20 - 80 %
Maximum duty cycle	150000 pages per month

Weight and Dimensions

Dimensions (WxDxH)	1438 x 623 x 975 mm