REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

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 VCR.

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.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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Saturday, 16 February 2019

IDENTIFICATION OF THE CLASSIFICATION AND MEASUREMENT OF FET

Identification of the classification and measurement of FET

Symbols: the "Q, VT", FET referred to as FET, is a semiconductor device is to control the output current through the voltage, the voltage control device     FET is divided into three very        extremely

drain : D (for electrode) 

    S is extremely source (output pole)
the very gate of the G and (control)     




   D and S poles are used interchangeably       FET Legend: FET Category:    FET channel points can be divided into can be seen in the symbol map for the N-and P-channel tube (not the same as the direction of the arrow in the middle).    Material points can be divided into junction tubes and insulated gate tube, insulated gate type is further divided into depletion-mode and enhanced general on the motherboard are mostly insulated gate tube is referred to as the MOS transistor, and most of the enhanced N-channel , followed by enhanced P-channel junction pipe and the depletion tube almost no. FET characteristics:     1, working conditions: D, very have a power supply, the G pole should have control voltage     N-channel field on the motherboard more than, G voltage the higher the higher the S pole output voltage     field pipe G voltage up to 12V on the motherboard, the DS completely turn-on, individual motherboard on a 5V turn-on     field tube of DS features interchangeable    N-channel tube conduction cut-off voltage:     conduction conditions: VG > VS, VGS = 0.45 - 3V, a conduction state, and VGS greater the ID of the greater cut-off condition: VG