3
Precautions When Removing, Installing, or Storing CRUs 3-7
Servicing and Upgrading a DPE
•Before touching any CRU, touch a bare (unpainted) metal surface
of the enclosure.
•Before removing any CRU from its antistatic bag, place one hand
firmly on a bare metal surface of the enclosure, and at the same
time, pick up the CRU while it is still sealed in the antistatic bag.
Once you have done this, do not move around the room or contact
other furnishings, personnel, or surfaces until you have installed
the CRU.
•When you remove a CRU from the antistatic bag, a void touching
any electronic components and circuits on it.
•If you must move around the room or touch other surfaces before
installing a CRU, first place the CRU back in the antistatic bag.
When you are ready again to install the CRU, repeat these
procedures.
Precautions When Removing, Installing, or Storing CRUs
Use the precautions listed below when you remove, handle, or store
CRUs.
•Do not remove a faulty CRU until you have a replacement
available.
•Handle a CRU only when using an ESD wristband as follows:
attach the clip of the ESD wristband to the ESD bracket or bare
metal on the DPE enclosure, and put the wristband around your
wrist with the metal button against your skin.
•Handle CRUs gently. A sudden jar, drop, or vibration can
permanently damage a CRU.
•Never use excessive force to remove or install a CRU.
•Store a CRU in the antistatic bag and specially designed shipping
container in which you received it. Use that container if you need
to return the CRU for repair.
•Maintain the location where you store CRUs within the limits
specified in Appendix A.