Alignment and Adjustments
5. Alignment and Adjustments
5-1 General Alignment Instructions
1. Usually, a color TV-VCR needs only slight5. Avoid overload. Excessive signal from a sweep
touch-up adjustment upon installation. Checkgenerator might overload the front-end of the
the basic characteristics such as height, hori-TV. When inserting signal markers, do not
zontal and vertical sync and focus. allow the marker generator to distort test
results.
2. Observe the picture for good black and white
details. There should be no objectionable6. Connect the TV only to an AC power source
color shading; if color shading is present,with voltage and frequency as specified on the
demagnetize, perform purity and convergencebackcover nameplate.
adjustments described below.
7. Do not attempt to connect or disconnect any
3. Use the specified test equipment or its equiva-wires while the TV is turned on. Make sure
lent.that the power cord is disconnected before
replacing any parts.
4. Correct impedance matching is essential.
8. To protect against shock hazard, use an isola-
tion transformer.
5-2 Automatic Degaussing
A degaussing coil is mounted around the pictureIf the chassis or parts of the cabinet become
tube, so that external degaussing after movingmagnetized, poor color purity will result. If
the TV should be unnecessary. But the receiv-this happens, use an external degaussing coil.
er must be properly degaussed upon installa-Slowly move the degaussing coil around the
tion. faceplate of the picture tube and the sides and
front of the receiver. Slowly withdraw the coil
The degaussing coil operates for about 1 sec-to a distance of about 6 feet before turning
ond after the power is switched ON. If the setpower OFF.
is moved or turned in a different direction,
the power should be OFF for at least 10 min-If color shading persists, perform the follow-
utes.ing Color Purity and Convergence adjust-
ments.
5-3 High Voltage Check
CAUTION: There is no high voltage adjust-2. Turn on the TV. Set the Brightness and
ment on this chassis. The B+ power supplyContrast controls to minimum (zero beam cur-
should be +130 volts (with full color- barrent).
input and normal picture level).
3. Adjust the Brightness and contrast controls to
1. Connect a digital voltmeter to the secondboth extremes. Ensure that the high voltage
anode of the picture tube.does not exceed 32 KV under any conditions.
Samsung Electronics5-1 |
ACEC
