3–22
Removing and Replacing FRUs
WARNING
Do not dispose of any CRT until it is rendered inoperative and
safe to dispose.
Never perform the following disposal procedure at the customer
site. Return the defective CRT to the local Digital facility for
disposal.
At the Digital facility you must:
• Clear the area of nonessential personnel.
• Have a second person in the area in case of an emergency.
• Wear safety goggles (PN 29-16141-00).
• Wear gloves (PN 29-16146-00).
• Use pliers.
WARNING
To avoid injury to your eyes or hands, always wear goggles
and gloves when you work with a CRT. Never handle pieces of
phosphor-coated glass without wearing protective gloves.
Before you perform the following procedure, remove the FRUs listed in
Section 3.2.6.
1. Place the old CRT/chassis assembly and the original packing material
in the container from which you removed the new CRT/chassis
assembly.
2. Using pliers, slowly crush,
but do not snap,
the evacuation point
(Figure 3–15). Do not move or disturb the CRT until the hissing
sound of in-rushing air stops.
CAUTION
Use care not to break the unprotected glass area of the CRT
neck that surrounds the evacuation point.
NOTE
The evacuation point is a protrusion that extends from
the circular area defined by the CRT neck pins. The glass
protrusion is sometimes encased in a protective plastic cap,
and more force is required to crush it.
