Xerox Phaser 7400 Service Manual

Theory of Operation 2-7
1. Charging: The charge roller (RTC) is negatively charged by the High-Voltage
Power Supply (HVPS) and is kept in contact with the drum surface to provide a
uniform negative charge on the drum as it rotates at a constant speed. This occurs
simultaneously for CMYK.
2. Exposure: The Light Emitting Diode (LED) Head emits light to the negatively
charged surface of the drum. Areas of the drum surface receiving the light
attenuate the negative charge based on light intensity and surface potentials,
forming the latent electrostatic image on the drum surface. This occurs
simultaneously for CMYK.
3. Development: The Developer Roller applies toner to the latent image formed
on the surface of the drum. Toner transfer occurs as follows:.
■ The sponge roller transfers toner to the Developer Roller. The toner is
negatively charged.
■ The toner cleaning blade removes excess toner on the Developer Roller to
form a thin film of toner on the surface of the Developer Roller.
HVPS
Charge Roller
Drum
s7400-018
HVPS
Charge
Roller
LED Head
Paper
Drum
Drum
LED Head
s7400-017

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