SU373666A1 - DEVICE FOR THE CONTROL OF THE CARD OF INFORMATION OF THE RAYS OF THE KINESCOPE COLOR TELEVISION RECEIVER - Google Patents

Description

one

The invention relates to television technology and can be used, in particular, to control the convergence of the kinescope rays of a color television receiver.

A device is known for controlling convergence boards of beams, a kinescope of a color television receiver containing a horizontal and frame frequency pulse generator, the signals from which are fed to the inputs of the checked and reference convergence boards controlled by a signal from the control unit, an electronic switch and an indicator.

However, the known device has insufficient accuracy of control.

In order to improve the accuracy of control in the proposed device, serially connected test signal generator and controlled switch of test signals are connected between the outputs of the note boards, and the switch of the circuit boards, a signal between the outputs of the boards and the inputs of the controlled electronic switch from one of the outputs of which is fed to the control input of the switch test signals.

The drawing shows a block diagram of the proposed device.

The device contains a generator / pulses with a horizontal and frame frequency, generator 2

test signals, switch 3 test signals, unit 4 controls the electronic switch 5, switch 6 circuits of the information boards, generator 7.

In addition, the device includes a reference note fee 8 and a check note fee 9.

From the output of the horizontal and frame frequency pulse generator, the corresponding pulses

are fed to the input of a test signal generator, which generates a pulse voltage imitating the voltages applied to the convergence board during operation of a color television receiver. The test signal generator is connected to the input of the test signal switch, which allows the selection of test signals depending on which of the information board circuits is monitored. From the switch of the test signals, the pulses are fed to the inputs of the test and reference information boards, as well as to the control unit of the electronic switchboard, designed to select the switching frequency of the electronic switchboard.

Signals from monitored and reference boards

data is input to the switch

intelligence circuit chains making the selection of the appropriate circuits to be monitored.

3

Measuring resistors are located in the switch of the circuit boards of the information boards, from which the controlled forms of currents are taken. A circuit switch connects a series of monitored currents to the input of the electronic switch. The period of switching pulses arriving at the electronic switch from the control unit of the electronic switch, depending on the choice of the controlled circuit of the convergence board, may be equal to twice the horizontal or frame frequency period.

The switch of the circuits of the note boards also controls the operation of the switch of the test signals, determined in the latter by the choice of the forms of pulsed voltages applied to the inputs of the boards of the note and the control unit of the electronic switch.

Through an electronic switch, monitored forms alternately with the test and reference information boards are connected to the indicator input, by which they are compared with each other by the operator.

Subject invention

A device for monitoring the flattening board of a kinescope of a color television receiver, containing a horizontal and vertical frequency pulse generator, the signals from which are supplied to the inputs of the checked and reference miniature intelligence boards, controlled by a signal from the control unit of an electronic switch,

Connected with an indicator, for example, an oscilloscope, characterized in that, in order to increase the control accuracy, between the outputs of the horizontal and frame frequency pulse generator and the inputs of the note boards are included

serially connected test signal generator and controlled test signal switch, and between outputs of boards and inputs of controlled electronic switch, switch of circuits of note boards is turned on, the signal from one of the outputs of which is fed to control input of switch of test signals.