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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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Saturday, 16 February 2019

GENERIC CRT MONITOR BLOCK DIAGRAM

CRT Monitor block diagram

BLOCK DIAGRAM OF CRT MONITOR


Light color image: a color picture signal components and integrated into a video image by scanning principle, with three monochrome images are generated on the color picture tube through which the principles of color mixing color image synthesis is displayed with full color.




Block power supply: power supply block of Monitor operating under the principle of pulse sources or switching, the input voltage is applied can vary quite widely from 150V AC to 250V AC, output voltage typically provide 5 types of power fixed DC voltage to provide for other blocks in the machine.

* Volume scanning lines: A block is responsible for creating the high voltage supply for the light work around the same time it provides flow control horizontal scrolling driver to drive electron beam scans the screen horizontally.

 *Block raster: raster block's mission is to provide the pulse frame for the roll.Drive along to stretch the screen vertically.

* Block amplification Video: Video signals from Card to put in three lines R, G, B is very weak amplitude of about 0.2 V are two-story video amplifier amplifies the signal strong enough to approximately 40V amplitude before to control the emission current from cathode.
 * Block Processor (CPU) is a control block is responsible for sharp changes in frequency, change the screen size, change brightness, contrast and creates on-screen display