Testing device for power supply module of audio and video recorder

Abstract

The utility model relates to the field of avionic equipment testing, in particular to an audio and video recorder power supply module testing device which comprises a testing box, a wire, a spring testing needle and an external power supply. A knob switch, a voltage display module and a resistance display module are arranged on a test panel of the test box; the voltage display module and the resistance display module are connected with the spring test needle through the knob switch connecting lead; the spring test pins are in one-to-one correspondence with pins of the power supply module to be tested. The knob switch is used for switching different spring test needle pin combinations to be communicated with the voltage display module and the resistance display module; the voltage display module is used for displaying the voltage between the pin combinations; the resistance display module is used for displaying the resistance between the pin combinations; the external power supply is used for supplying power to the test box. Various function tests can be carried out on the power supply module by operating the wave band switch on the test tool panel, and the problems of time waste, poor contact and easy damage of a welding wire hole of the power supply module during manual test are solved.

Description

Technical Field

[0001] This utility model relates to the field of avionics equipment testing, and in particular to a testing device for audio and video recorder power modules. Background Technology

[0002] Currently, after power modules are assembled, they must undergo testing and debugging. Input and output power and signals all require wires to be inserted into or soldered to corresponding solder holes on the printed circuit board (PCB) for testing. This process is cumbersome, prone to miscounting solder hole positions, and inefficient. Its drawbacks include: 1. Difficult to operate during testing and the risk of damaging solder holes on the PCB. Because wiring must be done in the solder holes specified in the documentation, using pins can lead to unreliable contact, while soldering is time-consuming, labor-intensive, and inefficient, and the solder holes are difficult to clean properly during subsequent wiring. Furthermore, miscounting pins is easy when inserting pins, and there is a possibility of damaging the solder holes. 2. Low efficiency. Testing requires wiring and removing wires, and some test points require shorting some test holes. Normally, testing each power module takes 7-10 minutes, and it takes even longer for debugging workers unfamiliar with the product and technical documentation. 3. Unreliable wire contact. When using wires for testing, the contact between pins in the solder holes is unstable, and they sometimes come out of the solder holes. Utility Model Content

[0003] Purpose of the utility model: To propose a power module testing device for audio and video recorders, which can quickly and reliably complete the testing of power modules, solving the problems of time-consuming, unreliable contact, and easy damage to solder wire holes when relying on manual testing.

[0004] Technical solution:

[0005] A power module testing device for an audio / video recorder includes: a test box, wires, a spring test pin, and an external power supply;

[0006] The test panel of the test box is equipped with a rotary switch, a voltage display module, and a resistance display module; the voltage display module and the resistance display module are connected to the spring test probes via the rotary switch and connecting wires; the spring test probes correspond one-to-one with the pins of the power supply module under test.

[0007] The rotary switch is used to switch between different spring test probe pin combinations connected to the voltage display module and the resistance display module; the voltage display module is used to display the voltage between the pin combinations; the resistance display module is used to display the resistance between the pin combinations.

[0008] An external power supply is used to power the test box.

[0009] Furthermore, the rotary switch is a four-layer, eight-position switch;

[0010] The common terminal of the first layer is connected to the positive input terminal of the voltage display module; pin 1-1 of the first layer is connected to the 5V test positive terminal X22 of the power supply module under test; pin 1-2 of the first layer is connected to the power-down signal X20 of the power supply module under test; pins 1-7 and 1-8 of the first layer are simultaneously connected to the green light signal X8 of the power supply module under test.

[0011] The common terminal of the second layer is connected to the output terminal of the 5 / 3 voltage conversion module; pin 2-3 of the second layer is connected to the fault signal one X14 of the power supply module under test; pin 2-5 of the second layer is connected to the fault signal two X15 of the power supply module under test; and pin 2-7 of the second layer is connected to the fault signal three X7 of the power supply module under test.

[0012] The common terminal of the third layer is connected to the positive input terminal of the resistance display module; pins 3-3 and 3-4 of the third layer are simultaneously connected to the FDR fault signal X16 of the power supply module under test; pins 3-5 and 3-6 of the third layer are simultaneously connected to the CVR fault signal X18 of the power supply module under test.

[0013] The common terminal of the fourth layer is grounded; pin 4-4 of the fourth layer is connected to the fault signal one X14 of the power module under test; pin 4-6 of the fourth layer is connected to the fault signal two X15 of the power module under test; and pin 4-8 of the fourth layer is connected to the fault signal three X7 of the power module under test.

[0014] The negative input terminal of the voltage display module is connected to the ground of the power supply module under test; the negative input terminal of the resistance display module is connected to the ground of the power supply module under test.

[0015] Furthermore, the device also includes: a 28 / 5 voltage conversion module;

[0016] The 28 / 5 voltage conversion module is used to convert an external 28V power supply to a 5V power supply and to power the voltage display module and the resistance display module.

[0017] Furthermore, the device also includes a power indicator light, which is a light-emitting diode (LED). One end of the LED is connected to the positive terminal X1 of the power supply and is also connected to an external 28V power supply. The other end of the LED is grounded.

