By Homer L. Davidson
During this up to date variation of his best-selling consultant, Homer Davidson, grasp of buyer electronics, presents wizardly hands-on recommendation on troubleshooting and repairing a variety of digital units -- with out the advantage of schematic diagrams. * Covers vehicle stereos, cassette avid gamers, stereo audio circuits, radios, VCRs, TVs, speaker structures, CD-players, and extra * NEW insurance of DVD avid gamers and handheld remote control devices * greater than four hundred targeted drawings and pictures to demonstrate the most productive solution to find, attempt, and service faulty elements content material Servicing tools with no Schematic the best way to find, try out, and service Troubleshooting and Repairing Audio Amps, huge and Small Servicing car Receivers Servicing Cassette gamers Troubleshooting CD avid gamers Troubleshooting the television Chassis Servicing strength offers Servicing Stereo Sound Circuits Troubleshooting AM/FM/MPX phases VCR and TV/VCR mixture upkeep Repairing handheld remote control devices DVD participant maintenance
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Extra info for Troubleshooting & Repairing Consumer Electronics Without a Schematic
Sample text
Do it today, not tomorrow Do not set that “tough dog” product aside for several weeks before you attempt to repair it. Callbacks or electronic products returned for the second time can be put off until tomorrow, but tackle the “tough dog” problems at once. Often the repair time Intermittent problems 21 Adjustments Transistor Socket Transistor Adjustments Color transistor 1-21 Check the indicated parts on a CRT board for missing colors and a poor black-andwhite picture. involved may be less than 1 hour.
Replace the bypass or electrolytic capacitor at the transformer voltage resistor. Suspect a defective flyback or poorly soldered connection on the horizontal output transformer. Scope for insufficient horizontal drive signal at the base terminal of the output transistor. Last but not least, check for a defective safety capacitor. Most of these service problems can happen in any TV chassis. A COMMON RADIO-CASSETTE CASE HISTORY Speed problems within the cassette player occur at one time or another in virtually all radio-cassette players.
However, you might have to blow off dust to see the burned components. Sometimes you can smell burned or charred parts. The PC board might have to be repaired if it has been burned and damaged. Large parts such as transformers, electrolytic capacitors, and power output transistors can be seen easily. Check for a part number on the body. It is difficult to determine the total resistance in charred resistors. If the color code cannot be seen, try to locate a schematic similar to the chassis on the bench.