Safety is always of major concern when working on any device using
electricity. Televisions have special circuitry that allows them to
develop extremely high voltages. But it doesn't mean they are
inherently dangerous to work on. With a few words to the wise you
will be able to avoid the hazards.
First unplug the set from the wall and then from all the other
devises you have hooked up to it. And lastly don't forget to remove
the antenna or cable connection. The circuit that creates the highest
voltage is also the least likely to bite you.
This circuit is known
as the 'High Voltage Circuit'. You can recognize it quickly by the bright
red wire about ¼ inch in diameter. When operating, this circuit can develop
voltages as high as 30,000 volts. If you get too close to the anode cap
you will feel the hair on your hand start to raise. Avoiding the anode
cap should keep you out of trouble. But the one proviso is that this
cap can retain voltages in the thousands for a couple of weeks.
More likely to bite you is the 'Flyback Transformer'. More specifically
the bottom, where the pins stick through the circuit board. Voltages
here are typically under 1000 volts. But since the pins are exposed the
odds are higher that you may come in contact with them.
Finally all electronic techs have been shocked by all of the circuit
inside of a television at one time or another. The only injury I have
ever heard of , or have had happen to myself. Have been when we (techs) jerk our
hands or arms away from the source of the shock. Scrapes and that sort
of thing. But that doesn't mean you cannot get electrocuted inside of a TV.
Safety first and then comes the repair. Remove your jewelry and put on
your tennis shoes. And please unplug the set! If you still feel uncomfortable
just use this web site for reference only.
Dakota
This circuit is known