[0018] Furthermore, the device also includes: a voltage test port;

[0019] The positive terminal of the voltage test hole is connected to the positive input terminal of the voltage display module, and the negative terminal of the voltage test hole is connected to the negative input terminal of the voltage display module.

[0020] Furthermore, the device also includes: a resistance test port;

[0021] The positive terminal of the resistance test hole is connected to the positive input terminal of the resistance display module, and the negative terminal of the resistance test hole is connected to the negative input terminal of the resistance display module.

[0022] Beneficial effects:

[0023] A testing device for power modules of audio and video recorders is proposed. The device connects the power module under test via a test box, connecting wires, and a spring test probe, offering the following advantages:

[0024] (1) Easy to operate. When using this test fixture to test products, the power module is clamped on the fixture with the spring test probe. The switch on the tester is easy to see. When testing a certain function, simply move the switch to the specified position on the panel to easily complete the test.

[0025] (2) Saves testing time and greatly improves work efficiency. Due to its simple and reliable operation, the testing time is greatly shortened. The entire testing process using the tester takes less than 1 minute, which is 7-10 times more efficient than traditional testing methods.

[0026] (3) Improved test reliability. When testing products with this test fixture, all test points and input / output signals reliably contact the solder holes on the printed circuit board through the elastic test probes, preventing the wiring from coming loose and improving the accuracy and reliability of the test values.

[0027] (4) Improved product safety. When using this test fixture, the risk of short circuits and abnormal contact caused by the pins coming out during the original wire-connection test is avoided, and the possibility of product damage caused by human error is also avoided. Attached Figure Description

[0028] Figure 1 This is a connection diagram of a power module testing device for an audio / video recorder.

[0029] Figure 2 A schematic diagram of the test box panel of a test device for a power module tester of an audio / video recorder.

[0030] Figure 3 This is an electrical connection schematic diagram of a power module testing device for an audio / video recorder. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings. The present invention provides a rapid testing device for power modules, such as... Figure 1 As shown, the device includes a test box, connecting wires, and a spring test probe. The test box is connected to the connecting wires, which in turn are connected to the spring test probe. The spring test probe is connected to the power module under test. The test points of the power module under test are connected to the test box via connectors and connecting cables. The test is performed by operating the switches on the test box panel.

[0032] The test box described is as follows Figure 2As shown, it includes a voltage display module U1, a resistance display module R1, a voltage conversion module T1, a voltage converter D1, a rotary switch S1, a power indicator L1, and voltage divider resistors R2 and R3.

[0033] Example: Figure 3 As shown, when the power supply module under test is connected to this testing device via the spring test probe, the corresponding test points inside the power supply module under test are respectively connected to the rotary switch S1 in the test box, as shown. Figure 3 As shown. An external power supply provides 28V to the test box circuit and the power module under test. The positive and negative terminals of the power supply are connected to the voltage conversion module T1, the resistance display module R1, and X1 and X2, respectively. The voltage conversion module T1 is connected to the voltage display module U1, providing it with 5V operating power. The voltage test point and resistance test point of the power module under test are connected to the rotary switch S1. The rotary switch S1-1 is connected to the positive terminal of the voltage display module and the positive terminal of the voltage test hole. The power module under test X23 (DGND) is connected to the negative terminal of the voltage display module and the negative terminal of the voltage test hole. The rotary switch S1-3 is connected to the positive terminal of the resistance display module and the negative terminal of the voltage test hole. The resistance test port is positively connected. The power module under test X23 (DGND) is connected to the negative terminal of the resistance display module. One end of the power indicator L1 is connected to the negative terminal of the 28V power supply, and the other end is connected to X1. One end of the power switch S2 is connected to X1, and the other end is connected to the positive terminal of the 28V power supply. Pins 3 and 2 of the voltage converter D1 are connected to pin 4 of the voltage conversion module T1 and the rotary switch S1-2, respectively. Pins 5, 7, and 8 (DGND) of the voltage conversion module U1 are connected to pin 1 (DGND) of the voltage converter D1, the DGND of the voltage display module U1, and the GDND of the resistance display module, which are connected to the negative terminal of the 28V power supply.

