CN207424005U - A PCBA test fixture - Google Patents

Abstract

The utility model discloses a PCBA test fixture, include the anchor clamps mount pad and be fixed in the guide holder on the anchor clamps mount pad, the anchor clamps mount pad includes a test platform, test platform is equipped with the PCBA anchor clamps that are used for the fixed PCBA of clamping, be equipped with directly over the PCBA anchor clamps and compress tightly the piece, compress tightly fixedly connected with depression bar on the piece, the cover is equipped with the sleeve on the depression bar, the top of depression bar is rotated and is connected with the handle connecting portion, the one end that the depression bar was kept away from to the handle connecting portion articulates there is the handle, fixedly connected with connecting rod on the sleeve, the connecting rod with guide holder fixed connection, the bottom fixed connection of connecting rod the sleeve, the top of connecting rod with the articulated end of handle is articulated. The embodiment of the utility model provides a PCBA test fixture, simple structure, low cost, it is very simple and convenient to operate, and the clamping is firm, is applicable to the PCBA board of the various different specifications of test, and is very practical.

Description

A PCBA test fixture

technical field

The utility model relates to the technical field of PCBA testing, in particular to a PCBA testing fixture.

Background technique

PCBA (Printed Circuit Board Assembly, assembled printed circuit board), that is, PCB (Printed Circuit Board Assembly, printed circuit board) empty board passes through SMT (Surface Mount Technology, surface mount technology) upper part, and then passes through DIP (Dual In -line Package, also called dual in-line packaging technology) the circuit board after the plug-in.

After the PCBA is generated, it is generally necessary to test its circuit function to determine whether the PCBA is functioning normally. Most of the traditional PCBA tests use manual testing, with the help of testing tools (such as test pens), manual testing is required. This method requires manual wiring. Some interfaces have more pinholes, which need to be aligned before insertion. Usually, the PCBA board needs to be fixed first. Usually The best way is to press the board with one hand and connect with the other. The lines are complicated and confusing, the work intensity is high, and the efficiency is low.

Utility model content

The purpose of the utility model is to provide a PCBA test fixture to solve the above technical problems.

For this purpose, the utility model adopts the following technical solutions:

A PCBA test fixture, comprising a fixture mounting seat and a guide seat fixed on the fixture mounting seat;

The fixture mounting seat includes a test platform; the test platform is provided with a PCBA fixture for clamping and fixing the PCBA;

A pressing piece is provided directly above the PCBA fixture; a pressing bar is fixedly connected to the pressing piece; a sleeve is set on the pressing bar; the top of the pressing bar is rotatably connected to a handle connecting portion, A handle is hinged at the end of the handle connection part away from the pressure bar;

A connecting rod is fixedly connected to the sleeve, and the connecting rod is fixedly connected to the guide seat; the bottom end of the connecting rod is fixedly connected to the sleeve, and the top end of the connecting rod is connected to the hinged end of the handle hinged.

Optionally, the guide seat is provided with a guide rod installation part;

Both ends of the guide rod installation part are respectively fixedly connected with a guide rod; both of the guide rods are fixedly connected with the test platform, and are perpendicular to the top surface of the test platform;

The pressing member is sheathed on the two guide rods.

Optionally, the bottom end of the pressing rod is threadedly connected to the pressing member;

The bottom end of the pressing rod is also screwed with a fastening nut, and the fastening nut is fastened to the top surface of the pressing piece.

Optionally, the handle connection part includes two oppositely arranged "concave" handle connection parts;

One end of the handle connector is hinged to the handle, and the other end of the handle connector is rotatably connected to the top end of the pressure rod;

Wherein, the other end of the handle away from the holding portion is the hinged end of the handle.

Optionally, the fixture mounting seat also includes a bottom plate;

A plurality of supporting legs are provided between the base plate and the test platform; the two ends of the supporting legs are respectively connected to the top surface of the base plate and the bottom surface of the test platform; a plurality of the supporting legs are respectively arranged on the position of each corner of the bottom plate;

Lead holes are provided on the test platform, and the lead holes are arranged adjacent to the PCBA fixture.

Optionally, the handle is in an "L" shape;

One end of the handle is provided with a holding portion; the other end of the handle away from the holding portion is hinged to the top end of the connecting rod.

