TWM585904U - A circuit troubleshooting system - Google Patents

Abstract

A circuit troubleshooting system, including a graphical user interface program, a nodal electrical characteristic table, an artificial intelligence logic, a computer platform, a power and signal generator, a set of measuring equipment, and an editable maintenance note. The nodal electrical characteristic table records the electrical characteristics of each node on the target circuit under test, such as but not limited to the voltage, current, frequency...etc. The nodal electrical characteristic table also shows the meanings of common error signals, the correlation between nodes, and user guides to troubleshooting. The computer platform executes the graphical user interface program, which provides a graphical user interface for operation, manages system access permissions for different maintainers, and records the testing results logged by the maintainer. The graphical user interface program can operate on three modes to test a target circuit: a default general testing mode that tests multiple circuit functions, a specific testing mode that examines any one specific circuit function, and a manual component-testing mode that examines circuit components. The graphical user interface program guides the maintainer to feed necessary power and signal from the power and signal generator into the target circuit. The graphical user interface program then records the input and output signals of the target circuit with the measuring equipment. The artificial intelligence logic then uses the data to determine if the target circuit is operating correctly. If the target circuit is found to be operating incorrectly, the graphical user interface program first commands the power and signal generator to feed necessary power and signal into the target circuit, then guides the maintainer to measure the electrical characteristics of specific nodes with the measuring equipment. The graphical user interface program then diagnoses possible malfunctioning components using the artificial intelligence logic, according to the measured electrical characteristics data. The artificial intelligence logic analyzes the electrical characteristics data as it is collected, so that the possibilities of malfunctioning components can be narrowed down with each measurement. This enables the maintainer to locate and remove the malfunctioning component efficiently. This system additionally displays the circuit diagram, schematic diagram, and actual photos of the target circuit, and also briefly explains the circuit diagram of the target circuit with simple icons, making it easier for the maintainer to locate each node they intend to measure. The graphical user interface program saves the nodal electrical characteristic data table, and provides the maintainer with electrical characteristics data of correctly functioning nodes for comparison. The graphical user interface program also presents the maintainer with a menu of malfunction suggestions and corresponding troubleshooting steps, using simple icons that the maintainer can select and directly initiate a troubleshooting process. The graphical user interface program also allows the maintainer to create and edit maintenance notes for each node, to keep track of maintenance history.

Description

Circuit maintenance system

This creation is a circuit maintenance system, which is used to automatically determine whether the circuit is operating normally and to improve the speed of circuit troubleshooting. This creation has a computer platform that can run a graphical operation interface to guide the maintenance personnel to use appropriate power and signal feedback. Enter the circuit board under test and measure the input and output signals of the circuit board under test, and automatically determine whether the circuit is operating normally. At the same time, the system can display the circuit diagram or schematic diagram of the circuit board under test, and a physical photo, and its correlation It is convenient for the maintenance personnel to measure the electrical characteristics of the circuit nodes with measuring equipment. When the circuit is abnormal, the maintenance personnel will be guided to measure the circuit nodes step by step to reduce the scope of components that may be faulty. In the process, the maintenance personnel can graphically click to establish and Edit the maintenance notes of each circuit node and accumulate maintenance experience.

Traditional circuit board maintenance work must feed the correct power source and signal source to the circuit board under test with various electronic instruments, such as power supplies, function wave generators, etc. The maintenance personnel then decide to measure the circuit diagram according to the circuit principle Which circuit nodes, then find the position of the circuit node to be measured on the actual circuit board to be measured, perform electrical characteristic measurement, and then determine whether the signal of the circuit node is correct according to the measured signal against the circuit principle, If the signal of the circuit node is not correct, the maintenance personnel must judge the cause of the fault signal according to the circuit principle, and continue its measurement, comparison and inference Work and can gradually narrow down the scope of possible faulty components, and finally find the truly faulty component or line to complete the maintenance work. Therefore, traditional circuit board maintenance personnel must have sufficient knowledge of circuit principles in order to determine which signal source to feed in during the maintenance work, and determine the next maintenance step based on the electrical characteristics of the measured circuit nodes, and iterate and measure repeatedly. Only then can the component or line that is really faulty be determined, so the maintenance personnel must repeatedly check the actual position of the circuit node to be measured on the circuit board under test in the circuit diagram. This repeated comparison will make the maintenance work slow.

