Cathode Corner SCTV, Инструкция по сборке и эксплуатации

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SCTV Clock Assembly Manual 1/24/22 26
CRT installation
Insert the CRT face-first into the front face from the rear. Insert the CRT base into the clamp ring, with
pin 1 on the base towards the PC board. The felt may be a tight fit in the front face hole, so run your
fingernail along the outside of the felt to compress it where it get stuck on the way into the hole.
Check that 1/16” of felt is protruding out from the plastic at the bottom of the CRT face. (The font panel
may be tilted, so the bottom is a better reference than the top.)
Tighten the CRT clamp snugly with the CRT in this position. There will be a final adjustment later with
the display on, so don’t put too much effort into the alignment now.
Fold a dish towel into a 3” x 6” or so rectangle, to use as a cushion for the CRT face. Place the clock
face down on this cloth so that the face of the CRT can press firmly against the towel between the pot
shafts.
Rotate the socket so that the key on the socket lines up with the key on the CRT, then press the socket
down onto the pins. Some force may be required to do this. DO NOT press on the socket pins, as these
are fragile and may break off. Press on the white ceramic only. You may not be able to seat it fully, but
try to make the gap between CRT base and socket be less than 1/8” (3mm).
Check that the CRT wires are routed cleanly from the socket, through the rear face, to the PC board. The
neatest appearance is with the gun wires below the deflection wires.
Knob Installation
Rotate each of the four pot shafts counterclockwise as far as possible.
Take one of the small knobs and adjust its setscrew out two turns with a 1/16” hex driver. Install the
knob on one the pots, with the dot in the 7 o’clock position. This means that the hex driver will be in the
one o’clock position, above and to the right of center. Tighten the set screw snug.
Repeat for the other three small knobs.
Place the brass spacer into the large knob. You will have to loosen the setscrew a couple of turns.
Tighten the setscrew just enough to hold the spacer in place. Place the knob on the encoder shaft with
the setscrew side facing the round side of the shaft. Check that it is pushed onto the shaft all the way.
Tighten the setscrew snug.
Check that the big knob can be pushed in to hear a click, and that it springs back. If not, readjust its
depth on the shaft to allow it to move in and out freely.