User Guide

Introduction
In order to use the information in this chapter, you should have a basic understanding of the laserjet
printing process. Explanations of each mechanical assembly, the printer systems, and the basic
theory of operation are contained in chapter 5 of this manual. Do not perform any of these
troubleshooting processes unless you understand the function of each printer component.
This chapter contains the following sections:
■ Troubleshooting process This section includes an initial troubleshooting checklist and a
troubleshooting flowchart. These contain information about common printer errors that can inhibit
operation or create print-quality problems. They also include recommendations for resolving the
cause of the problem. See
Troubleshooting process.
■ Troubleshooting tools This section contains information that helps to isolate the cause of
printer failures. This section contains information about printing information and test pages,
resetting printer options, using the diagnostics and service menus, and using the embedded Web
server. See
Troubleshooting tools.
■ Interface troubleshooting This section provides techniques for isolating the source of
communication problems to the printer hardware, the printer configuration, the network
configuration, or the software program. See
Interface troubleshooting.
■ Display-message troubleshooting This section explains each control-panel-display message
and suggests recommendations for resolving the cause of each message. When the printer
message indicates a failure for which the root cause is not obvious, use the troubleshooting
process section and the troubleshooting tools section in this chapter to solve the problem. See
Display-message troubleshooting.
■ Paper-path troubleshooting This section provides information to help solve feed problems,
including print media checks, jam troubleshooting checks, and information about media-caused
and printer-caused jams. See
Paper-path troubleshooting.
■ Image-formation troubleshooting This section explains methods for solving print-quality
problems. See
Image-formation troubleshooting.
■ Stacker and stapler/stacker troubleshooting This section provides information about solving
stacker and stapler/stacker problems. See
Troubleshooting the stacker and the stapler/stacker.
■ Printer and accessory components This section contains illustrations and tables that list the
printer and accessory internal components. See
Printer-component locations and Accessory
component locations.
■ Printer and accessory wiring diagrams This section contains wiring diagrams for the printers
and accessories. See
Printer and accessory wiring diagrams.
■ General timing diagrams This section contains timing diagrams for the printer. See
General
timing diagrams.
302 7 Troubleshooting