Because the same batch of circuit boards under test have similar or identical circuit diagrams and component materials, and the environments used are usually similar or identical, the faulty components or circuits are often the same or similar, but only in the traditional maintenance process. Depending on the maintenance personnel's own records, maintenance experience is difficult to accumulate or transfer.

In addition, during the maintenance process, the maintenance personnel must repeatedly cross-reference between the circuit diagram and the circuit board to find out the actual position of the circuit node to be measured in the circuit board to be tested, which is quite time-consuming and troublesome.

Another conventional circuit board automatic maintenance system is to design a dedicated elastic probe matrix for the circuit board to be tested. The position of the probe is the circuit node to be measured, and then the circuit board to be tested is pressed on the elastic probe. The probe and the circuit node are connected to each other on the needle. The probe is connected with the necessary power source, signal source and measuring circuit or instrument, and is fed into the probe and measured by a program on the computer or microprocessor system. The electrical signals of the probes. These electrical signals can be judged by the rules written beforehand to determine whether the electronic components and circuits are normal. However, this method is usually only suitable for quality control during the production of circuit boards, because the circuit boards that are returned for repair are usually coated with waterproof Adhesive film, the elastic probe is difficult to penetrate the insulation The adhesive film is in contact with the circuit nodes, so such an automatic circuit board maintenance system will be difficult to apply. In contrast, a hand-held test rod can use a pointed needle to directly pierce the film manually to measure the circuit node.

The structure of this creation is shown in Figure 1. It includes: a graphical interface program, a node electrical characteristic data table, an artificial intelligence logic, a computer platform, a test power source and signal source, a measuring device and a maintenance note. The node electrical characteristics data sheet records the correct electrical characteristics of the circuit node, such as voltage, current, wave shape, frequency, etc., and records the meaning of abnormal signals common to the circuit node, the correlation between different circuit nodes, and faults. Excluded guidelines and other information, the computer platform can be used to execute the graphical interface program to provide a graphical operation interface for the maintenance personnel, to manage the measurement authority that the maintenance personnel can operate, to record the items measured by the maintenance personnel, etc. There are three modes of overall function test, single function test and component maintenance test, which can guide the maintenance personnel to feed the power and test signals generated by the test power source and signal source to the circuit board under test, and use the measurement equipment to measure the input of the circuit Output the signal, and then judge whether the circuit is normal according to the artificial intelligence logic. When the circuit appears When abnormal, the graphic interface program will direct the test power source and signal source to generate the necessary power and test signals to enter the circuit board under test and guide the maintenance personnel to gradually measure some specific circuit nodes with the measurement equipment. The program will be based on the measured The obtained electrical signals use the artificial intelligence logic to judge possible fault points, and gradually narrow down the range of possible faulty components to help users correctly judge the faulty components or lines of the circuit.

The system can display the circuit diagram or schematic diagram of the circuit board under test, and the physical phase And graphically display the comparison relationship, which is convenient for the maintenance personnel to find the location of the circuit node to be measured on the circuit board under test. The graphical interface program can access the electrical characteristics data table of the node and display the correct electrical characteristics of the circuit node It is provided for maintenance personnel to compare, and can display the meaning of abnormal signals common to each circuit node and the troubleshooting guideline in the way of graphical selection. It helps the maintenance personnel to quickly remove the circuit fault. Maintenance notes, accumulated maintenance experience.

11‧‧‧ Graphic Interface Program

12‧‧‧node electrical characteristics data sheet

13‧‧‧ Artificial Intelligence Logic

14‧‧‧Computer Platform

15‧‧‧test power and signal source

16‧‧‧ measuring equipment

17‧‧‧ overhaul notes

18‧‧‧Circuit board under test

21‧‧‧ boot test screen

22‧‧‧ boot test screen

23‧‧‧ Step by step measurement circuit node

24‧‧‧ Fault judgment icon

25‧‧‧ frame icon

26‧‧‧Outer frame icon

31‧‧‧Circuit Frame

32‧‧‧Photo Frame

33‧‧‧ frame icon

34‧‧‧ frame icon

41‧‧‧Circuit Frame

42‧‧‧ Correct electrical characteristics frame

43‧‧‧ Editing frame

44‧‧‧ frame icon

Figure 1 is a system architecture diagram of the creation, and Figure 2 is an embodiment of gradually reducing possible failure points.

