CN108594105A - The detection method of mainboard indication lamp control circuit - Google Patents

Abstract

The embodiment of the present invention discloses a method for detecting the indicator light control circuit of the motherboard, comprising: obtaining the motherboard to be tested, wherein the motherboard to be tested includes a motherboard pin, a motherboard COM interface, a first power input terminal, a first resistor, and a first switch, The first resistor is connected between the first power supply input terminal and the first pin of the motherboard pin, the first switch is connected between the second pin of the motherboard pin and the ground potential, the first pin and the second pin are short-circuited, and The second pin is connected to the first indicator light and the first pin of the mainboard COM interface; the first switch is controlled to be turned off, and the signal state of the first pin is detected to judge whether the first resistor is loaded according to the signal state of the first pin; And control to turn on the first switch, and detect the signal state of the first pin to judge whether the first switch is on or not according to the signal state of the first pin.

Description

The detection method of the main board indicator light control circuit

technical field

The invention relates to the technical field of testing, in particular to a detection method for a mainboard indicator light control circuit.

Background technique

Computer motherboards need to go through a series of quality inspections before leaving the factory, including testing the indicator light control circuit of the motherboard to determine whether there is any abnormality in the process, such as missing parts of electronic components due to weak soldering or missing soldering. However, the existing detection method is to judge whether there is a missing part in the control circuit by observing the on/off of the indicator light of the main board with the naked eyes of the inspector, and the testing process is cumbersome and the efficiency is low.

Contents of the invention

Embodiments of the present invention provide a detection method for a mainboard indicator light control circuit, so as to realize the technical effects of simplifying the testing procedure and improving the testing efficiency.

The embodiment of the present invention provides a detection method for the indicator light control circuit of the motherboard, including:

Obtain the motherboard to be tested, wherein the motherboard to be tested includes a motherboard pin, a motherboard COM interface, a first power input terminal, a first resistor, and a first switch, and the first resistor is connected between the first power input terminal and the first switch. Between the first pins of the motherboard pins, the first switch is connected between the second pins of the motherboard pins and the ground potential, the first pins and the second pins are short-circuited, and the The second pin is connected to the first indicator light and the first pin of the COM interface of the motherboard;

controlling to turn off the first switch, and detecting the signal state of the first pin to determine whether the first resistor is connected according to the signal state of the first pin;

The first switch is controlled to be turned on, and the signal state of the first pin is detected to determine whether the first switch is on or not according to the signal state of the first pin.

In one embodiment of the present invention, the mainboard to be tested further includes an embedded controller chip, and the control terminal of the first switch is connected to the embedded controller chip to accept the control of the embedded controller chip to perform off or on.

In one embodiment of the present invention, the first indicator light connected to the second pin is a power indicator light.

In one embodiment of the present invention, the first pin is a DSR pin of the COM interface of the motherboard.

In one embodiment of the present invention, the motherboard to be tested further includes a southbridge chipset, and the control end of the first switch is connected to the southbridge chipset to accept the control of the southbridge chipset to turn off or turn on Pass.

In one embodiment of the present invention, the first indicator light connected to the second pin is a hard disk indicator light.

In an embodiment of the present invention, the first pin is a CTS pin of the COM interface of the motherboard.

In one embodiment of the present invention, the motherboard to be tested further includes a second power input terminal, a second resistor and a second switch, and the second resistor is connected between the second power input terminal and the motherboard pin between the third pins of the main board, the second switch is connected between the fourth pin of the motherboard pin and the ground potential, the third pin and the fourth pin are short-circuited, and the fourth pin is connected to The second indicator light and the second pin of the COM interface of the main board; the detection method also includes:

controlling to turn off the second switch, and detecting the signal state of the second pin to determine whether the second resistor is connected according to the signal state of the second pin;

controlling the conduction of the second switch, and detecting the signal state of the second pin to determine whether the second switch is on according to the signal state of the second pin;

Wherein, detecting the signal state of the first pin is performed synchronously with detecting the signal state of the second pin.

In one embodiment of the present invention, the mainboard to be tested further includes an embedded controller chip and a southbridge chipset, and the control terminal of the first switch is connected to the embedded controller chip to accept the embedded control chip. The control chip of the second switch is turned off or turned on, and the control terminal of the second switch is connected to the south bridge chipset to be turned off or turned on under the control of the south bridge chipset.

