TW201415045A - Detecting system for detecting circuit board and leakage current detecting method - Google Patents

Abstract

A detecting system is used to perform a leakage current detecting method for detecting leakage current of a circuit board. The method includes placing the circuit board into a detection carrier; providing a DC power to the circuit board, so as to perform power-on test on the circuit board; cutting off the DC power to the circuit, so as to turn off the circuit board; through a leakage current pin, retrieving voltage of leakage current of the circuit board; and determining whether the circuit board passes the leakage current through the voltage of leakage current.

Description

Test system and leakage current test method for testing circuit boards

The invention relates to a measurement of leakage current of a circuit board, in particular to a test system for testing a circuit board and a leakage current test method.

In the prior art, the motherboard must undergo a power test, a plate bend test, a voltage test of the battery of the motherboard, and a voltage test of the leakage current. The power supply test system powers on the motherboard, and receives the signal output of the motherboard signal output or the specific detection contact to determine whether the circuit board can work normally. For the voltage test of the battery of the motherboard and the measurement of the leakage current of the motherboard, it is necessary to stop the power supply to the motherboard and measure the power of the motherboard. The above measurement mainly uses a measuring fixture to fix the motherboard, and the measuring fixture is electrically connected to a specific contact of the motherboard through a probe, an electrical connector, etc., and is then supplied to an external measuring device, such as a voltmeter. The voltage value of the specific contact is obtained for the tester to judge whether the leakage current condition of the motherboard reaches the allowable standard through the voltage values.

The power supply test, the plate bend test, the voltage test of the battery of the motherboard, and the leakage current test are usually performed at different stations, and multiple manpower is required to complete the test operation. For example, the power supply test must be tested in the case of a motherboard that supplies power, and the voltage test and leakage current test of the battery of the motherboard must be tested in the case of a power failure of the motherboard, so it is usually tested at different platforms. The plate bending test can be integrated into one of the test steps because it is independent of the power state of the motherboard. In addition, the judgment and record of each test result is mainly achieved through manpower. In the process of batch testing the motherboard, the correctness of the test depends on people. The correctness of the power interpretation. Therefore, the motherboard defect rate cannot be updated in real time, and statistics can only be performed after each batch. To analyze the success or failure of the power supply test, the leakage current, and the distribution of the battery voltage, it is necessary to further record the test results of each motherboard one by one, resulting in poor test efficiency. If you test some defects of the motherboard at the same time, such as the voltage of the BIOS battery and the degree of bending of the board, there is more data to be recorded and counted, which is more labor-intensive, so that accurate data analysis is often ignored, and only the statistical bad rate is simple. .

In addition, different motherboards have different leakage current tolerance standards. In the case of human intervention, it is easy for a person to interpret the leakage current voltage value with a wrong tolerance standard, and thus the problem of the test result is wrong.

In view of the above problems, the present invention provides a test system for testing a circuit board and a power supply test and a leakage current test method, thereby solving the problem that the test of the circuit board is inefficient and difficult to statistically record in the conventional technology.

The test system for testing a circuit board of the present invention is used for power supply testing of a circuit board to be tested, and further testing the leakage current of the circuit board to be tested. The circuit board to be tested includes at least a BIOS code storage unit, a BIOS set value temporary storage unit, a battery, a main function circuit and a standby power input terminal for obtaining a standby power.

The test system includes a test vehicle and a test circuit. The test carrier is used to accommodate the circuit board to be tested and establish an electrical connection with the circuit board to be tested. The test circuit includes a memory module, a controller, a control pin assembly and a detection pin assembly.

The memory module is used to store the code and temporarily store various test results and test settings. value. The controller is used to load and execute the code, and performs a test operation; after receiving the test result, the controller writes the test result to the memory module. The control pin assembly includes at least one power input node and a standby voltage input node, which are respectively connected to the controller. The power input node is configured to receive the power input to drive the test circuit, and the standby voltage input node is connected to the standby power input end, so that the controller determines whether the circuit board to be tested is in a shutdown state. The detecting pin assembly includes at least one leakage current voltage pin connected to the standby power input end; the controller determines whether the circuit under test passes the leakage current test in the shutdown state through the leakage current voltage pin, and generates a leakage current. Warning.

