مجموعة ملفات الإنحراف في الأجهزة الملونة (Yoke) .. كتاب التلفزيون الملون والعادي

17-15 Set of color deviation coils (yoke):

two-part deflection. Two files for vertical deflection include a number of books, and two files for horizontal and horizontal deflection with a vertical view on the screen (Figure 17-26). It is similar to a horse saddle and can have a radius of up to (110°) or more. The second type is called (annular). There are deflection files of both types as shown in the figure in the horizontal deflection files. Its self-induction is 2.9 MilliHenry and its Omani resistance (DC) is (2) (ohms). As for the vertical deflection coils, it is connected in series, its self-induction is (29) MilliHenry) and its universal resistance is 10 ohms. And the type of coiled coils is less impedance than the saddle type because its name is common in transistor and thyristor circuits, because the output impedance of these circuits in the horizontal output is less than the first degree of the valve circuits.

17-16 High Voltage Elements in the Horizontal Circuit:

The high voltage transformer comprises the group of windings including the by-products which give the high voltage. Its insulators are large, a two-conductor axle is connected on the one hand to the high voltage of the transformer through a cable with a large dielectric, and on the other hand it gives the electric current to the screen, via a high-dielectric cable connected to a special gap in the addition of the pulpit - and it is known that modern devices with fuses in the The fuses on each of the fuses are on the fuses on the fuses on each. More effective and less faulty Figure (17-28).

High Voltage Raising Circuit (CASCAD):

The output voltage is from the separate mains voltage. Therefore, a triple voltage multiplier circuit is used consisting of a number of rectifiers and capacitors integrated together, and is well isolated. After raising the voltage from about (8.5 k) to more than 26.5 k, and press this voltage according to the measurement of its injury - as if the sum of it was a smoothing capacitor of continuous high voltage.

17-17 Controls of the horizontal stage in color television:

The method of adjusting the horizontal phase in color and monochrome television is similar - and differs in the method of adjusting the high voltage in the valve - while the single-member color device does not have a higher feed. Effort in fixing (volokos) - and on that the hope that salts and steel slowed the electric current.
Therefore, it will be necessary to adjust the image width if the screen elevator voltage changes for some reason. As for adjusting linearity or straightness, I explained previously. And devices with solid elements do not require linear adjustment because it is not necessary.

Focus effort setting:

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​ ​​The color image valve requires a focus voltage of more than (5000V), to feed the focus electrode to the screen. And it must have the ability to adjust at least + 10% - and the simple way to obtain this voltage and to adjust it is to use a large variable resistance connected between the high voltage and the ground - and in other types independent coils are used on the high voltage transformer and require its own rectification and filtering circuit and the method of adjustment for the device Colored is similar to the monochrome adjustment and is done in the following way:

1- The voter tunes and tunes on a strong station so that no snow spots appear in the picture.

2- Adjust the focus so that the scan lines appear sharp and accurate in most parts
the screen .
The lighting and contrast settings must be at the normal level.