Xerox Phaser 7400 Service Manual

Theory of Operation 2-25
Toner Full State
When the Imaging Unit is at a toner full state, the Agitation Bar target remains at its
maximum height for a period exceeding .85 seconds. Periods in excess of .85 seconds
indicate a toner full state. Periods below .85 seconds indicate at toner low state.
Toner Low State
As the toner supply is depleted at the Imaging Unit Drum, the period of time the
Agitation Bar remains at its lowest position increases reducing the amount of time the
target remains in the sensor’s range. This period of time (<.85 sec.) is monitored to
determine when a toner low condition exists.
Note
The time used to determine the amount of toner in the Imaging Unit varies with
print speed. The value of .85 seconds relates to a print speed of 37 ppm.
s7400-039
Agitation Bar
Target
Toner Full: 100g
Toner Low: 75g

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