الأجهزة اللازمة لإصلاح وضبط الجهاز التلفزيوني الأحادي اللون والملون ٢_a .

3 -Scan Frequency Generator:

This device is used with an oscilloscope to show the response curve - and the range of scanning frequencies depends on the specifications of the device. The device shown in Figure (5-21) has the following specifications and others:

1 - Scanning frequency for epitaphs from 0 to 6MHz (MHz).

2 - The average scanning frequency (IF) ranges from 35 to 50 MHz.

3 - Frequency 10.7 MHz to adjust the FM signal and adjust the middle frequency of the sound.

4- Statement of the modified and unmodified signal with crystal control.

5- The scanning frequency of channel 4 and channel 10 with the RF signal for voter expression.


4- RF Signal Generator:

This device gives an RF signal and may be used with a frequency scanning generator (Fig. 6-21).

5- Scan Bar Generator:

It is part of a device called the Video Analyzer, and it has many functions, including adjusting and calibrating the image IF, color, and its measurement - and it generates colored signals in the form of lines, points, cross lines, and others. and fig
(7-21) A picture of a template generator with pistons covering 16 templates.

6- Color Pattern Generator:

It is defined as a generator of colored lines or bars, and it may be part of the visual analyzer device (Fig. 8-21). It is very useful in examining and repairing colored devices. Some of its functions are:

1- Testing the purity of the screen valve using the white linear structure model.

2- Testing, adjusting and repairing the color circuits and calibrating the automatic frequency and phase circuit (AFPC) (using the colored bars model).

3- Testing or adjusting the static match using the points model (Fig. 10-21).

4- Testing or adjusting the kinetic matching using (intersecting lines model).

e- Testing or adjusting the linearity of the survey using the model of intersecting lines or horizontal and vertical lines.

6- Testing or adjusting the deformation correction of the pin cushion using the previous models in item (5).

​​​​​7 - Adjusting the concentrator using the cross-lined model, and it has many other functions mentioned in the instructions for using the device.