In one embodiment of the present invention, the first indicator light is a power indicator light, the second indicator light is a hard disk indicator light, and the first pin is the DSR pin and the CTS pin of the COM interface of the motherboard. One of the pins, the second pin is the other one of the DSR pin and the CTS pin of the COM interface of the motherboard.

The above technical scheme has the following advantages or beneficial effects: connect the main board pins of the main board to be tested with the main board COM interface and short-circuit the corresponding pins on the main board pins, and detect the signal state of the designated pin by controlling the on-off of the switch. Whether the detection resistor and the switch are mounted or not can realize the automatic detection of the computer motherboard when it leaves the factory, which greatly simplifies the testing process and improves the testing efficiency at the same time.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

Fig. 1 is the detection method flowchart of main board indicator light control circuit in one embodiment of the present invention;

Fig. 2 is the flow chart of the detection method of the main board indicator light control circuit in another embodiment of the present invention;

FIG. 3 is a diagram showing the connection relationship of components of the motherboard to be tested in an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

As shown in Fig. 1 and Fig. 3, a method for detecting a control circuit of a main board indicator light provided in an embodiment of the present invention includes the following steps:

S10. Obtain the mainboard to be tested, wherein the mainboard to be tested includes a mainboard pin 100, a mainboard COM interface 200, a power input terminal 300, a resistor R1 and a switch Q1, and the resistor R1 is connected between the power input terminal 300 and pin 2 of the mainboard pin 100 Between, the switch Q1 is connected between pin 4 of pin 100 of the motherboard and the ground potential, pin 2 and pin 4 are short-circuited, and pin 4 is connected to the power indicator light (Power LED) and pin 9 of the motherboard COM interface 200;

S20, control and close the switch Q1, and detect the signal state of the pin 9 to judge whether the resistor R1 is loaded according to the signal state of the pin 9;

S30 . Control the switch Q1 to be turned on, and detect the signal state of the pin 9 to determine whether the switch Q1 is on or not according to the signal state of the pin 9 .

Specifically, among the components of the mainboard to be tested as shown in FIG. Set expansion interface and other functions. The pin 2 and pin 4 of the motherboard pin 100 are short-circuited using, for example, a common motherboard jumper, and the pin 4 of the motherboard pin 100 is connected to the pin 9 of the motherboard COM interface 200 through, for example, a wire. In addition, when the mainboard under test is inspected at the factory, a voltage of 5v is usually applied to the input terminal of the power supply to detect the signal state of the pin 9 such as high/low voltage. It is worth mentioning that the motherboard COM interface 200 in this embodiment can be a rear COM port on the motherboard, that is, an interface that can be seen at the rear of the host computer, or it can be a COM pin built into the motherboard. .

After step S10 is executed to complete the above connections, the switch Q1 of the mainboard to be tested receives a control signal to be turned off or turned on. In this embodiment, the control terminal of the switch Q1 is connected to an embedded controller (EC, Embed Controller) chip on the mainboard to be tested, and the embedded controller chip realizes the closing or conducting of the switch Q1. An embedded controller chip is a control system used to perform specified independent control functions and has the ability to process data in a complex way. It is composed of a series of microelectronic devices including microprocessor chips, timers, sequencers or controllers. Electronic equipment or devices controlled by embedded microelectronic technology chips can complete various automatic processing tasks such as monitoring and control. Correspondingly, since the pin 4 is connected to the power indicator light, the detection method in this embodiment is used to detect the control circuit of the power indicator light of the motherboard.

On this basis, step S20 is executed, the embedded controller chip controls the switch Q1 to close, and the input terminal of the power supply 300 is loaded with a voltage of 5v to detect the signal state of the pin 9. At this time, if the signal of the pin 9 is, for example, a voltage signal of If the potential is high, it indicates that the two ends of the resistor R1 are in a connected state, and the upper part of the resistor R1 is judged; on the contrary, if the signal of pin 9, such as a voltage signal, is at a low potential, it indicates that the two ends of the resistor R1 are in a non-conductive state , it is judged that the resistor R1 is not loaded, or it is called a missing piece.

