Need help?Do you have a question about the HP LaserJet Pro 400 color M451 and is the answer not in the manual?
General| Print Technology | Laser |
|---|---|
| Print Resolution | 600 x 600 dpi |
| Standard Paper Capacity | 250 sheets |
| Operating Systems Supported | Windows, Mac, Linux |
| Processor speed | 800 MHz |
| Memory | 256 MB |
| Paper handling output, standard | 150-sheet output bin |
| Connectivity | USB, Ethernet |
| Paper handling input, standard | 250-sheet input tray |
| Media sizes supported | A4, Letter, Legal, Executive |
Describes the removal and replacement of field-replaceable units (FRUs). Notes and tips are included for difficult procedures.
Overview of the removal and replacement chapter, focusing on FRUs and general guidelines for service.
Procedures and precautions for handling ESD-sensitive parts to prevent damage.
Lists the specific tools needed for product disassembly and component replacement.
Details common fasteners and provides a guide to identifying and using the correct screws for reassembly.
Outlines the steps before, during, and after performing service, including post-service testing.
Provides diagrams showing the sequence for removing various parts and assemblies from the product.
Step-by-step instructions for removing and replacing specific components and assemblies.
Procedures for replacing rollers and pads, including specific instructions for the transfer roller.
Detailed steps for removing and replacing the engine and Tray 1 pickup rollers.
Instructions for removing and replacing the separation roller, including necessary precautions.
Steps for correctly reinstalling the separation roller and its cover.
Procedure for replacing the Tray 1 paper-pickup roller and its associated separation pad.
Details on removing major assemblies like the print-cartridge drawer and covers.
Instructions for removing the DIMM cover to access internal components.
Step-by-step guide for removing the right side cover of the product.
Procedure for correctly reinstalling the right cover, noting key alignment points.
Instructions for removing the rear-upper cover specifically for duplex models.
Procedure for removing the rear-door stopper and link caps on simplex models.
Detailed steps for removing the rear door assembly on simplex product versions.
Instructions for removing the rear door assembly on duplex product versions.
Procedure for removing the rear cover and feed guide on simplex models.
Steps for removing the rear-lower cover and associated rear-door links on duplex models.
Instructions for removing the rear-door rib assembly, including the duplex fan.
Information on the link guide component and when it might need replacement.
Step-by-step instructions for removing the main upper cover assembly.
Guidance on correctly reinstalling the upper cover, ensuring proper tab seating.
Procedure for removing the left side cover of the product.
Steps for correctly reinstalling the left cover, ensuring proper alignment.
Instructions for removing the right-front cover and the integrated power button.
Procedure for removing the paper-feed guide assembly, applicable to both simplex and duplex models.
Detailed steps for removing the control panel assembly, including connector and screw removal.
Instructions for removing the right panel, detailing connector and screw disconnections.
Step-by-step instructions for removing the front door assembly.
Procedure for removing the ITB, including necessary precautions for handling.
Verification steps after reinstalling the ITB, including printing a diagnostics page.
Instructions for removing either the drum motor (M1) or developer motor (M2).
Guidance for correctly reinstalling the motor wire harness retainer.
Steps for removing the intermediate PCA, including connector and screw removal.
Procedure for removing the formatter PCA, with special considerations for simultaneous replacement.
Steps for removing the DC controller PCA, with special considerations for simultaneous replacement.
Instructions for removing the fuser motor assembly, including screw and connector removal.
Procedure for removing the high-voltage power-supply PCA, including cover and screw removal.
Steps for removing the color-misregistration sensor assembly PCA.
Instructions for removing the product's internal fan.
Procedure for removing the duplex reverse-drive assembly.
Steps for removing the fuser, with warnings about its hot temperature.
Instructions for removing the paper-delivery assembly.
A checklist to help identify the cause of product problems before proceeding with troubleshooting.
Instructions on how to print a menu map of the control panel.
General approach to diagnosing and solving product malfunctions.
Questions to ask the customer to help define the problem's source.
