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HP LaserJet 4250 User Manual

HP LaserJet 4250
540 pages
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HP LaserJet 4250 Specifications

General IconGeneral
Print TechnologyLaser
Print SpeedUp to 45 ppm
Print ResolutionUp to 1200 x 1200 dpi
Monthly Duty CycleUp to 200, 000 pages
Standard Input Capacity600 sheets
Standard Output Capacity300 sheets
Processor Speed400 MHz
Memory64 MB (expandable to 512 MB)
Media Sizes SupportedLetter, Legal, Executive
Supported Operating SystemsWindows, Mac

Summary

Product Information

HP LaserJet Printer Model Configurations

Details on available HP LaserJet printer models including base, n, tn, dtn, dtns, and dtnsl configurations.

Printer Model and Serial Numbers

Locating the model number and serial number on the printer's identification label.

HP LaserJet Printer Hardware Components

Identification of front and rear hardware components and interface ports.

HP LaserJet Printer Software and Drivers

Information on included drivers, optional software, and installation for various operating systems.

HP LaserJet Printer Technical Specifications

Details on hardware, electrical, acoustic, print speed, and operating environment specifications.

HP LaserJet Printer Media Handling Guidelines

Information on supported media, general guidelines, and specific media types to avoid.

HP LaserJet Warranty and Service Information

Details on Hewlett-Packard limited warranty, print cartridge warranty, and service approach.

HP LaserJet Regulatory and Safety Compliance

Overview of FCC regulations, environmental stewardship, and country/region-specific safety statements.

Installation

HP LaserJet Printer Operating Environment Requirements

Recommended temperature, humidity, and location guidelines for printer installation.

HP LaserJet Printer Installation Site Preparation

Guidelines for printer installation on suitable surfaces with adequate ventilation and power.

HP LaserJet Printer Software Installation

Information on installing and uninstalling the printing system software.

Operation

HP LaserJet Control Panel Operation

Guide to the control panel layout, lights, buttons, and using the printer Help system.

HP LaserJet Printer Settings Configuration

Managing temporary settings, control-panel defaults, and setting the display language.

HP LaserJet Control Panel Menu Navigation

Overview of available menus like Information, Paper Handling, and Diagnostics for printer functions.

Maintenance

HP LaserJet Printer Cleaning Procedures

Instructions for cleaning printer components, including the fuser, to maintain print quality.

HP LaserJet Preventive Maintenance

Guidance on replacing maintenance kit components and resetting the counter.

HP LaserJet Firmware Update

Procedures for updating printer firmware remotely using various methods.

Theory of Operation

HP LaserJet Printer Operating Systems

Overview of the printer's four main systems and the operating sequence from power-on to output.

HP LaserJet Laser Scanner System

Explanation of the laser/scanner assembly, its components, and latent image formation.

HP LaserJet Image Formation Process

Details on toner transfer from drum to media and fusing the image using heat and pressure.

HP LaserJet Paper Pickup and Feed System

Description of paper path, sensors, motors, and jam prevention mechanisms.

HP LaserJet Fuser and Delivery Block

Explanation of the fuser's role in image bonding and the output delivery assembly.

HP LaserJet Jam Detection

Overview of sensors used for detecting media presence and jams in the paper path.

Removing and replacing parts

HP LaserJet Part Removal and Replacement Strategy

General guidelines and required tools for printer part removal and replacement.

HP LaserJet User-Replaceable Parts

Instructions for replacing user-replaceable components like the print cartridge and transfer roller.

HP LaserJet Main Internal Assemblies

Diagrams and procedures for removing major internal printer assemblies.

Troubleshooting

HP LaserJet Troubleshooting Process Guide

Steps for diagnosing problems using checklists, flowcharts, and troubleshooting tools.

HP LaserJet Printer Resets and Power-On Modes

Procedures for cold reset, NVRAM initialization, and hard-disk initialization.

HP LaserJet Printer Test Pages

Instructions for printing engine-test and formatter test pages to verify functionality.

HP LaserJet Interface Troubleshooting

Diagnosing communication issues with parallel, EIO, and network connections.

HP LaserJet Control Panel Message Troubleshooting

Explanation and solutions for status, warning, error, and critical error messages.

HP LaserJet Paper Path Troubleshooting

Guidance on clearing jams, avoiding jams, and using paper-path tests.

HP LaserJet Image Quality Troubleshooting

Methods for diagnosing and resolving print quality issues like streaks, dots, and voids.

Parts and diagrams

Ordering HP LaserJet Parts and Supplies

Information on ordering replacement parts, consumables, and accessories from HP.

HP LaserJet Consumables and Accessories List

List of consumables (cartridges, kits) and accessories with product and service numbers.

HP LaserJet Internal Component Diagrams

Diagrams and part numbers for internal components like motors, sensors, and assemblies.

HP LaserJet Accessory Identification

Diagrams and part numbers for optional accessories like feeders and staplers.

HP LaserJet Parts List (Alphabetical)

An alphabetical listing of all printer parts with part numbers and their corresponding table and page.

HP LaserJet Parts List (Numerical)

A numerical listing of all printer parts with part numbers and their corresponding table and page.

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