Execute step S30, the embedded controller chip controls the switch Q1 to be turned on, the input terminal of the power supply 300 is loaded with a voltage of 5v, one end of the switch Q1 is connected to the ground potential, and then the signal state of the pin 9 is detected, at this time, if the pin 9 If the signal such as the voltage signal of pin 9 is a low potential, it indicates that the two ends of the switch Q1 are in a connected state, and the upper part of the switch Q1 is judged; terminal is in a non-conductive state, it is judged that the switch Q1 is not on.

It should be noted that the detection of the signal state of pin 9 is generally performed by an external detection device, such as a PC, a tablet computer, or an intelligent mobile terminal, etc., and a corresponding detection program can be configured on the above-mentioned detection device. Executing the detection work can further improve the execution efficiency of the line detection.

It is worth mentioning that this embodiment does not limit the execution order of step S20 and step S30, but in order to improve the detection efficiency, you can choose to first execute step S20 to detect the loading state of resistor R1, and after the detection is qualified, prove After the connection from the input terminal of the power supply 300 to the pin 4 is in a connected state, step S30 is performed to detect the loading state of the switch Q1, which can save detection time and reduce detection procedures.

In addition, the pin 9 in this embodiment is a DSR (data set ready) pin of the motherboard COM interface 200, and the motherboard COM interface 200 is, for example, a common 9-pin RS-232 serial port.

The detection method provided by this embodiment not only detects the control circuit of the power indicator light of the motherboard, but also detects the control circuit of the hard disk indicator light (HDD LED) of the motherboard. At this time, the control end of the switch Q1 is connected to the South Bridge chipset (South Bridge) of the mainboard to be tested so as to be turned off or turned on under the control of the South Bridge chipset. The south bridge chipset is an important part of the motherboard chipset. It is generally located on the motherboard far below the CPU slot. The south bridge chip is mainly responsible for the control of peripheral interfaces, IDE device control and additional functions. Correspondingly, pin 4 is connected as a hard disk indicator light, that is, the detection method of this embodiment can be used to detect the control circuit of the power indicator light of the motherboard, and pin 9 in this embodiment is the CTS (Clear To Send) of the COM interface 200 of the motherboard. , clear to send) pin. Since the detection method of the control circuit of the indicator light of the mainboard hard disk is similar to the above-mentioned execution steps, it will not be repeated here.

The detection method provided by another embodiment of the present invention can simultaneously detect the power supply control circuit of the motherboard and the hard disk control circuit, so as to further improve detection efficiency.

With reference to Fig. 2, Fig. 3, the detection method provided in the present embodiment also includes:

S40, providing the motherboard to be tested also includes the input terminal of the power supply 400, the resistor R2 and the switch Q2, the resistor R2 is connected between the input terminal of the power supply 400 and the pin 1 of the motherboard pin 100, and the switch Q2 is connected between the pin 3 of the motherboard pin 100 and the pin 1 of the motherboard pin 100. Between the ground potential, pin 1 and pin 3 are short-circuited, and pin 3 is connected to the second indicator light and pin 7 of the mainboard COM interface 200;

S50, control and close the switch Q2, and detect the signal state of the pin 7 to judge whether the resistor R2 is on according to the signal state of the pin 7;

S60 , after judging that the resistor R2 has been loaded, control the switch Q2 to be turned on, and detect the signal state of the pin 7 to determine whether the switch Q2 is loaded according to the signal state of the pin 7 .

Wherein, the detection of the signal state of the pin 9 is performed synchronously with the detection of the signal state of the pin 7 .

In this embodiment, step S40 and step S10 in the previous embodiment are performed synchronously and can be regarded as the same step. And the mainboard to be tested includes an embedded controller chip and a south bridge chipset at the same time. The control terminal of the switch Q1 is connected to the embedded controller chip to accept the control of the embedded controller chip to turn off or conduct, and the control terminal of the switch Q2 is connected to the south bridge chip. The bridge chipset is turned off or turned on under the control of the south bridge chipset.