FIG. 3 is an embodiment of the graphic interface program displaying a circuit diagram or a schematic diagram of a circuit board to be tested, and a physical photo

Figure 4 is an embodiment of the graphical interface program showing the correct electrical and editing maintenance notes that a circuit node should have under normal operation.

The system architecture diagram of this creation is shown in Figure 1. It includes: a graphical interface program 11, a node electrical characteristic data table 12, an artificial intelligence logic 13, a computer platform 14, a test power source and a signal source 15, a quantity Test equipment 16 and a maintenance note 17, wherein the node electrical characteristics data sheet 12 records the correct electrical characteristics of the circuit node, such as voltage, current, wave shape, frequency, etc., and records the meaning of the abnormal signals common to the circuit node. Correlation between different circuit nodes, troubleshooting guidelines, etc. The computer platform 14 can be used to execute the graphical interface program 11 and its composition can be Considered as a conventional computer host or a dedicated embedded system, the computer platform 14 has a conventional graphical display device such as a screen, a touch screen, a keyboard, a mouse and other user operation interfaces.

The node electrical characteristics data table 12 is the information recorded on the computer platform 14, and its recording form may be in the form of a known database system, text table, table array of code, etc., and its recording content includes: the correct electrical of each circuit node Characteristics (such as voltage, current, wave shape, frequency, etc.), the meaning of abnormal signals common to each circuit node, the correlation between different circuit nodes, troubleshooting guidelines, and other information make this graphical interface program 11 to facilitate access to its data.

The test power source and signal source 15 can provide the voltage and current sources required for servicing the circuit board, and can also provide the signal sources required for servicing the circuit board. The method of generating these power sources and signal sources can be provided by the instrument manufacturer. The power supply equipment or signal source equipment can also be electronic circuit equipment designed specifically for the circuit board under test. The test power source and signal source 15 are electrically connected to the computer platform 14 and can be controlled by the graphical interface program 11. Set the form and timing of the output signal. The test power source and signal source 15 are designed with input and output interfaces suitable for the circuit board 18 under test, which can be physically connected to the circuit board 18 under test, so as to be able to follow the graphics interface program. The test flow of 11 feeds the required power and signal source into the circuit board 18 under test for maintenance.

The measuring device 16 can measure the electrical characteristics of the circuit board 18 to be measured, such as voltage, current, wave shape, frequency, etc., and the measurement location includes the complete input, output signals and individual circuits of the circuit board 18 to be tested. Nodes, etc., the measurement equipment 16 may be a commercially available measurement instrument, or an electronic circuit specially designed for a specific circuit board to be tested. The device 16 is electrically connected to the computer platform 14 and can be controlled by the graphic interface program 11. Therefore, the measurement result can be read by the graphic interface program 11. The measurement device 16 is designed to be suitable for the circuit board 18 to be tested. The input and output interfaces can be physically connected to the circuit board 18 to be tested, so that the electrical signals of the circuit board 18 to be read can be read along with the operating procedures and stages of the graphical interface program 11. At the same time, the measurement device 16 is designed to be handheld. Probes or test rods in the form of a conventional single test rod or a variety of circuit fixtures, convenient for maintenance personnel to measure the electrical signals of the circuit nodes on the circuit board 18 under test, and these probes or The test rod can be designed with a sharp probe so that the maintenance personnel can force the insulation coating or even plastic on the circuit board 18 to be tested for electrical signal measurement.

