Xerox Phaser 7400 Service Manual

Print-Quality Troubleshooting 5-9
3
Perform the Light and Darkness Color
Balance Procedure.
Did this correct the problem?
Complete. Go to Step 4.
4
Remove the Imaging Units and
Transfer Unit and check for toner
contamination on the high voltage
contacts.
Clean the contacts. Go to Step 5.
5
Are the LED Heads dirty?
Clean the heads with a clean, lint-free
cloth.
Did this correct the problem?
Complete. Go to Step 6.
6
Are the harnesses on the LED Heads
undamaged, properly routed and
seated?
Go to Step 7. Replace or reseat the
wiring harness.
7
Is +5 V supplied to each LED Head? Go to Step 9. Go to Step 8.
8
Is +5 V supplied to the POWER
connector on the Imaging Unit Sensor
Board?
Replace the
Imaging Unit Sensor
Board (
page 8-142).
Replace the LVPS
(
page 8-121).
9
Is +24 V supplied to the POWER
connector on the Engine Control
Board?
Go to Step 10. Replace the LVPS or
wiring harness.
10
Is +24 V supplied to the HVOLT
connector on the Engine Control
Board.
Go to Step 11. Replace the Engine
Control Board
(
page 8-112).
11
Inspect the high-voltage wiring
harness.
Replace defective
wiring harness.
Replace the Transfer
Unit. If the error
persists, replace the
HVPS (
page 8-119).
Troubleshooting Procedure Table (Continued)
Step Actions and Questions Yes No

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