Xerox Phaser 7400 Service Manual

2-12 Phaser 7400 Color Printer Service Manual
To avoid a positional shift between the different color images, the color registration
control generates an alignment pattern (a series of primary color toner patches on
either side of the Transfer Unit belt.
Color registration control is outlined below:
1. With no toner on the Transfer Unit, the output value of the Color Registration
Sensors is measured to determine the reference value.
2. Patches for color registration control are generated on the edges of the Transfer
Unit belt.
3. A solenoid-activated Registration Shutter opens so the sensors are exposed to the
toner patches on the Transfer Unit belt.
4. The position of the patches generated is measured by the Color Registration
Sensors.
5. The amount of registration shift is calculated from the reference value
determined in Step 1, and the patch alignment measured in Step 4.
6. The image write timing is changed to compensate for any registration shift.
Color registration is checked when the power is turned On, a cover is closed, the
printer is idle for more than 2 hours, or after printing 400 sheets.
Color or Check Pattern
Color Registration Sensor Front
Color Registration Sensor Rear
s7400-623

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