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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Tuesday, 26 February 2019

FIVE BLINKS OF STANDBY LIGHT AND SWITCES OFF [SONY WEGA SERIES TVs[KV-TG21L70 _ KV-TG21M80 _ KV-TG21P52]

FIVE BLINKS OF STANDBY LIGHT AND SWITCES OFF [SONY WEGA SERIES TVs[KV-TG21L70 _ KV-TG21M80 _ KV-TG21P52]

The fault is with AKB [Automatic Kine Bias] circuit.
Check the components on EHT return path.
Check components connected to pin number [11] of EHT transformer [T503](NX4751).
Check R514(2K2, R515_L500, R511-15K_R512-22K_R568-4K7_R513-10K_R510-220K_D504&R509-0.47Ohms/2W).  check R509 and if it resistor is open, there will be no 200VDC power path to video output section [Picture tube abse card].Check all associated components ot this path for fault.  It is best to desolder out one end of each resistor, pull it out a little up from the printed circuit board, and check the resistance.
This is a main circuit path, as the brightness level of the screen changes according to video comes from the chorma IC.  Voltage at pin number [11] of line output transformer will vary time to time according to video signal.  Cehck this variation, while the set recieves a video signal, whether it is iternal of external.  It should vary. This circuit path is connected to pin number [42] of main system control IC, whic functions as ABL [Automatic Brightness Level].