Xerox Phaser 7400 Service Manual

Print-Quality Troubleshooting 5-35
Scan Direction Bands, Voids, or Streaks
There are areas of the image that are extremely light or are missing entirely. The
missing areas form bands that run along the page from the leading edge to the trailing
edge in the direction of paper travel.
Troubleshooting Reference Table
Applicable Parts Example Print
■ Imaging Unit
■ Transfer Unit belt
■ LED Heads
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1
Print the 100% Solid Fill test print.
Are the missing bands in the process
direction?
Go to Step 2. See "Process Direction
Bands, Voids, or
Streaks" on page 5-34
2
Are there any obstructions, dirt or
debris in the printer’s paper path?
Clean or remove
obstructions.
Go to Step 3.
3
Clean the LED Heads with at dry, lint-
free cloth.
Did this fix the problem?
Complete. Go to Step 4.
4
Remove the each Toner Cartridge
and check for toner starvation within
the Imaging Unit(s).
Replace the Toner
Cartridge.
Go to Step 5.
5
Swap the LED Head of the problem
color with any other LED Head.
Print a Solid Fill Test Pattern.
Has the problem moved with the LED
Head?
Replace the
defective LED Head
(
page 8-125).
Go to Step 6.
s7400-333
Scan
Process

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