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HP LaserJet 4000 User Manual

HP LaserJet 4000
377 pages
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HP LaserJet 4000, 4000 N,
4000 T, and 4000 TN Printers
Service Manual _____________

Table of Contents

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HP LaserJet 4000 Specifications

General IconGeneral
Print TechnologyLaser
Print SpeedUp to 17 ppm
Output Capacity250 sheets
Monthly Duty CycleUp to 65, 000 pages
ConnectivityParallel
Memory4 MB
Duplex PrintingOptional
Paper Capacity600 sheets
Supported Operating SystemsWindows 95, 98, NT 4.0, 2000, 3.1, DOS, OS/2, UNIX
Resolution1200 x 1200 dpi
Processor100 MHz

Summary

Service Manual

1 Printer Description

Overview

Introduces topics like printer features, identification, site requirements, paper specifications, and safety information.

Printer Features

Details specifications like speed, resolution, typefaces, memory, expansion slots, and interface.

Identification

Details on locating model and serial numbers on printer labels.

Site Requirements

Covers environmental and installation requirements for printer operation.

Paper Specifications

Details supported paper types, sizes, weight, and capacity for various trays.

Safety Information

Provides crucial safety warnings and information regarding laser, toner, and environmental compliance.

2 Service Approach

Overview

Introduces topics covered in the service approach chapter, including service approach, parts, and warranty.

Parts and Supplies

Guides users on where to find part numbers and how to order replacement parts and accessories.

Toner Cartridge Information

Discusses toner cartridge capacity, detection, and provides recommendations on refilled cartridges.

Warranty Statement

Outlines the specific legal rights and variations in warranty coverage across different regions.

3 Printer Operation

Overview

Covers essential operations of the printer, including control panel usage, menus, service mode, and configuration.

Using the Control Panel

Explains how to use the printer's control panel, including its layout, keys, lights, and settings.

Control Panel Menus

Details various control panel menus like Information, Paper Handling, Print Quality, Printing, Configuration, I/O, EIO, and Resets.

Service Mode

Describes how to enter and utilize service mode for advanced printer functions and diagnostics.

4 Printer Maintenance

Overview

Introduces the chapter on printer maintenance, covering cleaning and preventative maintenance.

Cleaning the Printer and Accessories

Provides instructions for cleaning the printer's exterior and interior parts, and paper handling accessories.

Preventative Maintenance

Details preventative maintenance cycles and explains how to reset the maintenance count.

5 Functional Information

Overview

Introduces the chapter on functional information, covering printer subsystems and operation sequence.

Printer Subsystems

Explains the function of key printer subsystems like power supply, engine controller, formatter, and paper feed.

Image Formation System

Describes the six stages of the image formation process, from cleaning to fusing.

Paper Feed System

Covers the paper path, sensors, clutches, and feeding mechanisms for various trays and feeders.

6 Removing and Replacing Parts

Overview

Introduces the chapter on removing and replacing parts, covering strategies and component removal.

Removal and Replacement Strategy

Details the procedure for printer disassembly and reassembly, emphasizing order and safety.

Removing Covers

Provides step-by-step instructions for removing various printer covers like the top, left, and right side covers.

Removing Assemblies

Details the removal process for major printer assemblies such as the fuser, formatter cage, and laser scanner.

7 Troubleshooting

Overview

Introduces the chapter on troubleshooting, covering processes, printing system, and reference diagrams.

Troubleshooting Process

Explains a systematic approach to diagnose printer malfunctions, starting with major problems.

Troubleshooting the Printing System

Covers preliminary checks, power on issues, display errors, event logs, printer messages, image quality, and interface problems.

General Paper Path Troubleshooting

Provides questions and checks to diagnose paper jam issues based on frequency and location.

8 Parts and Diagrams

Overview

Introduces the chapter on parts and diagrams, covering how to use lists and illustrations.

How To Use the Parts Lists and Diagrams

Explains how to interpret exploded view diagrams, part tables, and order replaceable parts.

Accessories and Supplies

Lists available accessories and supplies, such as paper feeders, duplexers, and toner cartridges, with part numbers.

Illustrations and Parts Lists

Presents assembly location diagrams and corresponding parts lists for major printer components.

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