The artificial intelligence logic 13 is information recorded on the computer platform 14, and the recording form may be a conventional database system, text table, code array, etc. The recorded content includes the circuit board 18 to be tested during operation. The power supply and signal source provided, the steps and processes for testing the circuit board, and the corresponding relationship between the input and output of the circuit board 18 under normal function. The graphical interface program 11 can access the artificial intelligence logic 13 to test the circuit. The board 18 performs a series of automatic test procedures, and the graphical interface program 11 can be suspended at a specific test step of a series of test procedures according to the record of the artificial intelligence logic 13 or manually decide to perform the next test step, or Return to the previous test step. This function is particularly useful when the input-output correspondence of the circuit board 18 to be tested has sequence dependence or data dependence. The maintenance staff can set the test procedure to a specific test step and pause it. In order to observe or exclude the circuit board under a specific combination of input conditions or a specific operating sequence Iso circuit often.

The artificial intelligence logic 13 also records the test steps and processes when the circuit board 18 to be tested is abnormal. The graphical interface program 11 can guide the maintenance personnel to use the measuring device 16 to perform a series of electrical measurement of the circuit nodes. The artificial intelligence logic 13 records the judgment logic for repairing the circuit board 18 to be tested. When the circuit board under test finds a failure during the test, the graphical interface program 11 can be based on the electrical characteristics data table 12 of the node and the artificial intelligence logic. The record of 13 guides the maintenance personnel to measure the electrical signals of each circuit node, and gradually narrows down the range of components that may be faulty, helping users correctly judge the faulty components or circuits of the circuit. This process can be a step-by-step measurement of human-computer interaction. It is also possible to determine the fault location after measuring each circuit node in batches. Figure 2 is an embodiment. The graphical interface program 11 displays a guide test screen 21 and displays a circuit node 25 in the frame. Physical location. When the measurement personnel completes this measurement with the measurement device 16, the graphical interface program 11 then displays a guide test picture. 22 To guide the measuring person to measure the next circuit node, the guidance test screen 22 displays the physical position of the circuit node in the outer frame icon 26, as in the guidance test screen 21 and the guidance test screen 22, the measurement circuit is guided step by step. After the program of the node 23, the graphical interface program 11 can be used to judge the faulty component or line of the circuit board to be tested, and it is displayed by the fault judgment icon 24.

The graphical interface program 11 provides a graphical operation interface for the maintenance personnel, and can manage the account and password of the maintenance personnel. The program can define the measurement items that the maintenance personnel can operate according to the account and password, and the program can also record the maintenance personnel's login system. Time and measurement items.

The graphic interface program 11 has three modes: overall function test, single function test and component maintenance test. The program will take the test power and signal source 15, the measurement device 16 and the circuit board 18 to be tested, or their equivalent photos. It is displayed on the screen and guides the maintenance personnel to make a physical electrical connection.

When the graphic interface program 11 works in the overall function test mode, the program will feed the necessary test power and signal source to the circuit board under test 18 according to the records of the artificial intelligence logic 13, and according to the circuit board recorded in the artificial intelligence logic 13. The test steps and processes automatically perform the overall function test of the circuit board 18 under test. During the test, the graphical interface program 11 will also access the node's electrical characteristics data table 12 to determine whether the circuit is normal. When the circuit function is abnormal, the graphical interface Formula 11 can pause or skip specific test steps according to the records of the artificial intelligence logic 13, so as not to generate meaningless test data or continue to input test signals in the event of a circuit failure, but further expand the scope of the failure. The test procedure of this overall function test also has the functions of manual pause, manual stop, fixed-point pause, single-step forward, single-step backward, or conditional pause based on the measurement signal, so that the maintenance personnel can make the circuit board at any time as needed I / O stays in a specific state and can be graphically manipulated by graphical operations at any time Access member 11 into the test mode.

When the graphic interface program 11 works in the single function test mode, testers can click on the graphic interface program 11 to select and perform the single function test of the circuit board under test. The program will compare the artificial intelligence with the selected test function. The description of logic 13 feeds the necessary test power and signal source to the circuit board 18 under test, and performs the test of the circuit board 18 under test according to the circuit board test steps and procedures described in the artificial intelligence logic 13. Single function test. During the test, the graphic interface program 11 will also access the node electrical characteristics data table 12 to determine whether the circuit is normal. When the circuit function is abnormal, the graphic interface program 11 can be based on the records of the artificial intelligence logic 13. Pause or skip specific test steps, so as not to generate meaningless test data or to continue to input test signals in the event of a circuit fault, but to further expand the scope of the fault. On the other hand, the test procedure for this single function test also has manual Pause, manual stop, fixed-point pause, single-step forward, single-step backward, or conditional pause based on the measurement signal, so that maintenance personnel can keep the input and output of the circuit board in a specific state at any time and can The graphic operation changes the graphic interface program 11 into a component overhaul test mode.