In this embodiment, the control circuits of the power indicator light and the hard disk indicator light can be detected at the same time, so pin 3 and pin 4 of the corresponding motherboard pin 100 are respectively connected to the power indicator light and the hard disk indicator light. The pin 9 is one of the DSR pin and the CTS pin of the mainboard COM interface 200 , and the pin 7 is one of the DSR pin and the CTS pin of the mainboard COM interface 200 . That is, pin 9 is the DSR pin of the motherboard COM interface 200, then pin 7 is the CTS pin of the motherboard COM interface 200; or pin 9 is the CTS pin of the motherboard COM interface 200, then pin 7 is the motherboard COM interface 200 DSR pins.

In the several embodiments provided in this application, it should be understood that the disclosed system, device and/or method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be 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 invention.

Claims (10)

1. a kind of detection method of mainboard indication lamp control circuit, which is characterized in that including：

Mainboard to be measured is obtained, wherein the mainboard to be measured includes mainboard contact pin, mainboard com interface, the first power input, first Resistance and first switch, the first resistor be connected to first power input and the mainboard contact pin the first stitch it Between, the first switch is connected between the second stitch and earthing potential of the mainboard contact pin, first stitch and described Second pin-strapping, and the first pin of second stitch connection the first indicator light and the mainboard com interface；

Control closes the first switch and detects the signal condition of first pin with according to the signal of first pin First resistor described in condition adjudgement whether piece uploading；

Control is connected the first switch and detects the signal condition of first pin with according to the signal of first pin First switch described in condition adjudgement whether piece uploading.

2. the detection method of mainboard indication lamp control circuit as described in claim 1, which is characterized in that the mainboard to be measured is also Including embedded controller chip, the control terminal connection embedded controller chip of the first switch is described embedding to receive The control for entering formula controller chip is closed or is connected.

3. the detection method of mainboard indication lamp control circuit as claimed in claim 2, which is characterized in that second stitch connects First indicator light connect is power supply indicator.

4. the detection method of the mainboard indication lamp control circuit as described in claims 1 or 2 or 3, which is characterized in that described first Pin is the DSR pins of the mainboard com interface.

5. the detection method of mainboard indication lamp control circuit as described in claim 1, which is characterized in that the mainboard to be measured is also Including South Bridge chip group, the control terminal of the first switch connects the South Bridge chip group to receive the control of the South Bridge chip group System is closed or is connected.

6. the detection method of mainboard indication lamp control circuit as claimed in claim 5, which is characterized in that second stitch connects First indicator light connect is hard disk indication lamp.

7. the detection method of the mainboard indication lamp control circuit as described in claim 1 or 5 or 6, which is characterized in that described first Pin is the CTS pins of the mainboard com interface.

8. the detection method of mainboard indication lamp control circuit as described in claim 1, which is characterized in that the mainboard to be measured is also Including second source input terminal, second resistance and second switch, the second resistance be connected to the second source input terminal and Between the third stitch of the mainboard contact pin, the second switch is connected to the 4th stitch and earthing potential of the mainboard contact pin Between, the third stitch and the 4th pin-strapping, and the 4th stitch connects the second indicator light and the mainboard COM The second pin of interface；The detection method further includes：

Control closes the second switch and detects the signal condition of the second pin with according to the signal of the second pin Second resistance described in condition adjudgement whether piece uploading；

Control is connected the second switch and detects the signal condition of the second pin with according to the signal of the second pin Second switch described in condition adjudgement whether piece uploading；

Wherein, the signal condition progress synchronous with the signal condition of second pin is detected of first pin is detected.

9. the detection method of mainboard indication lamp control circuit as claimed in claim 8, which is characterized in that the mainboard to be measured is also Including embedded controller chip and South Bridge chip group, the control terminal of the first switch connects the embedded controller chip Control to receive the embedded controller chip is closed or is connected, and the control terminal of the second switch connects the south Bridge chip group is closed or is connected with the control for receiving the South Bridge chip group.

10. the detection method of mainboard indication lamp control circuit as claimed in claim 8 or 9, which is characterized in that described first refers to Show that lamp is power supply indicator, second indicator light is hard disk indication lamp, and first pin is the mainboard com interface One of DSR pins and CTS pins person, the second pin are it in the DSR pins and CTS pins of the mainboard com interface Another one.