The test circuit can sequentially perform the power supply test and the leakage current test on the test board, and further expand the voltage measurement and the plate bend test of the battery through the additional pin and the function expansion of the test carrier, and the circuit The test operations required for the board are concentrated on a single station and the test data is quickly collected. Therefore, the test system of the present invention streamlines the platform required to complete each test, and streamlines the manpower.

The invention further provides a power supply test and a leakage current test method for testing a leakage current of a circuit board to be tested. The circuit board to be tested includes at least a BIOS code storage unit, a BIOS set value temporary storage unit, a battery, a main function circuit and a standby power input terminal, and the standby power input terminal is used to obtain a standby power.

The leakage current test method includes: placing the circuit board to be tested in a test vehicle; providing a constant current power to the circuit board to be tested, performing power supply test on the circuit board to be tested, and thereby performing functional timing of the circuit board to be tested after power on Whether it is normal, and judge whether the circuit board to be tested can work correctly; interrupt the DC power supplied by the circuit board to be tested, and shut down the circuit board to be tested; obtain the voltage value of the leakage current of the circuit board to be tested through a leakage current voltage pin. And according to the voltage value, determine that the circuit board to be tested is in the off state Whether leakage current will occur.

The effect of the invention is that, through the above test system and leakage current test method, the electrical test circuit board can be driven to automatically perform the switch test, and then the test system automatically tests the leakage current and writes the test result into the memory module. . By extracting the records in the memory module, for example, the controller further transmits it to the background, and records and analyzes the power supply test results and the leakage current test of the plurality of circuit boards to be tested in batches, without manual one by one. Judge. In addition, through the rewriting of the code and changing the configuration of the detection pin assembly, the test system quickly changes its test object, and can further test other defects of the circuit board to be tested, such as the battery terminal voltage of the BIOS, to be tested. Board bending of the board, etc. Through a single test system and test sequence arrangement, the present invention can sequentially complete power supply test, leakage current measurement, battery terminal voltage, board bending of the board to be tested, etc. in a single station, thereby reducing the need for test circuit boards. Manpower.

The features, implementations, and utilities of the present invention are described in detail below with reference to the drawings.

Please refer to FIG. 1 , which is a test system for testing a circuit board according to an embodiment of the present invention, for performing power supply test, plate bending test, battery voltage test of main board, and leakage current voltage. test. The test system includes a test circuit 100, a test carrier 300, and a workstation station 400. The test system is used to test the leakage current of a circuit board 200 to be tested.

As shown in "Fig. 2", the circuit board 200 to be tested includes at least a basic input/output system 210 (BIOS 210). BIOS 210 includes a BIOS code storage unit 211. The BIOS set value temporary storage unit 212, a battery 213, a main function circuit 220, and a standby power input terminal STB. The BIOS code storage unit 211 is configured to store the BIOS code, the BIOS setting value temporary storage unit 212 for temporarily storing the setting values of the circuit board 200 to be tested, and the battery 213 for supplying power to the BIOS setting value temporary storage unit 212. To maintain the setting of the BIOS setting value temporary storage unit 212. The standby power input terminal STB is configured to obtain a standby power from a power supply module 230 to maintain the standby circuit board 200 in a standby mode (Standby Mode), and can be awake at any time to return to the state before entering the standby state.

As shown in FIG. 1 , the test carrier 300 houses the circuit board 200 to be tested and establishes an electrical connection with the circuit board 200 to be tested to supply power to the circuit board 200 to be tested. The power supply module 230 is disposed in the test carrier 300, and the test carrier 300 can supply an AC power AC to the power supply module 230, so that the power supply module 230 generates a DC power to be transmitted to the power supply module 230. The circuit board 200 to be tested.

As shown in FIG. 3, the test circuit 100 for testing a circuit board includes a memory module 110, a controller 120, a control pin assembly 130, a detection pin assembly 140, and a first The data transmission interface 150, a second data transmission interface 160, a power input port 171, a power switch button 172, a power indicator light 173, a reset button 181, a start button 182, and a mode switch 190. The aforementioned test circuit 100 can be integrated on a single printed circuit board or distributed on a plurality of printed circuit boards.

As shown in FIG. 3, the memory module 110 is used to store code, such as a firmware program. The memory module 110 temporarily stores the test result and the test set value. The specific implementation of the memory module 110 can be a non-volatile memory module (such as a flash memory), The above code is stored, and the test set value and test result can be continuously stored after the power is turned off. Another embodiment of the memory module 110 is a combination of readable and writable programmable memory (EPROM) and random access memory (RAM); wherein the EPROM is used to store the code, and the RAM is used in the test circuit. When 100 is energized, the test set value and test result are temporarily stored.