Optionally, the PCBA is provided with a first row of plugs and a second row of plugs, wherein the first row of plugs and the second row of plugs are interface connectors;

Several electronic components to be tested are electrically connected between the first socket and the second socket, and the detection item is used to detect the first socket, the second socket and each of the electronic components whether it is working properly;

The test button is electrically connected to the first row, and the indicator light is electrically connected to the second row.

Optionally, the PCBA is provided with a first row of plugs and a second row of plugs, wherein the first row of plugs and the second row of plugs are interface connectors;

Several electronic components to be tested are electrically connected between the first socket and the second socket; the test button is electrically connected to the first socket, and the indicator light is electrically connected to the second socket.

Optionally, the detection items include a first detection item, a second detection item, a third detection item, a fourth detection item, a fifth detection item, a sixth detection item, and a seventh detection item;

The test button includes a first key switch SB1, a second key switch SB2, a third key switch SB3, a fourth key switch SB4, a fifth key switch SB5, a sixth key switch SB6 and a seventh key switch SB7; the indication The lamps include a first LED lamp L1, a second LED lamp L2, a third LED lamp L3, a fourth LED lamp L4, a fifth LED lamp L5, a sixth LED lamp L6 and a seventh LED lamp L7;

The first electric contacts of the first key switch SB1, the second key switch SB2, the third key switch SB3, the fourth key switch SB4, the fifth key switch SB5, the sixth key switch SB6 and the seventh key switch SB7 are electrically connected +VCC power supply; the second electrical contact of the first key switch SB1 is electrically connected to the input end of the first detection item, and the second electrical contact of the second key switch SB2 is electrically connected to the second detection item The input end of the third key switch SB3, the second electrical contact of the third key switch SB3 is electrically connected to the input end of the third detection item, and the second electrical contact of the fourth key switch SB4 is electrically connected to the fourth detection item The input end of the fifth key switch SB5, the second electrical contact of the fifth key switch SB5 is electrically connected to the input end of the fifth detection item, and the second electrical contact of the sixth key switch SB6 is electrically connected to the sixth detection item The input terminal of the seventh key switch SB7 is electrically connected to the input terminal of the seventh detection item;

One end of the first LED light L1 is electrically connected to the output end of the first detection item, the other end of the first LED light L1 is grounded, one end of the second LED light L2 is electrically connected to the output end of the second detection item, and the third One end of the LED lamp L3 is electrically connected to the output end of the third detection item, one end of the fourth LED lamp L4 is electrically connected to the output end of the fourth detection item, and one end of the fifth LED lamp L5 is electrically connected to the fifth detection item. item, one end of the sixth LED lamp L6 is electrically connected to the output end of the sixth detection item, one end of the seventh LED lamp L7 is electrically connected to the output end of the seventh detection item, the second LED lamp L2, the first The other ends of the third LED light L3, the fourth LED light L4, the fifth LED light L5, the sixth LED light L6, and the seventh LED light L7 are all electrically connected to the input end of the first detection item;

Wherein, the first detection item is used to detect whether the first row is biased and open; the second detection item is used to detect whether the first row is reversed; the third detection item is used to detect Whether there is a pin short circuit between the first row of plugs and the second row of plugs; the fourth detection item is used to detect whether there is a false soldering open circuit between the first row of plugs and the second row of plugs ; The fifth detection item is used to detect whether each of the electronic components has a short circuit; the sixth detection item is used to detect whether each of the electronic components is reversed; the seventh detection item is used to detect each of the electronic components Whether the above electronic components are leaked.

Beneficial effects of the utility model: The PCBA test fixture provided by the embodiment of the utility model has simple structure, low cost, very simple operation, and reliable clamping. It is suitable for testing PCBA boards of various specifications and is very practical.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

FIG. 1 is a three-dimensional structure diagram of a PCBA test fixture provided by an embodiment of the present invention.

Fig. 2 is a partial circuit structure diagram of the PCBA provided by the embodiment of the present invention.

Fig. 3 is a schematic diagram of the test circuit of the PCBA test fixture provided by the embodiment of the present invention.

