Xerox DocuPrint 180 NPS Series User manual

Xerox DocuPrint Network Printer Series
Troubleshooting Guide
for Models 96/4635/180 NPS
Version 7.1
August 2000
721P86651

Xerox Corporation
701 S. Aviation Boulevard
El Segundo, CA 90245
©1997, 1998, 1999, 2000 by Xerox Corporation. All rights reserved.
Copyright protection claimed includes all forms and matters of
copyrightable material and information now allowed by statutory or
judicial law or hereinafter granted, including without limitation,
material generated from the software programs which are displayed
on the screen, such as icons, screen displays, looks, etc.
Printed in the United States of America.
Publication number: 721P86651
Xerox® and all Xerox products mentioned in this publication are
trademarks of Xerox Corporation. Products and trademarks of other
companies are also acknowledged.
Changes are periodically made to this document. Changes, technical
inaccuracies, and typographic errors will be corrected in subsequent
editions.

XEROX DOCUPRINT 96/4635/180 NPS TROUBLESHOOTING GUIDE iii
Laser safety
!Warning: Adjustments, use of controls, or performance of
procedures other than those specified herein may result in
hazardous light exposure.
The Xerox DocuPrint printers are certified to comply with the
performance standards of the U.S. Department of Health, Education,
and Welfare for Class 1 laser products. Class 1 laser products do not
emit hazardous radiation. The DocuPrint printers do not emit
hazardous radiation because the laser beam is completely enclosed
during all modes of customer operation.
The laser danger labels on the system are for Xerox service
representatives and are on or near panels or shields that must be
removed with a tool. DO NOT REMOVE LABELED PANELS OR
PANELS NEAR LABELS. ONLY XEROX SERVICE
REPRESENTATIVES HAVE ACCESS TO THESE PANELS.
Ozone information
This product produces ozone during normal operation. The amount
of ozone produced depends on copy volume. Ozone is heavier than
air. The environmental parameters specified in the Xerox installation
instructions ensure that concentration levels are within safe limits. If
you need additional information concerning ozone, call 1-800-828-
6571 to request the Xerox publication 600P83222, OZONE.
Operation safety
Your Xerox equipment and supplies have been designed and tested
to meet strict safety requirements. They have been approved by
safety agencies, and they comply with environmental standards.
Please observe the following precautions to ensure your continued
safety.
•Always connect equipment to a properly grounded electrical
outlet. If in doubt, have the outlet checked by a qualified
electrician.
!Warning: Improper connection of the equipment grounding
conductor may result in risk of electrical shock.
•Never use a ground adapter plug to connect equipment to an
electrical outlet that lacks a ground connection terminal.
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iv XEROX DOCUPRINT 96/4635/180 NPS TROUBLESHOOTING GUIDE
•Always place equipment on a solid support surface with
adequate strength for its weight.
•Always use materials and supplies specifically designed for
your Xerox equipment. Use of unsuitable materials may result in
poor performance and may create a hazardous situation.
•Never move either the printer or the Printer Controller without
first contacting Xerox for approval.
•Never attempt any maintenance that is not specifically
described in this documentation.
•Never remove any covers or guards that are fastened with
screws. There are no operator-serviceable areas within these
covers.
•Never override electrical or mechanical interlocks.
•Never use supplies or cleaning materials for other than their
intended purposes. Keep all materials out of the reach of
children.
•Never operate the equipment if you notice unusual noises or
odors. Disconnect the power cord from the electrical outlet and
call service to correct the problem.
If you need any additional safety information concerning the
equipment or materials Xerox supplies, call Xerox Product Safety at
the following toll-free number in the United States:
1-800-828-6571
For customers outside the United States, contact your local Xerox
operating company.

XEROX DOCUPRINT 96/4635/180 NPS TROUBLESHOOTING GUIDE v
Table of contents
Laser safety iii
Ozone information iii
Operation safety iii
Introduction vii
About this guide vii
Contents vii
Conventions viii
Related publications ix
1. Calling for service 1-1
Information to have on hand when calling for service 1-1
Enabling and disabling the modem for remote service 1-2
2. Fault masking 2-1
3. Troubleshooting Xerox Client Software installation 3-1
4. Troubleshooting a Novell implementation 4-1
5. Clearing paper misfeeds and jams 5-1
Clearing a feeder tray fault 5-1
Frequent misfeeds 5-3
Clearing paper jams 5-4
Checking job integrity following a paper jam 5-5
Printer areas 5-6
Clearing bypass transport paper jams 5-16
Paper curl and paper jams 5-18
Measuring the paper curl 5-18
Adjusting the decurler lever 5-19
6. Using sample documents 6-1
Listing and printing sample documents 6-1
List Sample Documents 6-1
Print Sample Document 6-2
7. Adjusting print quality and speed 7-1
Installing the custom transfer assist blade 7-1
Correcting skewed printing 7-2
Measuring performance 7-4