As shown in FIG. 3, the controller 120 is electrically connected to the memory module 110. The controller 120 is configured to load and execute the code from the memory module 110 to perform a test operation. After receiving the test result, the controller 120 writes the test result into the memory module 110 for temporary storage. In addition, controller 120 outputs test results in a specified communication protocol.

The power input port 171 is connected to the controller 120 for inputting a power such that the test circuit 100 operates with its own power without additional power. In one embodiment, the power input port 171 can be a USB port, but the USB port only has a 5V pin and a ground pin enable, so that the power input port 171 can obtain power through a transformer, and can also pass through the workstation 400. Or test vehicle 300 to obtain power. The power switch button 172 is coupled to the controller 120 for generating a trigger signal for enabling or disabling the test circuit 100. In addition, the power indicator 173 is electrically connected to the controller 120. When the test circuit 100 is in operation, the controller 120 enables the power indicator 173 to indicate that the power of the test circuit 100 is on. When the power of the test circuit 100 is turned off, the controller 120 stops the enable power indicator 173.

As shown in FIG. 3, the reset button 181 is electrically connected to the controller 120 for generating a reset signal for causing the controller 120 to reset.

As shown in "Figure 3" and "Figure 4", the control pin assembly 130 is at least included. A power input node 131 and a standby voltage input node 132 are respectively connected to the controller 120. The power input node 131 is configured to receive a power input, such as 5V Vcc power, to drive the test circuit 100 to operate. The standby voltage input node 132 is directly or indirectly connected to the standby power input terminal STB of the circuit board 200 to be tested, and the controller 120 is connected to the standby voltage input node 132; by the presence or absence of the standby voltage (for example, 5V Standby voltage), the controller 120 determines whether the power supply module 230 continuously transmits power to the circuit board 200 to be tested, thereby determining whether the circuit board 200 to be tested has been shut down.

As shown in FIG. 1 , FIG. 3 and FIG. 4 , the test vehicle 300 further includes a cover detector 310 for detecting whether the cover of the test carrier 300 is turned on and A cover signal is generated when the cover is opened. The control pin assembly 130 further includes a cover signal input terminal 133 electrically connected to the controller 120. The cover signal input terminal is configured to receive the cover open signal from the cover open detector 310 and transmit the cover open signal to the controller 120, so that the controller 120 determines whether the cover of the test carrier 300 is open or closed, and the controller The test operation is performed only when the cover is closed, that is, the test operation is interrupted when the controller 120 receives the cover open signal.

As shown in FIG. 1 , FIG. 3 and FIG. 4 , the test vehicle 300 further includes a plate bend detector 320 , such as a laser sensor for detecting the circuit board to be tested. The curvature of 200. The control pin assembly 130 further includes a plate bend signal input end 134 coupled to the controller 120 for receiving the curvature from the plate bend detector 320 and transmitting to the controller 120. In addition, a threshold value of the curvature is further set in the controller 120, and the controller 120 compares the curvature and the threshold value to determine whether the circuit board to be tested is bent.

As shown in FIG. 3 and FIG. 4, the control pin assembly 130 further includes an activation signal input terminal 135 for receiving an activation signal; the activation signal is externally input, for example, externally connected to the activation signal. The button of the input terminal 135, the workstation station 400, the test vehicle 300, and the like, and the controller 120 is connected to the activation signal input terminal 135 for receiving the activation signal to start the test operation. In addition, the activation signal can also be generated by the start button 182 and transmitted directly to the controller 120.

In addition, as shown in "Fig. 3" and "Fig. 4", the control pin assembly 130 further includes a set of status signal output terminals 136a, 136b and a set of alert audio output terminals 137a, 137b.

The status signal output terminals 136a, 136b are connected to the controller 120 and connected to a group of lights; the controller 120 outputs status signals through the status signal output terminals 136a, 136b to control the light and dark changes of the lights to display different test results. The light can also be a built-in light and directly electrically connected to the controller 120.

The warning sound output terminals 137a, 137b are connected to the controller 120 and connected to a speaker; the controller 120 outputs an alarm signal through the status signal output terminals 136a, 136b to control the speaker to sound a warning tone. The light can also be a built-in speaker directly connected to the controller 120.