In the figure: 10, fixture mounting seat; 11, base plate; 12, test platform; 13, support foot; 121, lead hole; 122, test button; 123, indicator light; 20, guide seat; 21, guide rod installation part; 22. Guide rod; 23. Sleeve fixing part; 30. PCBA fixture; 40. Compression part; 41. Fastening nut; 50. Pressure rod; 51. Sleeve; 52. Connecting rod; 60. Handle; 61. Grip; 70. PCBA; 71. First row of plugs; 72. Second row of plugs.

Detailed ways

In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical solutions in the utility model embodiment will be clearly and completely described below in conjunction with the accompanying drawings in the utility model embodiment, Apparently, the embodiments described below are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The technical scheme of the utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments.

In the description of the present utility model, it should be noted that the orientations or positional relationships indicated by the terms "top", "bottom", "upper", "lower", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Please refer to FIG. 1, which is a three-dimensional structure diagram of the PCBA test fixture provided by the embodiment of the present invention.

The PCBA test fixture includes a fixture mounting base 10 and a guide base 20 ; the guide base 20 is fixedly connected to the fixture mounting base 10 .

The fixture mounting seat 10 includes a bottom plate 11 and a test platform 12 ; several support feet 13 of equal height are provided between the bottom plate 11 and the test platform 12 . Two ends of the supporting feet 13 are respectively connected to the top surface of the bottom plate 11 and the bottom surface of the test platform 12 . In this embodiment, the supporting feet 13 are arranged at corners of the bottom plate 11 .

Specifically, the test platform 12 is fixed with a PCBA fixture 30 for clamping and fixing the PCBA to be tested;

The test platform 12 is also provided with a PCBA test component, specifically, the PCBA test component includes a test button 122, an indicator light 123 and several wires. By touching the test button 122 and observing the on/off of the indicator light 123, it is very convenient to know whether the test item is passed.

Please continue to refer to FIG. 2. FIG. 2 is a partial circuit structure diagram of the PCBA provided by the embodiment of the present invention, which shows the circuit connection structure of the electronic components of the PCBA to be tested.

The PCBA is provided with a first row of plugs 71 and a second row of plugs 72, wherein the first row of plugs 71 and the second row of plugs 72 are interface connectors for providing the PCBA with an interface for connecting external devices or connecting external electronic components, It is inherent in the PCBA of this embodiment, and the interface connector belongs to the prior art, so its specific internal circuit structure will not be repeated in this embodiment.

Between the first row of sockets 71 and the second row of sockets 72 are electrically connected bidirectional conversion suppression diodes CR2 , CR3 , CR4 , CR5 , CR6 and an electrostatic protection diode D3 .

It should be noted that, as shown in FIG. 2 , the circuit connection relationship between the first row of plugs 71, the second row of plugs 72 and each electronic component is inherent in a PCBA provided by this embodiment. On other PCBAs, The corresponding circuit connections may be different, and the detected electronic components may also be of different types, which are not used to limit the specific implementation of the scheme of this embodiment, so the specific electrical connection relationships will not be repeated in this embodiment.

Taking the PCBA described in Figure 2 as an example, the functions to be tested by the PCBA test fixture in this embodiment include:

Detection item 1, whether the first row of plugs 71 is biased and open; detection item 2, whether the first row of plugs 71 is reversed; detection item 3, whether there are pins between the first row of plugs 71 and the second row of plugs 72 Short circuit; detection item 4, whether there is a false welding open circuit between the first socket 71 and the second socket 72; detection item 5, whether there is a short circuit in CR2, CR3, CR4, CR5, CR6 and D3; detection item 6, CR2, Whether CR3, CR4, CR5, CR6 and D3 are reversed; detection item 7, whether CR2, CR3, CR4, CR5, CR6 and D3 are missing. Among them, the test item 7 cannot be tested by using the existing computer-aided test method.

Please refer to FIG. 3 , which is a schematic diagram of the test circuit of the PCBA test fixture provided by the embodiment of the present invention.

In order to automate the test, some manufacturers in the market have begun to use computer-aided testing, that is, the PCBA needs to be electrically connected to the display, motherboard, keyboard, USB and other test accessories during the test, and the computer can automatically judge and reduce the probability of error; this method is designed The production is complicated, and the connection method of all parts of the whole machine needs to be designed to meet the test requirements. There are more connected parts, the fixture maintenance is complicated, the maintenance is difficult, and the production cost is high.

