CN105491375B - The test system and method and television set of a kind of product circuit plate - Google Patents
The test system and method and television set of a kind of product circuit plate Download PDFInfo
- Publication number
- CN105491375B CN105491375B CN201511003826.4A CN201511003826A CN105491375B CN 105491375 B CN105491375 B CN 105491375B CN 201511003826 A CN201511003826 A CN 201511003826A CN 105491375 B CN105491375 B CN 105491375B
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- Prior art keywords
- interface
- connector
- test
- circuit plate
- product
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers
Abstract
The invention discloses a kind of test system of product circuit plate and method and television set.The test system includes：Product circuit plate with connector；The product circuit plate also includes：Switching circuit and main circuit；The switching circuit includes：First interface, the second interface for treating ground pin connection with the connector；And the 3rd interface being connected with the measured signal of the main circuit；The switching circuit is used for, and when the first interface is empty, the connector treats that ground pin exports the measured signal of the main circuit, and when the first interface accesses power supply signal, the connector treats that ground pin is grounded.The present invention can be tested easily to measured signal.
Description
Technical field
The present invention relates to product test technology, the test system and method and TV of more particularly to a kind of product circuit plate
Machine.
Background technology
Current television set design can just put into volume production from holding case to volume production and can typically undergo several test manufacture stages.Test manufacture
Stage be in order to pinpoint the problems a little, and in time solve or increase countermeasure.The television set in test manufacture stage generally can all carry out aging
Test, and in the case of the high temperature, high humidity in aging, television set is it sometimes appear that failure, such as standby, blank screen, Hua Ping, deadlock
Situations such as, at this time with regard to needing to go to analyze.
There is (such as in HDMI or AV interface compatibilities software connecting interface in present television set peripheral interface
Software for Design), software information can be read in the case where not disassembling television rear shell, it is more convenient.And the measurement on hardware
With regard to cumbersome, it is necessary to which pulling down television rear shell could measure.Because bad phenomenon may disappear after failure machine power-off restarting
Lose, in order to keep bad phenomenon, analysis personnel can not power off takes out of burn-in chamber with going other point analysis by television set, can only be old
Change room and remain powered on down and disassemble rear shell and measured.Disassembled in such environment it is extremely difficult, also, burn-in chamber do not have it is special
Disassemble platform, the fixed screw on television rear shell is again relatively more, disassembles duration length, allow analyst with tear machine personnel's sweat stream open
Soak through the back of the body.And it is opposite if it is, there is a problem in low-temperature test it is necessary to disassemble operation in low-temperature cabinet, environment is also very
Badly.
The content of the invention
The test system and method and television set of a kind of product circuit plate provided by the invention, can be easily to be measured
Trial signal measures.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of test system of product circuit plate, the test system include：Product circuit plate with connector；
The product circuit plate also includes：Switching circuit and main circuit；
The switching circuit includes：First interface, the second interface for treating ground pin connection with the connector；And
The 3rd interface being connected with the measured signal of the main circuit；
The switching circuit is used for, and when the first interface is empty, the connector is treated described in ground pin output
The measured signal of main circuit, when the first interface accesses power supply signal, the connector treats that ground pin is grounded.
The switching circuit includes：Metal-oxide-semiconductor；The first end of the grid connection second resistance of the metal-oxide-semiconductor；The metal-oxide-semiconductor
Source ground；The first end of the drain electrode connection first resistor of the metal-oxide-semiconductor；Second end of the second resistance connects respectively
The first end of the first end of three resistance and the 4th resistance, the second end ground connection of the 4th resistance；
Second end of the 3rd resistor is the first interface of the switching circuit；The drain electrode of the metal-oxide-semiconductor is cut to be described
Change the second interface of circuit；Second end of the first resistor is the 3rd interface of the switching circuit.
The test system also includes：Test circuit plate, test point, the test point are provided with the test circuit plate
Ground pin connection is treated with the connector.
The product circuit plate is arranged in product shell, and the test circuit plate is arranged on outside the product shell.
The test point and the ground pin connection for the treatment of of the connector are specially：The test point and the connector
Treat that ground pin is connected by connecting line.
The connector is the connector of externally fed.
A kind of television set, the television set include the test system of described product circuit plate.
A kind of method of testing of product circuit plate, connector and main circuit are provided with the product circuit plate；Its feature
It is, methods described includes：
Switching circuit is set in the product circuit plate；The switching circuit includes：First interface and the connector
The second interface for treating ground pin connection；And the 3rd interface being connected with the measured signal of the main circuit；
Switch the input signal of the first interface so that when the first interface of the switching circuit is empty, institute
That states connector treats that ground pin exports the measured signal of the main circuit, when the first interface of the switching circuit accesses
During power supply signal, the connector treats that ground pin is grounded.
Described method of testing, in addition to：
One test circuit plate is set, test point, the test point and the connector are provided with the test circuit plate
Treat ground pin connection so that by measure the signal of the test point measure the connector treat ground pin export
Corresponding signal.