As shown in FIG. 1 and FIG. 5, the detection pin assembly 140 is coupled to the controller 120. The detection pin assembly 140 includes at least a leakage current voltage pin 141 and a battery voltage measuring pin. Bit 142. The leakage current voltage pin 141 is connected to the standby power input terminal STB of the circuit board 200 to be tested; by the leakage current voltage pin 141, the controller 120 determines whether the circuit board 200 to be tested generates a leakage current in a shutdown state, and The magnitude of the leakage current is estimated based on the voltage value, thereby generating a leakage current warning. battery The voltage measuring pin 142 is connected to the battery 213 of the BIOS 210 for obtaining the terminal voltage of the battery 213 for the controller 120 to determine whether the voltage of the battery 213 falls within the normal range. The detection pin assembly 140 can also include other voltage detection pins for detecting other voltages to obtain more information about the board 200.

As shown in "1" and "3", the first data transmission interface 150 is connected to the controller 120 to connect the controller 120 to the workstation station 400. Based on the communication protocol of the first data transmission interface 150, such as the COM port protocol, the controller 120 encodes the test result and outputs it to the workstation station 400 through the first data transmission interface 150. The workstation station 400 is provided with an interface software for generating a message display interface in a display screen for displaying test results.

The second data transmission interface 160 is coupled to the controller 120 for connecting the controller 120 to the test carrier 300. The second data transmission interface 160 is used for transmitting data from the test carrier 300 to the controller 120 for transmitting data from the test carrier 300 to the workstation station 400 through the controller 120; or, the controller 120 transmits data to the test vehicle. 300, the data is transmitted from the workstation station 400 to the test vehicle 300 through the controller 120.

As shown in "Fig. 6" and "Fig. 7", based on the aforementioned test circuit 100, the present invention proposes a power supply test and a leakage current test method, the steps of which are explained below.

First, the tester opens the cover of the test carrier 300 and places the circuit board 200 to be tested in the test carrier 300, as shown in step 110. at this time. Because the cover is opened, the cover open detector 310 generates a cover open signal, which is transmitted to the controller 120, so that the controller 120 generates a cover open state signal, which is transmitted from the status signal output terminals 136a, 136b to the light number, so that the light display cover The on state, for example, flashes alternately with red and green lights. At the same time, the controller 120 also generates a cover opening prompt signal, which is transmitted to the speaker by the warning sound effect output terminals 137a, 137b to drive the speaker to generate a cover opening prompt sound, for example, a short beep Be three sounds.

Next, the tester covers the lid of the test carrier 300, as shown in step 120. At this time, because the cover is closed, the cover open signal of the cover open detector 310 is interrupted, so that the controller 120 generates a cover closed state signal, which is transmitted from the status signal output terminals 136a, 136b to the light number, so that the light display cover is closed. The status, for example, continues to illuminate with a green light.

Then, the test vehicle 300 supplies an AC power AC to the power supply module 230 to provide DC power to the circuit board 200 to be tested through the power supply module 230, thereby performing power supply test on the circuit board 200 to determine the circuit board to be tested. Whether the 200 can operate normally, as shown in step 130. At this time, the circuit board 200 continues to generate operational data, and is transmitted to the controller 120 through the second data transmission interface 160. The controller 120 transmits the operation data to the workstation station 400 through the first data transmission interface 150 for the workstation station 400 to determine. Whether the circuit board 200 to be tested can operate normally. At this time, the controller 120 continues to generate the cover closed state signal, and the drive light indicates that the cover is closed, for example, the green light continues to illuminate.

Next, the circuit board 200 to be tested is shut down, so that the power supply module 230 interrupts the DC power DC supplied by the circuit board 200 to be tested, as shown in step 140. At this time, the controller 120 generates a DC power interruption state signal, and the driving lamp number displays the DC power interruption state, for example, flashing alternately with red and green lights. At the same time, the controller 120 generates a DC power interruption warning signal to drive the speaker to generate a DC power interruption prompt tone. For example, Be sounds for three consecutive seconds.

The controller 120 continues to determine whether the second data transmission interface 160 still has operating resources. The material input is used to determine whether the power supply module 230 continues to supply the DC power DC to the circuit board 200 to be tested, so that the circuit board 200 to be tested is maintained in a power-on state, thereby determining whether the circuit board 200 to be tested can be normally shut down, such as steps. Step 150; if yes, return to step 130 and continue testing the circuit board 200 to be tested.