When the graphic interface program 11 works in the component overhaul test mode, the program will display the circuit diagram or schematic diagram of the circuit board under test, and a physical photo, and display the comparison relationship with the icon, which is convenient for the maintenance personnel to find on the circuit board 18 under test. The position of the circuit node to be measured. The graphic interface program 11 also has a graphic interface to allow the maintenance personnel to select the power and signal source to be input to the circuit board 18 to be tested. At this time, the maintenance personnel can use the detection provided by the measurement device 16 Use a pin or test rod to measure the circuit node. The measured electrical signals will be displayed on the operation screen. On the other hand, the graphical interface program 11 will access the node's electrical characteristics data table 12 and display the correct electrical of each circuit node. Features In the operation screen for maintenance personnel to compare, the graphical interface program 11 can also display the meaning and troubleshooting guidelines of the abnormal signals common to each circuit node by clicking on the icon to help the maintenance personnel quickly troubleshoot the circuit.

The node electrical characteristics data table 12 and the artificial intelligence logic 13 are established by engineers who understand the operation of the circuit board under test. For the maintenance personnel using this system, there is no Need to understand in detail, as long as the measurement steps prompted by the graphical interface program 11 can perform circuit troubleshooting.

The maintenance note 17 is information recorded on the computer platform 14, and the recording form can be a known database system, text table, code array, etc. The maintenance personnel can create and edit each circuit node by clicking and clicking. Maintenance notes 17, accumulated maintenance experience, when the graphical interface program 11 works in the component maintenance test mode, it can display the contents of the maintenance notes 17 of each circuit node, to help maintenance personnel quickly find the faulty component or circuit from the past maintenance experience

Figure 3 shows an example of the graphical interface program 11 showing the circuit diagram or schematic diagram of the circuit board under test, and an example of a physical photo. The operation screen will have a circuit diagram frame 31 showing the circuit diagram or schematic diagram of the circuit board under test, and The other photo frame 32 shows the physical photo of the circuit board under test, and its comparison relationship is displayed as an icon. After the maintenance personnel selects specific electronic components on the circuit frame 31 on the outer frame icon 33, the graphical interface program 11 will be displayed at the same time. The physical picture of the circuit board to be tested is displayed in the photo frame 32, and the same specific electronic component is marked with a frame icon 34 in the physical photo.

Figure 4 shows an example of the graphical interface program 11 showing the correct electrical and editing maintenance notes 17 that the circuit node should have under normal operation. The operation screen will have a circuit diagram box 41 showing the circuit diagram or principle of the circuit board under test. The diagram shows the circuit diagram or schematic of the circuit board under test, a correct electrical characteristic diagram box 42 shows the normal electrical of the circuit node The characteristics and an edited frame 43 allow the maintenance person to edit the maintenance notes 17, after the maintenance personnel selects a specific circuit node on the circuit frame 41 outside the frame icon 44, the correct electrical characteristics at the same time will show the normal electrical characteristics of the circuit node in the frame 42 Characteristic, editing picture frame 43 allows the maintenance personnel to edit the maintenance note 17 of the circuit node.

Claims (8)