[0034] Connect an external 28V power supply, press switch S2 to turn on the power, and the power indicator L1 will light up red. Rotate the knob switch S1. When the knob switch S1 is rotated to position 1, the tested power modules X22 (5V power signal positive) and X23 (GDNG) are connected to the positive and negative terminals of the voltage display module U1, respectively. At this time, the voltage display module U1 displays a 5V voltage, and the voltage test port can also measure a 5V voltage accordingly. When the knob switch S1 is rotated to position 2, the tested power modules X20 (>1.25V power signal positive) and X23 (GDNG) are connected to the positive and negative terminals of the voltage display module U1, respectively. At this time, the voltage displayed by the voltage display module U1 should be greater than 1.25V; the voltage test hole can also measure the voltage accordingly. When the knob switch S1 is rotated to position 3, the power supply module X14 under test is applied with a voltage of 3.3V, and X16 and X23 are connected to the positive and negative terminals of the resistance display module R1 respectively. At this time, the resistance displayed by the resistance display module R1 should be less than 300Ω, and the resistance test hole can also measure the resistance accordingly. When the knob switch S1 is rotated to position 4, the power supply module X14 under test is connected to GDNG, and X16 and X23 are connected to the positive and negative terminals of the resistance display module R1 respectively. At this time, the resistance display module... The resistance displayed by R1 should be greater than 1MΩ, and the resistance test hole should also be able to measure the resistance accordingly. When the knob switch S1 is rotated to position 5, the power module under test X15 is supplied with 3.3V, and X18 and X23 are connected to the positive and negative terminals of the resistance display module R1, respectively. At this time, the resistance displayed by the resistance display module R1 should be less than 300Ω, and the resistance test hole should also be able to measure the resistance accordingly. When the knob switch S1 is rotated to position 6, the power module under test X15 is connected to GDNG, and X18 and X23 are connected to the positive and negative terminals of the resistance display module R1, respectively. At this time, the resistance displayed by the resistance display module R1 should be greater than 1MΩ. The resistance test hole can also measure the resistance accordingly. When the knob switch S1 is rotated to position 7, the power module X7 under test is applied with a voltage of 3.3V. X8 and X23 are connected to the positive and negative terminals of the voltage display module U1, respectively. At this time, the voltage displayed by the voltage display module U1 should be greater than 3.3V, and the voltage test hole can also measure the voltage accordingly. When the knob switch S1 is rotated to position 8, the power module X7 under test is connected to GDNG, and X8 and X23 are connected to the positive and negative terminals of the voltage display module U1, respectively. At this time, the voltage displayed by the voltage display module U1 should be less than 0.4V, and the voltage test hole can also measure the voltage accordingly.

[0035] In summary, this utility model allows for the rapid testing of the recorder power module by operating the rotary switch S1, saving manpower, improving efficiency, and ensuring safety and reliability.

Claims

1. A testing device for a power module of an audio / video recorder, characterized in that: The device includes: a test box, wires, a spring test probe, and an external power supply; The test panel of the test box is equipped with a rotary switch, a voltage display module, and a resistance display module; the voltage display module and the resistance display module are connected to the spring test probes via the rotary switch and connecting wires; the spring test probes correspond one-to-one with the pins of the power supply module under test. The rotary switch is used to switch between different spring test probe pin combinations connected to the voltage display module and the resistance display module; the voltage display module is used to display the voltage between the pin combinations; the resistance display module is used to display the resistance between the pin combinations. An external power supply is used to power the test box.

2. The apparatus according to claim 1, characterized in that: The rotary switch is a four-layer, eight-position switch; The common terminal of the first layer is connected to the positive input terminal of the voltage display module; pin 1-1 of the first layer is connected to the 5V test positive terminal X22 of the power supply module under test; pin 1-2 of the first layer is connected to the power-down signal X20 of the power supply module under test; pins 1-7 and 1-8 of the first layer are simultaneously connected to the green light signal X8 of the power supply module under test. The common terminal of the second layer is connected to the output terminal of the 5 / 3 voltage conversion module; pin 2-3 of the second layer is connected to the fault signal one X14 of the power supply module under test; pin 2-5 of the second layer is connected to the fault signal two X15 of the power supply module under test; and pin 2-7 of the second layer is connected to the fault signal three X7 of the power supply module under test. The common terminal of the third layer is connected to the positive input terminal of the resistance display module; pins 3-3 and 3-4 of the third layer are simultaneously connected to the FDR fault signal X16 of the power supply module under test; pins 3-5 and 3-6 of the third layer are simultaneously connected to the CVR fault signal X18 of the power supply module under test. The common terminal of the fourth layer is grounded; pin 4-4 of the fourth layer is connected to the fault signal one X14 of the power module under test; pin 4-6 of the fourth layer is connected to the fault signal two X15 of the power module under test; and pin 4-8 of the fourth layer is connected to the fault signal three X7 of the power module under test. The negative input terminal of the voltage display module is connected to the ground of the power supply module under test; the negative input terminal of the resistance display module is connected to the ground of the power supply module under test.

3. The apparatus according to claim 2, characterized in that: The device also includes: a 28 / 5 voltage conversion module; The 28 / 5 voltage conversion module is used to convert an external 28V power supply to a 5V power supply and to power the voltage display module and the resistance display module.

4. The apparatus according to claim 3, characterized in that: The device also includes a power indicator light, which is a light-emitting diode. One end of the light-emitting diode is connected to the positive terminal X1 of the power supply and is also connected to an external 28V power supply. The other end of the light-emitting diode is grounded.

5. The apparatus according to claim 4, characterized in that: The device further includes: a voltage test port; The positive terminal of the voltage test hole is connected to the positive input terminal of the voltage display module, and the negative terminal of the voltage test hole is connected to the negative input terminal of the voltage display module.

6. The apparatus according to claim 5, characterized in that: The device further includes: a resistance test port; The positive terminal of the resistance test hole is connected to the positive input terminal of the resistance display module, and the negative terminal of the resistance test hole is connected to the negative input terminal of the resistance display module.

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