Crt And Deflection Yoke Removal And Installation - Tektronix 4010 Maintenance Manual

Place a small piece of tape on the surface of the filter,
outside of the display area. This will be used as a reference
during replacement. If a new filter is to be installed, it will
be used for comparison.
Remove the angle brackets from the top and the bottom
of the filter, after removing the two screws from the ends
of each.
Lift the filter out of the neoprene mounting ring. It may
be necessary to use a thin-bladed device to aid in removal.
Use caution to avoid scratching or breaking the filter.
Cleaning. Clean the face of the CRT and the under-side
of the filter, using a soft cloth and a mild soap and water
solution. Note that the under-side can be distinguished
from the outer surface by the masking tape if the original is
being re-installed. If the old filter is being replaced with a
new one, the under-side can be determined by comparing it
with the old filter. Note that less glare from reflected light
is apparent on the outer surface than on the under surface
of the filter.
Installation. Put the filter in place in the recess in the
neoprene mounting ring. The outer surface should be flush
with the edge of the frame when properly installed. It may
CRT
(AI Integral yoke-mounting bracket installation.
Servicing-4010 Maintenance
be necessary to use a non-abrasive device (such as a
toothpick) to work the filter into place.
Install the angle brackets and fastening screws.
Clean the outer surface of the filter, using a soft cloth
and a mild soap and water solution.
Install the face mask and fasten it in place with the four
screws.
CRT and Deflection Yoke Removal and
Installation
I
WARNING
I
The CRT may implode if it is scratched or struck
severely. Do not handle the CRT by its neck. Wear
protective clothing and a face shield when handling
the CRT.
Introduction. There are two types of yoke-mounting
hardware in use in the Terminal. The original type (integral
yoke-mounting bracket) is shown in Fig. 3-2(A). Fig. 3-2(8)
yoke-mounting bracket
CRT
bracket and shield mounting nut
(81 Separate yoke-mounting bracket installation. Magnet
rings may or may not be present; they should only be used
when supplied with the CRT being installed.
Fig. 3-2. The two types of yoke-mountings.
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3-5