RU182112U1 - ELECTRONIC COMPONENT DEVICE TESTER - Google Patents

Abstract

The utility model relates to structures used in the diagnosis of electronic components of radio engineering, in particular for testing zener diodes, adjustable zener diodes and optocouplers.

The electronic component tester consists of a board on which three modules are mounted: a module for testing zener diodes, a module for testing adjustable zener diodes, and a module for testing optocouplers. The modules have a common power supply circuit. Indication - LED and digital voltmeter. Contact connectors are provided for connecting test items.

Testing of all the above electronic components is carried out separately by connecting them to the corresponding contact sockets. Evaluation of the health of the elements is made by the LED and a digital voltmeter.

The technical result in the implementation of the claimed technical solution is to create a device that combines three circuits in one case for checking electronic components - zener diodes, adjustable zener diodes and optocouplers. Such a device is of particular value, for example, in the repair of switching power supplies for personal computers, laptops, chargers, which include all of the above electronic components. 1il.

Description

The utility model relates to structures used in the diagnosis of electronic components of radio engineering, in particular for testing zener diodes, adjustable zener diodes and optocouplers.

There is electronic equipment, which simultaneously includes zener diodes, adjustable zener diodes and optocouplers, for example, switching power supplies for personal computers, laptops, and chargers. When repairing such equipment for the diagnosis of electronic components, several different measuring instruments must be used simultaneously, because There is no device that combines all the necessary functions.

Known factory-made device that allows for the simplest diagnosis - to assess the physical health of the zener diodes, adjustable zener diodes and optocouplers (internal break or short circuit elements) [1]. The disadvantage of this device is that it does not allow you to check the performance of the element, the ability to perform its functions. For example, measure the stabilization voltage of the zener diode or the change in the state of the output transistor of the optocoupler (open or closed) when an input control signal appears.

Known factory-made device that allows you to measure the voltage stabilization of the zener diodes [2]. The disadvantage of this device is that it does not allow testing of two other electronic components - adjustable zener diodes and optocouplers.

Known factory-made device that allows you to measure the voltage stabilization of the zener diodes, to test the optocouplers [3]. The disadvantage of this device is that it does not allow testing adjustable zener diodes.

Typical schemes are known for checking and measuring the stabilization voltage of a zener diode [4], checking and measuring the stabilization voltage of an adjustable zener diode [5], and checking an optocoupler [6], [7]. The disadvantage is that each of these circuits allows testing only one electronic component.

The objective of the utility model is to create a device that combines three circuits in one housing for testing electronic components — stabilitrons, adjustable zener diodes and optocouplers.

The technical result is an increase in the repair efficiency of electronic equipment.

An electrical circuit diagram of an electronic component tester is shown in FIG. 1. Three modules are mounted on board 1: module 2 for testing zener diodes, module 3 for testing adjustable zener diodes, and module 4 for testing optocouplers. The modules have a common power supply circuit 5, the voltage to which is supplied through contacts 6 and 7, the indication is LED 8 and a digital voltmeter 9. Contact connectors 10, 11, 12 and 13 are provided for connecting the tested elements.

For testing zener diodes, adjustable zener diodes and optocouplers, 12V power supply is connected to pins 6 and 7, for example, from a laboratory controlled source. Testing of all the above electronic components is carried out separately by connecting them to the corresponding contact sockets. Evaluation of the health of the elements is made by the LED 8 and a digital voltmeter 9.

To check the zener diode 16, it is necessary to connect, observing the polarity of the cathode to pin 10 and the anode to pin 11. After pressing button 14 on the digital voltmeter 9, a value equal to the stabilization voltage of the zener diode in volts is displayed. To check the zener diodes with a higher stabilization voltage, it is necessary to increase the supply voltage of the tester from a laboratory controlled source (not shown in Fig. 1).

To test the adjustable zener diode 19, for example, TL431, it must be connected to the terminal 12. After pressing the button 17, the digital voltmeter 9 displays a value equal to the stabilization reference voltage of the adjustable zener diode in volts. If this figure corresponds to the nominal passport (U = 2.5V for TL431), with acceptable limits, then the element is considered serviceable.

To check the optocoupler 22, for example, PC817, it must be connected, observing the polarity to the terminal 13. If, after applying the control signal by pressing button 23, the output transistor of the optocoupler opens and LED 8 lights up, then the internal elements of the tested optocoupler are considered to be working.

List of sources:

1. Multimeter digital MASTECH M 832 [Electronic resource]. URL: http://www.mactak.ru/store/multimetr-tsifrovoy-mastech-m-832 (accessed: 07.17.2017).

2. Tester of electronic components "BABY" [Electronic resource]. URL: http://www.radiodevices.ru/kiddy/kiddy.htm (accessed: 07.17.2017).

3. Multifunctional Test Device BR886A [Electronic resource]. URL: https://m.aliexpress.com/item/Free-ship-Multifunction-lamp-appliance-repair-tester-light-test-Voltage-regulator-tube-test-Optocoupler-Ignitor-Coil/736697243.html? spm = 2114.41010308.4.14.qYD8D0 (accessed date: 07/17/2017).

4. How to check the voltage of the zener diode [Electronic resource]. URL: http://diodnik.com/en/kak-proverit-napryazhenie-stabilitrona/ (accessed: 07.17.2017).

5. How to check the adjustable zener diode [Electronic resource]. URL: http://schema-montage-electronique.blogspot.ru/2011/07/montages-de-regulateurs-et-reference-de.html (accessed: 07.17.2017).

6. A device for checking various optocouplers [Electronic resource]. URL: http://remont-aud.net/forum/89-12039-1 (accessed: 07.17.2017).

7. Device for checking optocouplers [Electronic resource]. URL: http://radioskot.ru/publ/remont/probnik_dlja_proverki_optopar/4-1-0-1158 (accessed: 07.17.2017).

Claims (1)

The device is a tester of electronic components, characterized in that it consists of a board with three modules for testing zener diodes, adjustable zener diodes and optocouplers having a common power supply circuit.

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