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HP LASERJET PRO 400 User Manual

HP LASERJET PRO 400
346 pages
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LASERJET PRO 300 COLOR MFP
LASERJET PRO 400 COLOR MFP
Service Manual
M375
M475

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HP LASERJET PRO 400 Specifications

General IconGeneral
Operating Systems SupportedLinux
Operating System CompatibilityWindows 11; Windows 10; Windows 7; Windows Client OS; Android; iOS; macOS 10.15 Catalina; macOS 11 Big Sur; macOS 12 Monterey; macOS 13 Ventura; Linux; ChromeOS
Software IncludedHP Smart app
Mobile PrintingApple AirPrint
Security Features[Dynamic security enabled printer] Only intended to be used with cartridges using an HP original chip. Cartridges using a non-HP chip may not work, and those that work today may not work in the future.

Summary

Removal and Replacement

Removal and Replacement Strategy

Overview of procedures for removing and replacing field replaceable units (FRUs).

Electrostatic Discharge (ESD)

Precautions for handling parts sensitive to electrostatic discharge (ESD).

Post-Service Tests

Tests to verify repair or replacement success.

Removal and Replacement Procedures

Detailed steps for removing and replacing various product components.

Main Assemblies

Intermediate Transfer Belt (ITB)

Procedure for removing the intermediate transfer belt (ITB).

Reinstall the ITB

Procedure to verify correct reinstallation of the ITB.

Formatter PCA and Fax PCA

Procedure for replacing formatter PCA before DC controller PCA.

DC Controller PCA

Procedure for replacing the DC controller PCA before the formatter PCA.

Fuser-Motor Assembly

Procedure for removing the fuser-motor assembly.

Reinstall the Fuser-Motor Assembly

Procedure for reinstalling the fuser-motor assembly.

Fuser

Information about removing the fuser.

Remove the Fuser

Detailed steps for removing the fuser.

Reinstall the Fuser

Procedure for reinstalling the fuser.

Solve Problems

Solve Problems Checklist

Checklist to identify the cause of product problems.

Troubleshooting Process

General steps and considerations for troubleshooting product malfunctions.

Pretroubleshooting Checklist

Basic questions to ask the customer to help define the problem.

Location of Major Components

Diagrams and lists identifying major internal components of the product.

Internal Print Quality Test Pages

Procedures for printing internal test pages to assess print quality.

Print Quality Troubleshooting Page

Using the print quality page to help solve print quality problems.

Clean the Paper Path

Procedure to clean the paper path using the cleaning mode.

Clean the Scanner Glass Strip and Platen

Procedure to clean the scanner glass and white plastic backing.

Clean the Document Feeder Pickup Rollers and Separation Pad

Procedure to clean document feeder rollers and separation pad.

Solve Performance Problems

Troubleshooting tips for issues affecting print performance.

The Product Does Not Print

Troubleshooting steps when the product does not print at all.

The Product Prints Slowly

Troubleshooting steps when the product prints slowly.

Solve Product Connectivity Problems

Troubleshooting steps for connectivity issues.

Solve Wireless Network Problems

Troubleshooting steps for wireless network connectivity issues.

Service Mode Functions

Overview of functions available in the Service menu.

Product Resets

Procedures for restoring factory default settings and NVRAM initialization.

Solve Fax Problems

Troubleshooting steps for common fax-related issues.

Fax Troubleshooting Checklist

A checklist to help diagnose and resolve fax problems.

Fax Error Messages

Descriptions and recommended actions for various fax error messages.

Troubleshoot Fax Codes and Trace Reports

How to view and interpret fax error codes and trace reports.

Solve Problems Sending Faxes

Troubleshooting steps for issues when sending faxes.

Solve Problems Receiving Faxes

Troubleshooting steps for issues when receiving faxes.

Parts and Diagrams

Appendix A Service and Support

Hewlett-Packard Limited Warranty Statement

Details the limited warranty for HP hardware and software products.

Customer Support

Contact information and resources for customer support.

Appendix C Regulatory Information

FCC Regulations

Compliance information regarding FCC rules for Class B digital devices.

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