If it is determined in step 140 that the DC power DC has been interrupted, and the circuit board 200 to be tested is turned off, the controller 120 further determines whether the cover of the test carrier 300 is opened by the cover open detector 310, as in step 160. Show.

If the controller 120 determines in step 160 that the cover of the test vehicle 300 is turned on, the controller 120 issues a cover open warning signal to drive the light to display the cover open state, for example, the red and green lights continue to flash alternately, and the controller 120 and drive the speaker to issue a cover warning sound, such as a short beep, to prompt the tester to close the cover.

If the controller 120 determines in step 160 that the cover of the test vehicle 300 is closed, the controller 120 waits for the start signal to determine whether the start signal is received. The source of the activation signal is such that the user presses the start button 182 or the activation signal input terminal 135 receives the activation signal from the outside.

After receiving the start signal, the controller 120 obtains the voltage value through the leakage current voltage pin 141. The controller 120 evaluates the magnitude of the leakage current according to the voltage value, and determines whether the leakage current is generated by the circuit board 200 to be tested in the off state to determine whether the leakage current test is successful, as shown in step 170.

If the leakage current test fails, the controller 120 transmits the leakage current data to the workstation station 400 through the first data transmission interface 150 for the workstation station 400 to transmit to the SFIS (Shop Floor Information System), as in Step Step 180, and returns to step 140 to turn off the DC power DC. At the same time, the controller 120 sends a leakage current warning signal to drive the light to display a leakage current warning. For example, the red light is continuously illuminated, and the controller 120 drives the speaker to emit a leakage current warning sound, for example, the Be sound is continuously sent once to warn the tester. .

If the leakage current test is successful, the controller 120 also transmits the leakage current data to the workstation station 400 through the first data transmission interface 150 for the workstation station 400 to transmit to the SFIS, as shown in step 190. At the same time, the controller 120 sends a leakage current test success signal to drive the light to indicate that the leakage current test is successful, for example, the green light number is continuously bright, and the controller 120 drives the speaker to emit a leakage current test successful sound effect, for example, short Be sound twice to notify Testers. Through the judgment process of the Step 150, it can be ensured that the DC circuit DC of the circuit board 200 to be tested can be surely interrupted after the power supply test of the circuit board 200 to be tested to perform the leakage current test and the measurement battery 213. The voltage at the end. Therefore, the power supply test, the leakage current test, and the voltage at the terminal of the measurement battery 213 can be integrated into a single station without being divided into different station tests.

The tester opens the cover and performs a plate bending test with the plate bend detector 320 to obtain the curvature and transmits it to the controller 120, so that the controller 120 determines whether the plate bending test is successful, as shown in step 210.

A threshold value is set in the controller 120. If the degree of curvature is less than the threshold value, the controller 120 determines that the plate bending test is successful, and the controller 120 transmits the plate bending test data to the workstation station 400 through the first data transmission interface 150 for the workstation station 400 to transmit to the SFIS, and ends the test. operation. At the same time, the controller 120 sends a plate bending test success signal to drive the lamp number display plate bending test successfully, for example, the red and green lights continue. After alternately flashing for five seconds, the green light is long; the controller 120 drives the speaker to send a plate bend test successful sound effect, such as short beep twice to inform the tester.

If the degree of curvature is greater than the threshold value, the controller 120 determines that the test has failed; the controller 120 also transmits the plate bending test data to the workstation station 400 through the first data transmission interface 150 for the workstation station 400 to transmit to the SFIS, as in step 230. Show. At the same time, the controller 120 sends a plate bending test failure signal to drive the lamp display panel to bend the test failure. For example, the red and green lights continue to flash alternately for five seconds, and then the red light is long; the controller 120 drives the speaker to issue a plate bending test. Failed sound effects, such as a long Be sound, to inform the tester.

The controller 120 then determines whether the number of plate bending tests exceeds a predetermined number of times, for example, three times, as shown in step 240. If the predetermined number of times is exceeded, the controller 120 also ends the test operation. If the predetermined number of times is not exceeded, the controller 120 waits for the retest signal, as shown in step 250, and performs the plate bending test again after receiving the retest signal. While waiting for the retest signal, the controller 120 drives the light to prompt the tester to press the retest button to issue a retest signal, for example, the red and green lights continue to alternate, and the speaker is driven to emit a long Be sound for three seconds to notify the tester. .

