Xerox Phaser 7400 Service Manual

Theory of Operation 2-57
Imaging Unit Sensor Board
The Imaging Unit Sensor Board communicates with the Engine Control Board and
supplies voltage for the two Imaging Unit Fans and Fuser Fan. The board also
includes the four Low Toner Sensors that monitor toner levels in the Imaging Units,
and the Imaging Unit Position sensor that detects the position of the Lift Uplink.
■ Low Toner Sensors [C][M][Y][K]
Detects level of toner in the Imaging Unit.
■ Toner Cartridge In Sensors [C][M][Y][K]
Detects the presence of the Toner Cartridge in the holder.
■ Lift Uplink Position Sensor
Detects the position of the Lift Uplink.
■ Imaging Unit Drum Phase Sensors
Detects the position of the Imaging Unit Drums.
Motor Driver Board
Located directly below the Imaging Unit motors, the Motor Driver Board receives
+24 V from the LVPS and distributes power and control signals to these devices:
■ Imaging Unit Motors
■ Toner Motors
■ Waste Toner Motor
■ Fuser Motor
■ Tray 2 Paper Size Switches
Feeder Board
The Feeder Board communicates with the Motor Diver Board and provides
connections for these components:
■ Registration Clutch #2
■ Registration Sensor #2
■ Feed-Out Sensor #2
■ Tray 2 No Paper Sensor
■ Door B Interlock.
Integrated on the board are the Tray 2 Level Sensor and Tray 2 Low Paper Sensor.

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