Saturday, May 15, 2010

Television Schematics

Television schematics are complex drawings of the electronic components that make up the circuitry of the television set. The big board that forms the platform for all of the electronic components is called a motherboard. In today�s TV sets, the circuits are printed on the board using silver and gold to create the wires connecting each of the components. If the wires need to cross each other, a layer of a clear insulating material is placed between them. This insulating material serves the same function as the plastic or rubber sheathing around a lamp cord. It keeps the two wires from touching each other and causing a short circuit and frying the motherboard. The picture below is of typical television schematics.

Typical Television Schematics

Television schematics are used by repair and installation technicians so they know what components are attached to each other. These television schematics provide a guide so a repairman does not accidentally hook up things that will burn each other out.

Since some of the components in a conventiaonal TV set carry a high enough voltage to kill a human being, these items are clearly marked on televisions schematics to prevent injury. Conventional TVs are TV sets that use a cathode ray tube to display the picture on the screen.

Most of the newer TV sets not only have television schematics but they are also color coded to make reading them a lot easier. In the picture above, there are dotted lines around an entire section of the television schematics in the lower left hand corner. That dotted line means that this is a separate module of the television set, most likely a removable printed circuit board that can be replaced to repair or upgrade the set capabilities.

Television schematics are produced by electrical engineers using computer programs called computer aided drawing programs (CAD) that can cost thousands of dollars for each license. The engineer actually designs the individual components that go into the set by creating a separate schematic for each module of each components and then combining all of the separate module schematics into the main television schematics that will be shipped with the new television set as part of the owner�s documents.

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