Referring to "Fig. 8" and "Fig. 9", the overall detection timing of the leakage current test method of the present invention is explained below.

In the first stage P1, the cover of the test carrier 300 is closed, and the AC power AC is input to the power supply module 230. At the same time, the circuit board 200 to be tested is powered on, so that the power supply module 230 generates DC power DC output to the circuit board 200 to be tested. At this time, if the circuit board 200 to be tested can be normally turned on and operated, the circuit board 200 to be tested can generate data, and the controller 120 drives the light signal (such as a green light) to display the circuit to be tested. The state in which the board 200 is operating normally. This phase is equivalent to step 130.

In the second stage P2, the circuit board 200 to be tested is turned off. At this time, if the power is normally turned off, the AC power AC is still input to the power supply module 230, but the DC power DC output of the power supply module 230 is turned off. If the DC power DC output is interrupted and the normal shutdown of the circuit board 200 to be tested exceeds 10 seconds, the controller 120 drives the light signal to indicate that the circuit board 200 to be tested can be normally shut down (for example, a green light). If the DC power DC output continues without interruption for more than 10 seconds, if the shutdown procedure of the circuit board 200 to be tested is incorrect, the controller 120 drives a lamp number (for example, a red light) to display a state in which the circuit board 200 to be tested is turned off. This phase is equivalent to step 140.

In the third stage P3, it is confirmed whether the AC power AC is completely interrupted, and it is repeatedly confirmed whether the DC power DC is interrupted. If the AC power and the DC power DC are both interrupted, the controller 120 drives the red light and the green light to flash alternately, indicating that the circuit board 20 to be tested is powered off. In addition, the controller 120 further drives the speaker sound effect, for example, the Be sound for three seconds, prompting the circuit board 200 to be tested to be powered off. This phase is equivalent to step 150-Step 160.

In the fourth stage P4, the start button 182 is pressed to issue a start signal, so that the controller 120 starts measuring the voltage of the leakage current through the leakage current voltage pin 141, and measures the end of the battery 213 with the battery voltage measuring pin 142. Voltage. If the voltage of the leakage current falls within the allowable range, the leakage current state of the circuit board 200 to be tested is normal, and the controller 120 drives the signal to indicate that the leakage current test is successful, for example, the driving green light is on; if, the leakage current voltage falls within the allowable range. Outside the range, the controller 120 drives the light to indicate that the leakage current test has failed, for example, the red light is on. This phase is equivalent to step 170. The first stage P1 to the third stage P3 can ensure supply of the circuit to be tested after the power supply test is completed. The DC power DC of the board 200 is interrupted, and the fourth stage P4 can be continuously performed to measure the leakage current and the voltage of the terminal of the battery 213, and determine whether the power management (power on and power off function) of the circuit board to be tested is normal. Therefore, the power supply test, the leakage current, and the measurement of the voltage of the terminal of the battery 213 can be integrated in a single station, and it is not required to be separately tested by different stations because of different power supply requirements, thereby reducing the configuration of the human.

In the fifth stage P5, the cover of the test carrier 300 is opened for the plate bend detector 320 to detect the plate bending state. Similarly, if the degree of curvature falls within the allowable range, the controller 120 drives the signal display panel to bend the test successfully; if the degree of curvature falls outside the allowable range, the controller 120 drives the indicator display panel to fail the test. This phase is equivalent to step 210.

In the sixth stage P6, the controller 120 transmits the test result, including the bending degree and the leakage current voltage, to the workstation station 400, and then transmits it to the SFIS database for storage by the workstation station 400. This phase corresponds to steps 220 and 230.

As described above, the workstation 400 is provided with an interface software for displaying various information. The information shown may include the firmware version, the update date, the data transmission interface used, and the baud rate. In addition, the model name of the board can also be displayed. The model name can be manually input or obtained through the memory module 110. After the workstation 400 executes the interface software, the test item can be written into the memory module 110 of the test circuit 100 or read from the memory module 110 through the first data transmission interface 150.

The interface software can also be switched to an editing interface to edit the test settings of the model.

Referring to FIG. 3, in order to prevent the test set value of the model from being accidentally changed, the test circuit 100 further includes a mode switch button for cutting the test circuit 100. Change to measurement mode and edit mode. In the measurement mode, the test circuit 100 performs a test operation. In the edit mode, the controller 120 receives the edit command issued by the workstation station 400 through the first data transmission interface 150, and edits the test set value of the model.

