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Replacing the Printhead for HP Officejet Pro K850 Color Printer Series

Introduction

This document provides information on how to replace a printhead.

A printhead might need replacing when print quality issues cannot be resolved by cleaning the printheads, or when the Power light is on, and the Printhead light and one or more of the color indicator lights blink.

Figure 1: Power light is on, and the Printhead light and one or more of the color indicator lights blink.

Replace the printheads

Use the following instructions to replace the printheads in your printer.

  1. Open the top cover.

  2. Lift the printhead latch.

    Figure 2: Lifting the printhead latch

  3. Lift the handle of a printhead. Use the handle to pull the printhead out of the slot.

    Figure 3: Lifting the handle

  4. Remove the new printhead from the package, and then remove the protective caps.

    Figure 4: Removing protective caps

  5. Insert the printhead into the color-coded slot. Press down firmly on the printhead to ensure proper contact.

    Figure 5: Inserting printhead

  6. Pull the printhead latch all the way forward, and then press down to ensure that the latch is properly engaged. You might have to apply some pressure to engage the latch.

    Figure 6: Closing the printhead latch

  7. Close the top cover.

  8. Wait while the printer initializes the printheads and prints the alignment pages.

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