According to the above-mentioned detection items 1-7 that need to be tested, the indicator light 123 and the test button 121 are electrically connected to the corresponding interfaces of the first socket 71 and the second socket 72 through wires, so as to enable the corresponding detection through the test button 121 The operation of the item, whether the detection item is passed or not can be judged by observing the corresponding indicator light 123, which is very intuitive and easy to operate, which greatly improves the work efficiency.

At the same time, in order to speed up the test speed, the PCBA test fixture also includes a first plug compatible with the first row of sockets 71, and a second plug compatible with the second row of sockets 72; The lamp 123 is electrically connected to the two plugs. When testing, insert the first plug into the first socket 71 and the second plug into the second socket 72 to realize the connection of the test circuit.

Specifically, after the test circuit is connected, one electrical contact of the key switch SB1-SB7 is electrically connected to the positive output terminal of the power supply; Corresponding interface; one end of the LED lamp L1 is electrically connected to the corresponding interface of the second socket 72, the other end of the LED lamp L1 is electrically connected to the negative output terminal of the power supply, and one end of the LED lamps L2-L7 is electrically connected to each of the second socket 72. Corresponding to the interface, the other ends of the LED lamps L2 - L7 are parallel connected to a corresponding interface connected to the second socket 72 .

Among them, the test button 121 is a button switch, and the indicator light is an LED light; the detection item 1 corresponds to the LED light L1, and the test button 122 that turns on the detection item 1 corresponds to the key switch SB1; the detection item 2 corresponds to the indicator light L1 and the LED light L2, and the detection is turned on The test button 121 of item 2 corresponds to the key switch SB2; the test item 3 corresponds to the indicator light L1 and the LED light L3, and the test button 121 of the test item 3 corresponds to the key switch SB3; the test item 4 corresponds to the indicator light L1 and the LED light L4, and the test is turned on The test button 121 of item 4 corresponds to the key switch SB4; the test item 5 corresponds to the indicator light L1 and the LED light L5, and the test button 121 of the test item 5 corresponds to the key switch SB5; the test item 6 corresponds to the indicator light L1 and the LED light L6, and the test is turned on The test button 121 of item 6 corresponds to the key switch SB6; the test item 7 corresponds to the LED lamp L1 and the LED lamp L7, and the test button 121 for turning on the test item 7 corresponds to the key switch SB7.

In this embodiment, when the corresponding test button 121 is pressed, only when the indicator light 123 corresponding to the detection item is all on, it indicates that the test result is passed; otherwise, less or more light indicates that the test result is not passed. The function of detecting the PCBA is realized by controlling the indicator light 123, which makes the testing process more intuitive and does not increase the cost of the fixture too much.

Specifically, the wires can be uniformly placed between the test platform 12 and the bottom plate 11 through the lead hole 121, so that the test platform is more tidy.

Please continue to refer to Fig. 1, specifically, the guide seat 20 is provided with a guide rod installation part 21, and the two ends of the guide rod installation part 21 are respectively fixedly connected with a guide rod 22; the two guide rods 22 are all perpendicular to the top surface of the test platform 12 Set, and fixedly connected with the test platform 12.

The guide rod 22 is movably connected with a pressing member 40, and the pressing member 40 is provided with two guide holes matching the guide rod 22; the pressing member 40 is sleeved on the two guide rods 22 through the two guide holes.

The compression member 40 is fixedly connected with a compression rod 50; the bottom end of the compression rod 50 is provided with an external thread, the bottom end of the compression rod 50 is threaded with the compression member 40, and the bottom end of the compression rod 50 is also threaded with a fastening nut 41. The fastening nut 41 is used to further ensure the stability of the fixed connection between the pressing rod 50 and the pressing member 40.

Sleeve 51 is sleeved on depression rod 50, and depression rod 50 can be movable on vertical direction (direction perpendicular to the top surface with test platform 12) along sleeve 51; Sleeve 51 is fixedly connected with connecting rod 52; A sleeve fixing part 23 is also provided on the base 20; the connecting rod 52 is fixedly connected with the sleeve fixing part 23. Wherein, the connecting rod 52 and the sleeve fixing member 23 are fixedly connected, and the sleeve 51 and the sleeve fixing member 23 can also be fixedly connected instead, which can realize fixing between the sleeve 51 and the guide seat 20 .