As shown in FIG. 10, the process of editing the test set value of the model first turns on the DC power DC of the test circuit 100 with the power switch button 172, as shown in step 310. The test circuit 100 is then switched to the edit mode by the mode switch 190 as shown in step 320. The workstation station 400 starts and executes the interface software, and connects the workstation station 400 and the test circuit 100 with the first data transmission interface 150, as shown in step 330 and step 340. The workstation station 400 switches the software interface to the editing interface for the tester to edit the test set values of the model, as shown in step 350 and step 360. After the editing is completed, the workstation station 400 issues an editing command, and writes the editing result to the memory module 110 of the test circuit 100, as shown in step 370. Finally, the model is selected through the editing interface, and the enabled voltage detection pin is set to complete the setting, as shown in step 380 and step 390.

100‧‧‧Test circuit

110‧‧‧Memory Module

120‧‧‧ Controller

130‧‧‧Control foot assembly

131‧‧‧Power input node

132‧‧‧Standby voltage input node

133‧‧‧Open signal input

134‧‧‧ plate bending signal input

135‧‧‧Start signal input

136a, 136b‧‧‧ Status signal output

137a, 137b‧‧‧ warning sound output

140‧‧‧Detecting the foot assembly

141‧‧‧Leakage current voltage pin

142‧‧‧Battery voltage measurement pin

150‧‧‧First data transmission interface

160‧‧‧Second data transmission interface

171‧‧‧Power input port

172‧‧‧Power switch button

173‧‧‧Power indicator

181‧‧‧Reset button

182‧‧‧Start button

190‧‧‧ mode switch

200‧‧‧Device board to be tested

210‧‧‧Basic input and output system

211‧‧‧BIOS code storage unit

212‧‧‧BIOS set value temporary storage unit

213‧‧‧Battery

220‧‧‧ main function circuit

230‧‧‧Power supply module

310‧‧‧ Cover open detector

320‧‧‧ plate bend detector

300‧‧‧Test Vehicle

400‧‧‧Workstation

STB‧‧‧Standby power input

AC‧‧‧AC power

FIG. 1 is a system block diagram of a test system for testing a circuit board according to an embodiment of the present invention.

FIG. 2 is a circuit block diagram of a circuit board to be tested in the embodiment of the present invention.

FIG. 3 is a circuit block diagram of a test circuit in an embodiment of the present invention.

Figure 4 is a schematic diagram of the control pin assembly in the embodiment of the present invention.

FIG. 5 is a schematic diagram of detecting a foot assembly according to an embodiment of the present invention.

Figures 6 and 7 are flow charts of the leakage current testing method of the present invention.

Figures 8 and 9 are timing diagrams of the leakage current test method of the present invention.

Figure 10 is a flow chart showing the test set values of the editing model in the embodiment of the present invention.

Claims (19)

