Xerox Phaser 7400 Service Manual

Print-Quality Troubleshooting 5-23
Background Contamination
There is a very light covering of toner across the entire page. Background
contamination can appear in one of the primary colors or gray. The printer displays no
error code.
Note
Depending on the type of paper and environmental conditions, some light amount
of random background spotting is normal. The whiter and glossier the paper, the
more noticeable it will be.
Initial Actions:
■ Ensure the TekColor correction is not set to None in the printer’s dialog box.
■ Ask the customer about their typical printing habits. A high daily duty cycle
can temporarily fatigue the OPC drums within the Imaging Unit and
contribute to unwanted background toner.
Troubleshooting Reference Table
Applicable Parts Example Print
■ Imaging Unit
■ Fuser
■ Transfer Unit
■ HVPS
■ Engine Control Board
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1
Is the printer in direct sun light? Move the printer. Go to Step 2.
2
Does the background appear to be in
only one of the primary colors?
Go to Step 3. Go to Step 4.
s7400-324

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