RCA Victor TRK-12, Manual

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PAGE 2 5 4 - C
TRK9, TRK90, TRKI2, TRKI20
SERVICE
Kinescope Installation (TRK-9, TRK-90).
1. Remove back cover of cabinet.
2. Remove the two screws which secure the wooden block,
on which the yoke is mounted, to the upper shelf, and drop
this block and yoke away from the shelf.
3. Loosen the thumb screw in the center of the slotted
block of wood on the tbp shelf, pull this block of wood to*
wards the rear of the cabinet and turn it so that the **V" slot
on the front end of the block is to your right.
4. W earing gloves and goggles, carefully slide the Kine*
scope on the “V ” in the block, and turn both the block and
the Kinescope so that the Kinescope faces the viewing win'
dow. Slide the Kinescope up to the mask in the window and
fasten loosely in place by sliding the “V*' block up to die
bottom of the Kinescope face, and fastening it with the
thumb screw.
5. Place the yoke and the wooden block on which it is
mounted, on the Kinescope neck, rotate the block 90° from
its original mounting position in order to have it clear the
top of the cabinet and slide it into position on the Kinescope
neck. DO N O T FORCE YOKE. In some cases where the
yoke lead is too short it may be necessary to loosen the “V”
block and swing the Kinescope neck to the left in order to
be able to place the yoke on the Kinescope neck -without
forcing.
6. Fit the upper part of the wooden yoke mounting block
into the slot on the underside of the cabinet top and fasten
the lower end of the block securely by means of the two
screws. The Kinescope should be mounted loosely in place,
so that the yoke is not forced on the Kinescope neck at. any
time.
7. Loosen the wing nuts on the yoke mounting bracket,
and move the yoke forward on the neck of the Kinescope so
that it pushes the Kinescope against the mask. Tighten the
wing nuts to hold the Kinescope and yoke securely in this
position.
8. It may be necessary to rotate the Kinescope, within the
limits allowed by the high voltage second anode lead, with re'
spect to the mask in order to obtain proper masking of the
Figure 3A — Cabinet Wiring—Model TR K -9, TRK-90
D A T A
edges on the Kinescope screen. Before rotating the Kine'
scope, the screws holding the yoke mounting block should be
loosened, so that the Kinescope neck will not be forced.
9. Move the “V " block forward so that it holds the bot'
tom of the Kinescope in place. Tighten the thumb screw.
10. Place the second anode lead on the second anode cap
at the side of the Kinescope.'
11. After the receiver is operating, and if the picture is
not squared with the mask, using a screw driver loosen the
clamping screws on the band around the yoke and rotate the
yoke until the picture is squared with the mask, then tighten
these clamping screws securely.
CA UTIO N : When removing the back cover of the cabi'
net, after the screws have been removed do not allow the
cover to slide down on the neck of the Kinescope, or the
neck of the Kinescope may be snapped off.
Kinescope Installation (TRK-12, TRK-120).— Refer to fig'
ure 4.
1. Remove back cabinet cover.
2. Remove the top safety glass cover by removing the
three wing nuts “E” at the two front corners and right reąr
corner of the cover and loosening the wing nut “E*° at the
left rear corner of the cover.
3. Lift the cover straight upwards, taking care not to
scratch the cabinet finish with tne protruding screws or the
cover itself.
4? Loosen the two Wing nuts “F” on the yoke holding
frame, and allow the yoke to drop down as far as possible.
5. Using gloves and goggles, open the Kinescope shipping
carton and remove the top cover on the Kinescope.
6. Remove the Kinescope from the shipping carton (do
not remove the close fitting cardboard shield from the Kine'
scope), and insert the Kinescope into the cabinet, guiding
the neck of the Kinescope into the yoke! Do not force the
neck of the Kinescope into the yoke, or the tube may
break. Let the Kinescope down slowly so that it finally rests
on the yoke.