The top of the pressure rod 50 is rotatably connected with a handle connection part 53; the end of the handle connection part 53 away from the pressure rod 50 is hinged with an "L"-shaped handle 60, and the handle 60 is provided with a grip part 61; the bottom end of the connecting rod 52 The sleeve 51 is fixedly connected, and the top end of the connecting rod 52 is hinged to the hinged end of the handle 60 . Wherein, the hinged end of the handle 60 is the end of the handle 60 away from the grip portion 61, that is, the lower end of the handle 60 in FIG. 1 .

Specifically, the handle connecting part 53 includes two oppositely arranged handle connecting parts in the shape of a "concave" shape. One end of the handle connecting part is hinged to the handle 60 , and the other end of the handle connecting part is rotatably connected to the top end of the pressing rod 50 .

At the initial position, the holding part 61 of the handle 60 and the connecting rod 52 are located on the same side of the pressure rod 50, and the hinge of the connecting rod 52 and the handle 60 is located below the holding part 61; the PCBA to be tested is clamped on the PCBA fixture 30 Rotate the handle 60 in a predetermined direction (arrow direction shown in Figure 1), and the connecting rod 52 is lifted upwards. Since the connecting rod 52 is fixed, the downward reaction force of the connecting rod 52 acting on the depression rod 50 drives the depression rod 50 moves down along the sleeve 51, and then drives the pressing member 40 to move downward, and is accurately pressed against the PCBA through the guidance of the guide rod 22, until it rotates at a predetermined angle, and the pressing member 40 collides and presses the PCBA. In this embodiment, the predetermined angle is 180 degrees, and the hinge of the connecting rod 52 and the handle 60 will rotate above the connecting portion of the handle.

After the test, when the PCBA needs to be unloaded from the PCBA fixture 30, the handle 60 is turned in the opposite direction to the above-mentioned predetermined direction to keep the pressing member 40 away from the PCBA, and then the PCBA can be taken out, which is very convenient.

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it still can Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present utility model .

Claims (9)

