Xerox Phaser 7400 Service Manual

Theory of Operation 2-3
Imaging Unit
The function of each Imaging Unit component is listed in the following table.
Imaging Unit Components
Component Function
Drum The Drum is an aluminum cylinder coated with a layer of photo-
conductive material that retains electrical charges on its surface
until exposed to light.
Bias Charge Roller (BCR) The BCR uniformly distributes electrical charges over the drum
surface, and erases the previous charge pattern.
Developer Roller A thin layer of developer and toner adheres to the surface of this
roller, which transports the toner to the Drum surface.
Sponge Roller Transfers toner to the Developer Roller.
Agitation Bar The Agitation Bar stirs the developer mixture to achieve a
uniform distribution of toner.
Cleaning Blade The Cleaning Blade removes toner remaining on the Drum.
Waste Toner Recovery Moves excess toner from the Imaging Unit to the Waste Toner
Recovery system for collection.
Toner Cartridge
Agitation Spring
Shutter
Agitation Bar
Target
s7400-022
Charge Roller
Drum
Developer Roller
Sponge Roller

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