Information on diagnostic tools and procedures, including engine tests and diagrams.
Diagrams showing the location of connectors on the DC controller PCA.
Diagrams identifying the major internal components of the product.
Diagrams and lists of solenoids, clutches, and sensors within the product.
Diagrams identifying various rollers within the product.
Diagrams identifying motors and fans within the product.
Diagrams identifying the various Printed Circuit Assemblies (PCAs) in the product.
Charts showing approximate timing in seconds for various product operations.
A comprehensive circuit diagram illustrating the product's electrical connections.
Detailed diagrams of the Central Processing Unit (CPU) and Application-Specific Integrated Circuit (ASIC).
Diagram illustrating the High Voltage Transformer (HVT) and Toner Electronic Magnetic Pulse (EMP) systems.
Diagram showing the connections and layout of the Driver PCA.
Diagram illustrating the Duplexer PCA and its connections.
Diagram related to the Fuser Sensor (FSR) functionality.
Procedures for printing internal test pages to diagnose print quality issues.
Methods for troubleshooting print quality issues, including repetitive image defects.
Overview of the control panel menus, including Reports and Quick Forms.
Settings related to system setup, including language, paper, and tray configurations.
Functions for restoring defaults, cleaning, and activating special modes.
Menu for service-related reports and special tests, not for customer access.
Procedures for restoring factory defaults and initializing NVRAM.
Information on the cold reset function and its equivalent in service menus.
Guidance on obtaining software and firmware updates for the product.
Common causes of jams and instructions for clearing jams in various locations.
Troubleshooting steps for issues like picking up multiple sheets or not picking up paper.
Guidance for diagnosing and resolving common image quality issues.
Procedures for cleaning the pickup/separation rollers and the paper path.
Troubleshooting steps for issues affecting print performance, such as slow printing.
Steps for troubleshooting direct-connect, network, and wireless connectivity issues.
Guidance for troubleshooting wireless connectivity issues.
Information on how to order parts, accessories, and supplies from HP.
List of service parts not shown in assembly illustrations.
Guidance on interpreting parts lists, diagrams, and identifying FRUs.
Diagrams and part numbers for product covers, panels, and doors.
Exploded view diagrams and parts lists for internal assemblies.
Diagrams and parts for internal assemblies, part 2 of 5.
Diagrams and parts for internal components, part 3 of 5.
Diagrams and parts for internal assemblies, part 4 of 5.
Diagrams and parts for internal assemblies, part 5 of 5.
Diagrams and parts lists specific to simplex models.
Diagrams and parts lists specific to duplex models.
Diagrams identifying the Printed Circuit Assemblies (PCAs) in the product.
Diagrams and parts for input devices, such as the paper feeder.
An alphabetical listing of all product parts, their numbers, and references.
A numerical listing of all product parts, their descriptions, and references.
Details the terms and conditions of the limited warranty for HP hardware and software.
Specific warranty terms for HP LaserJet print cartridges.
Information about the memory chip in HP print cartridges and data collection.
The legal terms and conditions governing the use of HP software.
Disclaimers and licensing information for the OpenSSL Toolkit software used in the product.
Information on how to obtain telephone and internet support from HP.
Instructions for properly repacking the product for shipping or return.
Dimensions and weight of the product for non-duplexing and duplexing models.
Information on power usage, electrical requirements, and sound emissions.
Recommended and allowed operating conditions for temperature, humidity, and altitude.
Compliance information with FCC rules for Class B digital devices and radio frequency exposure.
HP's commitment to environmental responsibility, including ozone production and paper use.
Information on chemical substances in products, including REACH compliance and MSDS.
Formal declaration of product conformity to ISO/IEC and EN standards.
Declaration of conformity for products with wireless functionality.
Statement regarding the volatility of customer data stored in memory and secure data erasure.
Important safety statements, including laser safety and power cord instructions.
Statements related to FCC compliance, Australia, Brazil, Canada, and EU/EFTA countries.
To Next Page