1. A PCBA test fixture, is characterized in that, comprises fixture mounting seat (10) and is fixed on the guide seat (20) on the fixture mounting seat (10); The fixture mount (10) includes a test platform (12); the test platform (12) is provided with a PCBA fixture (30) for clamping and fixing the PCBA; A pressing piece (40) is provided directly above the PCBA fixture (30); a pressing bar (50) is fixedly connected to the pressing piece (40); a sleeve is sleeved on the pressing bar (50) (51); the top end of the pressure rod (50) is rotatably connected with a handle connection part (53), and the handle connection part (53) is hinged with a handle (60) at an end away from the pressure rod (50); A connecting rod (52) is fixedly connected to the sleeve (51), and the connecting rod (52) is fixedly connected to the guide seat (20); the bottom end of the connecting rod (52) is fixedly connected to the sleeve The cylinder (51), the top end of the connecting rod (52) and the hinged end of the handle (60) are hinged. 2. PCBA test fixture according to claim 1, is characterized in that, described guide seat (20) is provided with guide rod mounting part (21); The two ends of the guide rod mounting part (21) are respectively fixedly connected with a guide rod (22); the two guide rods (22) are fixedly connected with the test platform (12), and are perpendicular to the test platform (12). the top surface of the platform (12); The pressing member (40) is sheathed on the two guide rods (22). 3. PCBA test fixture according to claim 1, is characterized in that, the bottom end of described pressure rod (50) is threadedly connected with described pressing member (40); The bottom end of the pressing rod (50) is also threaded with a fastening nut (41), and the fastening nut (41) is fastened to the top surface of the pressing piece (40). 4. PCBA test fixture according to claim 1, is characterized in that, described handle connection part (53) comprises two oppositely arranged handle connectors in the shape of "concave"; One end of the handle connector is hinged to the handle (60), and the other end of the handle connector is rotatably connected to the top end of the pressing rod (50). 5. PCBA test fixture according to claim 1, is characterized in that, described fixture mount (10) also comprises base plate (11); A plurality of support legs (13) are provided between the base plate (11) and the test platform (12); the two ends of the support legs (13) are respectively connected to the top surface of the base plate (11) and the The bottom surface of the test platform (12) is connected; a plurality of said supporting feet (13) are respectively arranged at each corner position of said bottom plate (11); A lead hole (121) is opened on the test platform (12), and the lead hole (121) is arranged adjacent to the PCBA fixture (30). 6. PCBA test fixture according to claim 1, is characterized in that, described handle (60) is " L " shape; One end of the handle (60) is provided with a grip portion (61); the other end of the handle (60) away from the grip portion (61) is hinged to the top end of the connecting rod (52); Wherein, the other end of the handle (60) away from the holding portion (61) is the hinged end of the handle (60). 7. PCBA test fixture according to claim 1, is characterized in that, also be provided with PCBA test assembly on described test platform (12); Described PCBA test assembly is electrically connected PCBA; The test component includes a test button (122) for starting the detection item and an indicator light (123) for displaying the test result of the detection item. 8. The PCBA test fixture according to claim 7, characterized in that, the PCBA is provided with a first row of sockets (71) and a second row of sockets (72), wherein the first row of sockets (71) ) and the second row plug (72) are interface connectors; Several electronic components to be tested are electrically connected between the first socket (71) and the second socket (72), and the detection item is used to detect the first socket (71), the second socket Whether the two row plugs (72) and each of the electronic components are working normally; The test button (122) is electrically connected to the first socket (71), and the indicator light (123) is electrically connected to the second socket (72). 9. PCBA test fixture according to claim 8, is characterized in that, described detection item comprises the first detection item, the second detection item, the 3rd detection item, the 4th detection item, the 5th detection item, the 6th detection item. The detection item and the seventh detection item; The test button (122) includes a first key switch SB1, a second key switch SB2, a third key switch SB3, a fourth key switch SB4, a fifth key switch SB5, a sixth key switch SB6 and a seventh key switch SB7; The indicator light (123) includes a first LED light L1, a second LED light L2, a third LED light L3, a fourth LED light L4, a fifth LED light L5, a sixth LED light L6 and a seventh LED light L7; The first electric contacts of the first key switch SB1, the second key switch SB2, the third key switch SB3, the fourth key switch SB4, the fifth key switch SB5, the sixth key switch SB6 and the seventh key switch SB7 are electrically connected +VCC power supply; the second electrical contact of the first key switch SB1 is electrically connected to the input end of the first detection item, and the second electrical contact of the second key switch SB2 is electrically connected to the second detection item The input end of the third key switch SB3, the second electrical contact of the third key switch SB3 is electrically connected to the input end of the third detection item, and the second electrical contact of the fourth key switch SB4 is electrically connected to the fourth detection item The input end of the fifth key switch SB5, the second electrical contact of the fifth key switch SB5 is electrically connected to the input end of the fifth detection item, and the second electrical contact of the sixth key switch SB6 is electrically connected to the sixth detection item The input terminal of the seventh key switch SB7 is electrically connected to the input terminal of the seventh detection item; One end of the first LED light L1 is electrically connected to the output end of the first detection item, the other end of the first LED light L1 is grounded, one end of the second LED light L2 is electrically connected to the output end of the second detection item, and the third One end of the LED lamp L3 is electrically connected to the output end of the third detection item, one end of the fourth LED lamp L4 is electrically connected to the output end of the fourth detection item, and one end of the fifth LED lamp L5 is electrically connected to the fifth detection item. item, one end of the sixth LED lamp L6 is electrically connected to the output end of the sixth detection item, one end of the seventh LED lamp L7 is electrically connected to the output end of the seventh detection item, the second LED lamp L2, the first The other ends of the third LED light L3, the fourth LED light L4, the fifth LED light L5, the sixth LED light L6, and the seventh LED light L7 are all electrically connected to the input end of the first detection item; Wherein, the first detection item is used to detect whether the first plug-in row (71) is biased and open; the second detection item is used to detect whether the first plug-in row (71) is reversed; The three detection items are used to detect whether there is a pin short circuit between the first socket row (71) and the second socket row (72); the fourth detection item is used to detect the first socket row (71) ) and the second socket (72) whether there is a false welding open circuit; the fifth detection item is used to detect whether there is a short circuit in each of the electronic components; the sixth detection item is used to detect each of the electronic components Whether the component is placed in reverse; the seventh detection item is used to detect whether each of the electronic components is missing.