TABLE OF CONTENTS
vi XEROX DOCUPRINT 96/4635/180 NPS TROUBLESHOOTING GUIDE
Calculating throughput 7-5
Minimizing the start-up latency 7-7
300 dpi versus 600 dpi performance 7-9
Setting page order 7-10
Product features that affect print quality 7-10
Proprietary PostScript extensions 7-10
Device-dependent operators 7-11
Gray shading—setscreen and setcolorscreen 7-11
Gray shading—settransfer and transfer function 7-11
Smooth curves—setflat 7-12
Invisible strokes—0 setlinewidth 7-12
Scan conversion—fill, eofill, and stroke 7-12
8. Correcting stacking problems 8-1
9. System unresponsive 9-1
Index INDEX-1

XEROX DOCUPRINT 96/4635/180 NPS TROUBLESHOOTING GUIDE vii
Introduction
This Xerox DocuPrint Network Printer Series Troubleshooting Guide
describes how to solve some specific problems that may occur when
you are using the Xerox DocuPrint 96, 4635, or 180 Network Printing
System (NPS).
About this guide
This guide is designed for Xerox DocuPrint 96/4635/180 NPS
operators whose job consists of the routine operation of one of these
systems.
Users should have an understanding of Printer Controller operations.
Before using this guide, become familiar with its contents and
conventions.
Contents
This section lists the contents of this guide:
•Chapter 1, “Calling for service,”describes the information to
have on hand when calling for support service.
•Chapter 2, “Fault masking,”describes how the Model 96/4635/
180 NPS masks a problem so that the job will continue to print.
•Chapter 3, “Troubleshooting Xerox Client Software installation,”
provides solutions to common problems with software
installation.
•Chapter 4, “Troubleshooting a Novell implementation,”
describes some ways to troubleshoot a Novell implementation
by viewing log messages.
•Chapter 5, “Clearing paper misfeeds and jams,”illustrates how
to clear paper misfeeds and jams from various parts of the
paper path.
•Chapter 6, “Using sample documents,”describes how you can
print sample documents to test the printing capability of your
system.
•Chapter 7, “Adjusting print quality and speed,”provides various
methods for optimizing print quality and speed.
•Chapter 8, “Correcting stacker problems,”provides solutions to
common stacker problems.
•Chapter 9, “System unresponsive,”provides solutions to
specific printer problems.

INTRODUCTION
viii XEROX DOCUPRINT 96/4635/180 NPS TROUBLESHOOTING GUIDE
Conventions
This guide uses the following conventions:
•All caps and angle brackets—Within procedures, the names of
keys are shown in all caps within angle brackets (for example,
press <RETURN>).
•Angle brackets—Variable information, or the position of a
specified argument in the command syntax, appears in angle
brackets (for example, List Fonts <Pattern>).
•Bold—Within procedures, text and numbers that you enter are
shown in bold (for example, enter privilege operator).
•“Enter”—Within procedures, the two-step process of keying in
data and pressing <RETURN> (for example, enter y).
•Italics—Document and library names are shown in italics (for
example, the Xerox DocuPrint Network Printer Series
Troubleshooting Guide).
•Quotes—Keywords you can enter as arguments appear in
quotes (for example, “USLetter”).
•Vertical bars—Alternatives to specified arguments are
separated by vertical bars (for example, Set Time <Time |
Remote Host Name | IP Address>).
Note: Notes are hints that help you perform a task or understand
the text.
Caution: Cautions alert you to an action that could damage
hardware or software.
!Warning: Warnings alert you to conditions that may affect the
safety of people.
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INTRODUCTION
XEROX DOCUPRINT 96/4635/180 NPS TROUBLESHOOTING GUIDE ix
Related publications
The Xerox DocuPrint Network Printer Series includes the following
documents:
Decomposition Service and Tools Guide
Guide to Configuring and Managing the System
Guide to Managing Print Jobs
Guide to Performing Routine Maintenance
Guide to Submitting Jobs from the Client
Guide to Using Page Description Language
Installation Planning Guide
Messages Guide
System Overview Guide
Troubleshooting Guide
Glossary
Master Index
Customer Information Quick Reference Card
Printer Controller Commands Quick Reference Card
Submitting your Jobs from Macintosh Quick Reference Card
Submitting your Jobs from UNIX & DOS Quick Reference Card
Submitting your Jobs from Windows NT 4.0 (QuickPrint) Quick
Reference Card
Submitting your Jobs Using Windows NT 4.0 Drivers Quick
Reference Card
The documentation set also includes an electronic version, the
DocuPrint NPS Interactive Customer Documentation CD.

INTRODUCTION
x XEROX DOCUPRINT 96/4635/180 NPS TROUBLESHOOTING GUIDE