Xerox Phaser 7400 Service Manual

Print-Quality Troubleshooting 5-21
Random Spots
There are spots of toner randomly scattered across the page. Toner melting off the
Fuser thermistors can also place random spots onto prints.
Initial Actions
■ Verify the Imaging Unit, Fuser, and Transfer Unit are not at or near end of
life. Waste toner, especially from the Transfer Unit, can cause random spots
to appear on the page.
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.
Troubleshooting Reference Table
Applicable Parts Example Print
■ Imaging Unit
■ Fuser
■ Transfer Roller
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1
Is there toner spilled inside the
printer?
Vacuum inside the
printer and remove
all visible toner.
Go to Step 2.
2
Check the media for spots or
contamination that exists prior to
printing.
Try printing on a different media, not a
glossy media.
Replace with fresh
paper.
Go to Step 3.
s7400-328

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