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7. TROUBLESHOOTING
7.1 PROBLEMS OF PICTURE
The most common types of picture problems are as follows:
IGNITION
Black spots or horizontal streaks appear, or
the picture flutters or drifts. This is usually
caused by interference from car ignition
system, neon lamps, electric drills, or other
electrical appliances.
GHOSTS
Ghosts are caused by the television signal
following two paths. One is the direct path, the
other is reflected from tall buildings, hills, or
other objects. Changing the direction or
position of the antenna may improve the
reception.
SNOW
If the antenna is located in the fringe area of a
television signal where the signal is weak, the
picture may be marred by dots. When the
signal is extremely weak, it may be necessary
to install a special antenna to improve the
reception.
RADIO FREQUENCY
INTERFERENCE
This interference produces moving ripples or
diagonal streaks, and in some cases, loss of
contrast in the picture.
CRT DEGAUSSING
If the TV screen has been magnetized with
improper colour appearing on the particular area
of screen, power off the TV (or unplug AC cord).
After 10 minutes, turn on the main power (or plug
in AC cord). Repeat the above process until
improper colour disappear.
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