A circuit maintenance system includes: a graphical interface program, a node electrical characteristic data table, an artificial intelligence logic, a computer platform, a test power source and signal source, a measuring device and a maintenance note, the node electrical characteristic data table Record the correct electrical characteristics of the circuit nodes, such as voltage, current, wave shape, frequency, etc., and record the meaning of the abnormal signals common to the circuit nodes, the correlation between different circuit nodes, troubleshooting guidelines, and other information. The computer The platform can be used to execute the graphical interface program to provide a graphical operation interface for the maintenance personnel, to manage the measurement permissions that the maintenance personnel can operate, to record the items measured by the maintenance personnel, etc. The graphical interface program has overall functional testing and single functional testing And component maintenance test three modes, which can guide maintenance personnel to feed the power and test signals generated by the test power source and signal source to the circuit board under test, and measure the input and output signals of the circuit with the measurement equipment, and then according to the artificial intelligence Logic to judge whether the circuit is normal, the figure when the circuit is abnormal The surface program will direct the test power source and signal source to generate the necessary power and test signals to enter the circuit board under test and guide the maintenance staff to gradually measure certain specific circuit nodes with the measurement equipment. The graphical interface program will be based on the measured The electrical signals are judged by the artificial intelligence logic and the electrical characteristics data sheet of the node to the possible failure points, and gradually narrow down the range of possible failure components to help users correctly judge the faulty components or circuits of the circuit. The graphical interface program can display the The circuit diagram or schematic diagram of the circuit board, and the physical photos, and the comparison relationship is displayed graphically, so that the maintenance personnel can find the location of the circuit node to be measured. The graphical interface program can access the node's electrical characteristics data table and display the circuit node's The correct electrical characteristics are provided for maintenance personnel to compare, and can show the meaning and troubleshooting guidelines of abnormal signals common to each circuit node, helping the maintenance personnel to quickly remove circuit faults. The maintenance personnel can click to create and edit the maintenance notes of each circuit node. , Accumulate maintenance experience. For example, the circuit maintenance system of claim 1, wherein the computer platform can be used to execute the graphic interface program, and its composition can be a conventional host or a dedicated embedded system. The computer platform has a conventional graphic display device such as a screen, User interface such as touch screen, keyboard, mouse, etc. For example, the circuit maintenance system of claim 1, wherein the test power source and signal source can provide the voltage and current sources required for servicing the circuit board, and at the same time can provide the signal source required for servicing the circuit board. The method of generating these power sources and signal sources can be The conventional power supply or signal source equipment provided for the instrument manufacturer may also be an electronic circuit device specially designed for a specific circuit board under test. The test power source and signal source are electrically connected to the computer platform and may be controlled by the computer platform. Controlled by a graphic interface program to set the signal form and output timing of its output. The test power and signal source are designed with input and output interfaces suitable for the circuit board under test, which can be physically connected to the circuit board under test, so that it can follow the graphics. The operating procedures and phases of the interface program feed the required power and signal sources into the circuit board under test for maintenance. For example, the circuit maintenance system of claim 1, wherein the node electrical characteristic data table is information recorded on the computer platform, and the recording form may be a known database system, text table, code array, etc. Have the correct electrical characteristics of each circuit node, such as voltage, current, wave shape, frequency, the meaning of the abnormal signals common to each circuit node, the correlation between different circuit nodes, troubleshooting guidelines, and other information to make this graph Interface programs provide easy access to their data. For example, the circuit maintenance system of claim 1, wherein the measuring device can measure the electrical characteristics of the circuit board under test, such as voltage, current, wave shape, frequency, etc., and the measurement part includes the complete input and output of the circuit board under test. Signals and individual circuit nodes, etc., the measurement device can be a commercially available measurement instrument, or an electronic circuit designed specifically for a specific circuit board to be tested. The measurement device is electrically connected to the computer platform and can be controlled by The graphic interface program controls, so the measurement results can be read by the graphic interface program. The measuring device is designed with input and output interfaces suitable for the circuit board under test, which can be physically connected to the circuit board under test, so that Read the electrical signals of the circuit board to be tested with the operation process and stage of the graphic interface program. At the same time, the measuring device is designed with a handheld probe or test rod, which can be a conventional single test rod or It is a variety of circuit fixtures, which is convenient for the maintenance personnel to measure the electrical signals of the circuit nodes on the circuit board under test. At the same time, these probes or test rods can be designed with sharp probes. In order to measure the electrical signals, the maintenance personnel can force the insulation coating