Xerox Phaser 7400 Service Manual

5-2 Phaser 7400 Color Printer Service Manual
Print-Quality Problems Overview
Print-quality defects can be attributed to printer components, consumables, media,
internal software, external software applications, and environmental conditions. To
successfully troubleshoot print-quality problems, eliminate as many variables as
possible. The first step is to generate prints using printable pages embedded in the
printer on paper from the Supported Media List. Use paper from an fresh, unopened
ream that is acclimated to room temperature and humidity.
See "Media and Tray Specifications" on page 1-18 or the Paper Tips page for media
that has been tested and approved for use in Phaser 7400 printers. If the
print-quality defect is still present when printing on approved media, then investigate
software applications and environmental conditions.
Print the Status or Configuration page to determine the temperature and humidity
under which the printer is operating. Compare this to the
"Environmental
Specifications" on page 1-17. Temperature and humidity extremes can adversely
effect the xerographic and fusing characteristics of the printer.
Phaser 7400 printers use separate Imaging Units to develop a latent image for each
color where the colors are combined on the Transfer Unit to form the final image. In
most cases, print-quality defects are the result of one particular component in the print
engine, See the Repeating Defects chart or print the Repeating Defects page from the
Control Panel. When a single component of the Imaging Unit is causing a print-
quality defect, replace the Imaging Unit.
When analyzing a print-quality defect, first determine if the defect occurs in all colors
or only one color and if it is repeating or random. Continuous defects in the process
direction, such as voids and lines, are the most difficult to diagnose. Inspect the
visible surfaces of all rollers for obvious defects. If no defects are observed, replace
the Imaging Units, Transfer Unit, and Fuser one at a time until the defect is
eliminated.

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