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4-3 Other Adjustments
4-3-1 General
1. Usually, a color TV needs only slight touch-up
adjustment upon installation. Check the basic
characteristics such as height, horizontal and
vertical sync and focus.
2. The picture should have good black and white
details. There should be no objectionable color
shading; if color shading is present, perform the
purity and convergence adjustments described
below.
3. Use the specified test equipment or its
equivalent.
4. Correct impedance matching is essential.
4-3-2 Automatic Degaussing
A degaussing coil is mounted around the
picture tube, so that external degaussing after
moving the TV should be unnecessary. But the
receiver must be properly degaussed upon
installation.
The degaussing coil operates for about 1 second
after the power is switched ON. If the set has
been moved or turned in a different direction,
disconnect its AC power for at least 10 minutes.
Samsung Electronics
5. Avoid overload. Excessive signal from a sweep
generator might overload the front-end of the
TV. When inserting signal markers, do not
allow the marker generator to distort test
results.
6. Connect the TV only to an AC power source
with voltage and frequency as specified on the
backcover nameplate.
7. Do not attempt to connect or disconnect any
wires while the TV is turned on. Make sure
that the power cord is disconnected before
replacing any parts.
8. To protect against shock hazard, use an
isolation transformer.
If the chassis or parts of the cabinet become
magnetized, poor color purity will result. If
this happens, use an external degaussing coil.
Slowly move the degaussing coil around the
faceplate of the picture tube and the sides and
front of the receiver. Slowly withdraw the coil
to a distance of about 6 feet before removing
power.
Alignment and Adjustments
4-7
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