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HP LaserJet Enterprise - Install the memory DIMM

Introduction

This document provides the procedures to remove and replace the memory dual-inline memory module (DIMM).
Before servicing
  • Use the table below to identify the correct kit part number for your product, and then go to www.hp.com/buy/parts to order the kit.
    DIMM kit part number
    B3G85-67909
    2GB memory DIMM kit with instruction guide
Required tools
  • No special tools are required to install this kit.
  caution:
This product contains components that can be damaged by electrostatic discharge (ESD). To reduce the chance of ESD damage, place the product on an ESD mat (if available), and wear an ESD wrist strap connected to a grounded surface. If an ESD workstation or mat is not available, ground yourself by touching the sheet-metal chassis before touching an ESD-sensitive part.

Step 1: Remove the formatter

  1. Do the following steps:
    1. Turn off the product.
    2. Disconnect the power cable.
        warning:
      To avoid damage to the product, turn the product off, wait 30 seconds, and then remove the power cord before attempting to service the product.
    3. Disconnect all cables and accessories attached to the formatter.
  2. Loosen the two thumbscrews on the formatter.
    Figure : Remove the formatter
  3. Slide the formatter straight out of the product to remove it.
    Figure : Remove the formatter

Step 2: Remove the old memory DIMM

  caution:
ESD sensitive assembly.
  1. Release two clips.
    Figure : Release two clips
  2. Rotate the DIMM upward (callout 1), and then remove it (callout 2).
    Figure : Remove the DIMM

Step 3: Unpack the replacement DIMM

Unpack the replacement assembly from the packaging.
  caution:
ESD sensitive assembly.
note:
HP recommends responsible disposal of the defective assembly.
Figure : Recycle and unpack illustration

Step 4: Install the new memory DIMM

  caution:
ESD sensitive assembly.
  1. Carefully insert the DIMM at an angle into the holder on the formatter.
    note:
    Position the DIMM so that the slot in the DIMM is aligned with the tab in the holder.
    Figure : Insert the DIMM into the holder
  2. Rotate the DIMM in the direction of the arrow to install it.
    Figure : Install the DIMM
  3. When the DIMM is installed make sure that the retaining clips on the right and left sides of the DIMM snap into place.
    Figure : Make sure that the retaining clips snap into place

Step 5: Install the formatter

  caution:
ESD sensitive assembly.
  1. Align the formatter with the guides at the top and bottom of the formatter cage and push the formatter into the slot until it is fully seated.
    Figure : Align the formatter with the guides and push the formatter into the slot
  2. Finger-tighten the two thumbscrews.
    Figure : Tighten the two thumbscrews

Step 6: Test the installation

  1. Do the following steps:
    1. Reconnect all cables to the formatter.
    2. Plug in the power cord.
  2. Turn on the product.
    note:
    If the product does not initialize when the power is turned on, make sure that the memory DIMM is correctly installed.
    To verify that the formatter is correctly installed, observe the following functions of the LEDs on the formatter:
    • The heartbeat LED (callout 1) illuminates if the formatter is functioning correctly.
      • While the product is initializing, the heartbeat LED illuminates solid red for about one second, and then turns solid green for about twenty seconds.
      • After the initialization sequence is complete, the heartbeat LED blinks continuously if the printer is functioning correctly.
    • The connectivity LED (callout 2) indicates that the formatter is completely seated. It illuminates green when the product power is turned on and stays green if the formatter is properly seated.
    If the LEDs do not correctly function, turn the product power off, remove the formatter, and then reinstall it (make sure that the formatter is fully seated before tightening the thumbscrews).
    Figure : Verify that the formatter is functioning

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