If you no how to use a multimeter and no how to test diodes, resistors, capacitor, inductors, and transfromers then your a little ahead of the game if not then I try to find a course to teach you basic electronics. Hands on is always the best way to learn something so I’d Suggest collecting broken electronics and appliances from your friends, relatives, the dump, garage sales and flea markets, etc. Start on those that have been written off – you will screw up at first, we all did. As times passes your batting average will improve. It may not happen overnight but it will happen if you apply yourself. There will be many relatively easy successes but the ‘tough dogs’ may make up for these triumphs. Don’t let them get to you – not everything can be repaired. Sometimes, the basic design is flawed or someone before you messed up royally. Troubleshooting is like being a detective but at least the device is generally not out to deceive you.

Experience will be your most useful companion.

If you go into the profession, you will obtain or have access to a variety of tech tips databases. These are an excellent investment where the saying: ‘time-is-money’ rules. However, to learn, you need to develop a general troubleshooting approach – a logical, methodical, method of narrowing down the problem. A tech tip database might suggest:Replace C536′ for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don’t have a service manual or schematic and your tech tip database doesn’t have an entry for your sick TV or DVD.

While schematics are nice, you won’t always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don’t see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.

 Here are just a few basic listings and schematics.

 

 

 Schematic Symbols

 

 

   Dual Volatge Regulator

 

 12 Volt 20 Amp Voltage
Regulator Circuit

  I no it all looks so confusing been doing it for over 30 years now and it is always a learning curve! There are alot of online courses available and even some good books and guides.

HDTV and Video Systems Repair, 1st Edition HDTV and Video System Repair is a comprehensive reference for technicians and engineers on theoretical design and troubleshooting techniques for video system electronics including: HDTV (High Definition Television), LCD display technology, MP3 technology, projection television, satellite receivers, computer monitor technology and much more! The approach of this reference moves from basic theory to practical troubleshooting techniques using the input-output model to discuss electronic circuitry detail. The book also includes numerous diagrams and schematics for visual references.