Crt Disposal (Digital Service Representatives Only) - DEC VT420 Service Manual

38 Removing and Replacing FRUs
3.5 CRT Disposal (Digital Service Representatives
Only)
This section describes how to safely dispose of the monitor's cathode-ray
tube (CRT).
NOTE
This procedure replaces any other tech tips on replacing and
disposing of CRTs. This procedure is for Digital personnel
only, and is not intended for use by OEM and self-maintenance
customers.
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.
To prevent personal injury from CRT implosion, use the following
guidelines and disposal procedure to remove and dispose of a CRT. These
guidelines and procedure are Digital service policy for all CRTs more than
three inches in diameter.
Location
Work in areas where risks and exposure are limited to trained Digital
service personnel. Only Digital service personnel should be in the area
during CRT removal and replacement.
Protective Gear
Any service person replacing a CRT must wear at least safety goggles and
the approved gloves.
PN 29-16141
Safety goggles
Gloves PN 29-16146
WARNING
To avoid injury to the eyes or hands, always wear goggles and
gloves when you work with a CRT.