Removing and Replacing FRUs
3–21
3.3 CRT Disposal (Trained Service Personnel Only)
This section describes how to safely dispose of the monitor cathode-ray
tube (CRT). CRTs are glass vacuum tubes. Because air pressure outside
the tube is greater than air pressure inside, there is always the possibility
of accidental implosion.
WARNING
You must handle CRTs very carefully to avoid accidental
implosion and shattering glass. Use the following guidelines
and disposal procedure to remove and dispose of a CRT. These
guidelines and procedure are Digital policy for all CRTs with
more than three inches in diameter.
NOTE
This procedure supersedes all other tech tips about replacing
and disposing of CRTs. This procedure is for Digital personnel
only, and is not intended for use by OEM and self-maintenance
customers.
Location
Work in areas where risks and exposure are limited to trained Digital
personnel. Only Digital personnel should be in the area during CRT
removal and replacement.
Handling a CRT
• Never handle the CRT by the neck. Always use two hands and hold
the CRT by the sides near the face of the tube.
• Keep the CRT away from your body during handling.
• Do not let the neck strike anything.
• Do not rest the CRT on its neck.
• Do not let the CRT touch any tools, such as screwdrivers and soldering
irons.
Stocking and Storage
All CRTs must be kept in a closed container or mounted in the device
cabinetry.
CRT Disposal
Use the following procedure to safely dispose of CRTs. Always perform
this procedure at a Digital facility.