or even plastic on the circuit board under test to pierce. For example, the circuit maintenance system of claim 1, wherein the artificial intelligence logic is information recorded on the computer platform, and the recording form can be a known database system, text table, code array, etc. Test the power supply and signal source to be provided during the operation of the circuit board, the steps and procedures for testing the circuit board, and the corresponding relationship between the input and output of the circuit board under test under normal circumstances. The graphical interface program can access the artificial intelligence logic to A series of automatic test procedures are performed on the circuit board to be tested. The graphical interface program can be suspended at a specific test step of a series of test procedures according to the record of the artificial intelligence logic, or manually decide to perform the next test step, or Returning to the previous test step, the maintenance personnel can set the test program to a specific test step and pause it in order to observe or eliminate circuit abnormalities that will occur only under a specific combination of input conditions or a specific operating sequence. The artificial intelligence logic It also describes the test steps when the circuit board under test is abnormal. According to the process, the graphical interface program can guide the maintenance personnel to use the measuring equipment to perform a series of electrical measurement of the circuit nodes. The artificial intelligence logic records the judgment logic for the maintenance of the circuit board under test, and guides the maintenance personnel to measure. After taking the electrical signals of each circuit node, the graphical interface program can gradually narrow down the range of possible faulty components according to the electrical characteristics data table of the node and the records of the artificial intelligence logic, to help users correctly judge the faulty components or circuits of the circuit. A process can be a step-by-step operation of human-computer interaction, or it can be a judgment of the fault location after each circuit node is measured in batches. For example, the circuit maintenance system of item 1, wherein the graphic interface program provides a graphical operation interface for the maintenance personnel, and can manage the account and password of the maintenance personnel. The graphic interface program can define the maintenance personnel to operate according to the account and password. Measurement items. At the same time, the graphic interface program can also record the time when the maintenance personnel log in to the system and the measurement items. The graphic interface program has three modes: overall function test, single function test and component maintenance test. The graphic interface program will Display the physical photos of the test power source and signal source, the measurement equipment and the circuit board to be tested or their equivalent diagrams on the screen, and guide the maintenance personnel to the test power source and signal source, the measurement equipment and the test unit The circuit board performs physical electrical connection; when the graphic interface program works in the overall functional test mode, the graphic interface program will feed the necessary test power and signal source to the circuit board under test according to the records of the artificial intelligence logic, and according to the Circuit board test steps and processes recorded by artificial intelligence logic Physical function test. During the test, the graphic interface program will also access the electrical characteristics data table of the node to determine whether the circuit is normal. When the circuit function is abnormal, the graphic interface program can be suspended or skipped according to the records of the artificial intelligence logic. Specific test steps to avoid meaningless test data or to continue to expand the scope of the fault because of continued input of test signals in the event of a circuit failure; when the graphical interface program works in the overall functional test mode, its test program has manual pause, Functions such as manual stop, fixed-point pause, single-step forward, single-step backward, or conditional pause based on the measurement signal allow maintenance personnel to keep the input and output of the circuit board in a specific state at any time and change to that at any time as needed. Component maintenance test mode of the graphic interface program; When the graphic interface program works in the component maintenance test mode, the graphic interface program will display the circuit diagram or schematic diagram of the circuit board to be tested, and a physical photo, and display the comparison relationship with the icon. Convenient for maintenance personnel to find the circuit to be measured on the circuit board under test Point position, the graphical interface program also has a graphical interface that allows the maintenance staff to select the power and signal source of the circuit board to be tested. At this time, the maintenance staff can use the probe or test rod provided by the measuring device to measure For circuit nodes, the measured electrical signals will be displayed in the operation screen. On the other hand, the graphical interface program will access the node's electrical characteristics data table and display the correct electrical characteristics of each circuit node in the operation screen for maintenance personnel to compare. The graphic interface program can also display the meaning of the abnormal signals common to each circuit node and the troubleshooting guidelines by clicking on the icons, helping the maintenance personnel to quickly troubleshoot the circuit. For example, the circuit maintenance system of item 1, wherein the maintenance notes are information recorded on the computer platform, and the recording form can be a known database system, text tables, code arrays, etc. The maintenance personnel can graphically point Select the way to create and edit the maintenance notes of each circuit node, and accumulate maintenance experience. When the graphical interface program works in the component maintenance test mode, it can display the maintenance notes of each circuit node, helping the maintenance personnel to quickly find the faulty component from the past maintenance experience Or lines.