Printhead Replacement Kit HP 739 for DesignJet (MPN 498N0A)

The HP 739 printhead replacement kit for DesignJet is a set of compatible printhead components designed to restore printing performance in supported large-format HP DesignJet printers. The kit provides the parts required to replace worn or failed printheads, helping to recover accurate ink deposition, consistent color output and printhead alignment for technical or production printing environments. It is intended for use by service technicians or trained in-house personnel performing maintenance on DesignJet series devices.

Advantages

This printhead replacement kit restores precise droplet placement and helps eliminate common defects such as banding, streaks and color shifts caused by degraded nozzles. Using a dedicated replacement kit reduces downtime by providing the specific components engineered to match the printer's requirements. The kit supports consistent color and line accuracy important for CAD drawings, maps and high-resolution graphics, and contributes to predictable print quality after maintenance.

Suitable for

• Restoring print quality in HP DesignJet large-format printers
• Scheduled maintenance and printhead replacement by service personnel
• Repairing printers that show banding, missing nozzles or color inconsistencies
• Production environments requiring reliable, repeatable output

Key specifications

• Function: replacement printhead components for HP DesignJet printers
• Compatibility: designed for specified HP DesignJet large-format models (refer to service documentation for exact model list)
• Intended use: restores ink deposition accuracy and nozzle performance
• Packaging: service kit containing the printhead components and any required mounting parts

How to use

Power down the printer and follow the manufacturer's service manual or official maintenance instructions when replacing the printhead. Remove the defective printhead assembly according to the printer's procedure, install the replacement components from the kit, and perform the required alignment and nozzle checks using the printer's service utilities. After installation, run printhead cleaning and calibration routines to confirm correct operation and verify print quality.

Recommendations

Use this kit only with compatible HP DesignJet models and follow HP's safety and service guidelines. Replace printheads in a controlled environment to avoid contamination, and handle components by designated contact points to prevent damage. Confirm compatibility in service documentation before installation and consider replacing related consumables if print quality issues persist.