A test system for testing a circuit board for performing a power on/off test on a circuit board to be tested and testing a leakage current of the circuit board to be tested, the circuit board to be tested comprising at least a BIOS code storage unit and a BIOS a set value temporary storage unit, a battery, a main function circuit, a standby power input terminal and a power supply module, wherein the standby power input terminal is configured to obtain a standby power, and the power supply module is configured to receive an AC power and The test system includes: a test carrier for accommodating the circuit board to be tested, and establishing an electrical connection with the circuit board to be tested, and the test vehicle supplies the AC power to the power supply The module, the power supply module outputs the DC power to perform power supply test on the circuit board to be tested, and generates operation data; and a test circuit includes: a memory module for storing the code, and temporarily Storing test results and test set values; a controller for loading and executing the code to perform a test operation; and after receiving the test result, the controller The result is written into the memory module; and the controller receives the operation data to determine whether the circuit board to be tested can operate normally, and shuts down the circuit board to be tested after the power supply test; a control pin assembly, At least one power input node and a standby voltage input node are respectively connected to the controller; wherein the power input node is configured to receive a power input to drive the test circuit, and the standby voltage input node is connected to the standby power input end Let the controller discriminate Measuring whether the circuit board is in a shutdown state; a detecting pin position assembly, comprising at least one leakage current voltage pin connected to the standby power input end; the controller determines the circuit board to be tested to be turned off through the leakage current voltage pin Whether the leakage current test is passed in the state, and a leakage current warning is generated. The test system for testing a circuit board according to claim 1, further comprising a workstation station, and the test circuit further comprises a first data transmission interface connected to the controller to connect the controller to the workstation station The controller encodes the test result and outputs the test result to the workstation station through the first data transmission interface, and the workstation station installs an interface software for generating a message display interface in a display screen to display the test result. . The test system for testing a circuit board according to claim 2, wherein the test circuit further includes a mode switching button for switching the test circuit to the measurement mode and the edit mode; wherein in the measurement mode, The test circuit performs a test operation, and in the edit mode, the controller receives an edit command issued by the workstation station, and edits the test set value of the model. The test system for testing a circuit board according to claim 1, wherein the test circuit further comprises a second data transmission interface for connecting the controller to the test vehicle, thereby transmitting data to the workstation station and the test Between the jigs, it is judged whether the circuit board to be tested can operate normally. The test system for testing a circuit board according to claim 1, wherein the test circuit further comprises a power input port and a power switch button connected to the controller; the power input port is configured to input a power, so that the Test circuit with its own Power operation; the power switch button is used to generate a trigger signal to activate or deactivate the test circuit. The test system for testing a circuit board according to claim 5, wherein the test circuit further comprises a power indicator light connected to the controller, and the controller enables the power indicator light when the test circuit operates. The test system for testing a circuit board according to claim 1, wherein the test carrier further includes a cover open detector for detecting whether the cover of the test carrier is turned on, and the controller is only Perform a test job when the lid is closed. The test system for testing a circuit board according to claim 1, wherein the test carrier further comprises a plate bend detector for detecting the curvature of the circuit board to be tested. The test system for testing a circuit board according to claim 8, wherein a threshold value is set in the controller, and the controller compares the curvature and the bending threshold to determine whether the circuit board to be tested is bending. The test system for testing a circuit board according to claim 1, wherein the control pin assembly further comprises a set of status signal outputs connected to the controller, and the controller outputs the status signal output terminals. Status signal to show different test results. The test system for testing a circuit board according to claim 1, wherein the control pin assembly further comprises a set of warning sound output terminals connected to the controller, and the controller outputs the status signal output terminals. A warning signal to sound a warning tone. The test system for testing a circuit board according to claim 1, wherein the detection pin assembly further comprises a battery voltage measuring pin for obtaining the terminal power of the battery. Pressing, for the controller to determine whether the voltage of the battery falls within the normal range. A leakage current test method for testing a leakage current of a circuit board to be tested, wherein the circuit board to be tested includes at least a BIOS code storage unit, a BIOS set value temporary storage unit, a battery, a main function circuit, and a a standby power input terminal and a power supply module, wherein the standby power input terminal is configured to obtain a standby power, and the power supply module is configured to receive an alternating current power and generate a direct current power; the leakage current test method includes: placing the standby power The test circuit board is in a test vehicle; the circuit board to be tested is turned on, so that the power supply module supplies DC power to the circuit board to be tested, to perform power supply test on the circuit board to be tested, and receive the standby The operation of the circuit board generates operation data to determine whether the circuit board to be tested can operate normally; the circuit board to be tested is shut down, so that the power supply module interrupts the DC power supplied to the circuit board to be tested, so that the standby The circuit board is turned off; the voltage value of the leakage current of the circuit board to be tested is obtained through a leakage current voltage pin; and the circuit board to be tested is judged according to the voltage value Whether a leakage current under a state machine. The leakage current testing method of claim 13, further comprising a step of detecting whether the cover of the test vehicle is open and issuing an alert when the cover is opened. The leakage current testing method of claim 14, further comprising a step of performing a plate bending test with a plate bend detector to obtain a bending degree of the circuit board to be tested. The leakage current testing method of claim 15, which further comprises: Setting a bending threshold value; and determining that the bending test is successful when the bending degree is less than the threshold value, and determining that the bending test fails when the bending degree is greater than the threshold value The leakage current testing method of claim 14, wherein the step of performing power supply testing on the circuit board to be tested comprises determining, by the operational data generated by the circuit board to be tested, whether the circuit board to be tested can operate normally. The leakage current test method of claim 15, wherein after each test step, the test result is further displayed by a light number. The leakage current test method of claim 15, wherein after each test step, the test result is further indicated by a sound effect.