Heathkit IO-4205 - Page 78

Page 76
INSIDE OF
CRT SHIELD
~
TAB
PICTORIAL 4-18
Refer to Pictorial4-17 (Illustration Booklet, Page 22)
for
the following steps .
Reposition
the chassis as shown.
--L.J. Locate the two shaft couplings, two 5" exten-
sion shafts, and four #6 X 1/8" setscrews fur-
nished with the vertical circuit board parts .
Start
two 6-32 x 1/8" setscrews in each shaft
coupling.
( ) Install a shaft
coupling 5/16" onto the shaft of
control R4B.
Tighten the proper setscrew.
In the same manner, install the other shaft cou-
pling on the shaft of control R4A.
NOTE:
It may be necessary to temporarily loosen the
control bracket mounting hardware (when you per-
form
the next two steps) to get proper extension shaft
alignment with the front panel holes.
Pass a
5" extension shaft through the appro-
priate hole in the front panel and into the shaft
coupling on control R4B so the shaft extends
5/16" outside the front panel. Tighten the
setscrew in the shaft coupling.
~ ) In the same manner, install a 5" extension shaft
through the proper hole in the front panel and
~ ~ ....
into the shaft coupling on control R4A.
Locate
the graticule and remove the protective
backing. (There
may also be a protective film on
the face of the graticule which must be removed
at this time.)
Place
the graticule in the large rectangular
opening in the cabinet front from the inside.
Position the printed side of the graticule to the
outside.
NOTE:
When you install the felt strip in the next step,
its
edge must be against the graticule to hold the
graticule
in place in its opening in the cabinet front.
( { Remove
the protective backing from the felt
strip.
Then press the felt strip inside the CRT
ring, starting on the side nearest the edge ofthe
cabinet front. The adhesive side must be "out"
against the plastic cabinet front. DO NOT allow
the ends to overlap. Cut off any excess.