The switching circuit includes：Metal-oxide-semiconductor；The first end of the grid connection second resistance of the metal-oxide-semiconductor；The metal-oxide-semiconductor
Source ground；The first end of the drain electrode connection first resistor of the metal-oxide-semiconductor；Second end of the second resistance connects respectively
The first end of the first end of three resistance and the 4th resistance, the second end ground connection of the 4th resistance；
Second end of the 3rd resistor is the first interface of the switching circuit；The drain electrode of the metal-oxide-semiconductor is cut to be described
Change the second interface of circuit；Second end of the first resistor is the 3rd interface of the switching circuit.
The beneficial effect of the embodiment of the present invention is：
The test system of product circuit plate disclosed in the embodiment of the present invention, the defeated of ground pin is treated by test connector
Go out signal, easily the measured signal of main circuit in circuit board accordingly can be tested.
Brief description of the drawings
Fig. 1 is the connection diagram of the test system of product circuit plate provided in an embodiment of the present invention；
Fig. 2 be product circuit plate provided in an embodiment of the present invention test system in switching circuit circuit diagram；
Fig. 3 is HDMI of the prior art connection diagram；
Fig. 4 is the connection diagram of the pin 2 of HDMI in the test system of product circuit plate in the embodiment of the present invention；
Fig. 5 is the schematic diagram of the method for testing of product circuit plate provided in an embodiment of the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
As shown in figure 1, for a kind of test system of product circuit plate of the present invention, the test system includes：Tool
There is the product circuit plate 11 of connector 111；
The product circuit plate 11 also includes：Switching circuit 112 and main circuit 113；Main circuit can be product circuit plate
Miscellaneous part in 11 in addition to switching circuit 112.
The switching circuit 112 includes：First interface, the second interface for treating ground pin connection with the connector；
And the 3rd interface being connected with the measured signal of the main circuit.
The switching circuit 112 is used for, and when switching the input signal of the first interface, the connector is waited to be grounded
Pin exports corresponding signal.
It is described when switching the input signal of the first interface, the connector treats the corresponding letter of ground pin output
Number be specially：
When the first interface is empty, the connector treats that ground pin exports the measured signal of the main circuit；
When the first interface accesses power supply signal, the connector treats that ground pin is grounded.
So, can be easily to the main circuit by testing the output signal for treating ground pin of the connector
Measured signal accordingly tested.That is, connector can connect different external equipments, as the circuit board
Custom interface is used or used as the test interface of the circuit board.
As shown in Fig. 2 the switching circuit 112 includes：Metal-oxide-semiconductor Q1；The grid connection second resistance R2 of the metal-oxide-semiconductor Q1
First end；The source ground of the metal-oxide-semiconductor Q1；The drain electrode connection first resistor R1 of metal-oxide-semiconductor Q1 first end；Described
Two resistance R2 the second end connects 3rd resistor R3 first end and the 4th resistance R4 first end, the 4th resistance R4 respectively
The second end ground connection；
The second end of the 3rd resistor R3 is the first interface of the switching circuit；The drain electrode of the metal-oxide-semiconductor Q1 is institute
State the second interface of switching circuit；The second end of the first resistor R1 is the 3rd interface of the switching circuit 112.
The test system also includes：Test circuit plate 12, test point, the survey are provided with the test circuit plate 12
Pilot treats ground pin connection with the connector 111.
The product circuit plate 11 is arranged in product shell, and the test circuit plate is arranged on outside the product shell.
When product is television set, the television set includes test system, and product circuit plate is arranged in television cabin body, the test
It is external that circuit board is arranged on institute's television cabin.So, when test circuit plate is connected with product circuit plate, it may not be necessary to take apart
Housing, by measuring the signal of the test point on the circuit board, it can measure to obtain the signal in product circuit plate.
The test point and the ground pin connection for the treatment of of the connector are specially：The test point and the connector
Treat that ground pin is connected by connecting line.
The connector is the connector of externally fed.That is, power supply signal to be connected in the connector
The power supply signal of pin is not the power supply signal supply in product circuit plate, but the other equipment connected by product circuit plate
Supply.
The connector is high-definition multimedia HDMI or Video Graphics Array USB interface.Accordingly, connecting line
Can be HDMI connecting lines or VGA connecting lines.
The present invention also provides a kind of television set, and the television set includes the test system of above-mentioned product circuit plate.This hair
The bright quick auxiliary repair for exempting to tear open housing that can apply to product, improved below with the HDMI on TV SKD circuit
Exemplified by illustrate, other equipment has this also general principle (such as display etc.) of HDMI mouths, and other ports can also do similar
Design (such as USB interface).
A kind of television set is described below to exempt to tear the application scenarios of the test system of the quick auxiliary repair of rear shell open.It is a kind of quick
The test system of signal in product circuit plate is measured, in the design basis of original circuit board, is exposed in the periphery of television set
Connector interface circuit design on add new circuit function, the circuit part newly increased coordinates aerial lug to insert again
The test circuit plate entered, directly it can be measured on the test circuit plate of periphery connection to required signal and without tearing machine point open
When analysing, and be not inserted into test circuit plate, the connector of television set can also keep original function constant.
As shown in figure 3, defined for the HDMI normal interfaces of television set of the prior art；In HDMI, 2,5,8,11,
17 be all to treat ground pin, and earth signal is connected in being commonly designed.
HDMI design after improvement in the present invention is as shown in Figure 4.
In Fig. 4, signal HDMI-5V voltages are that external equipment is powered to TV.When needing to use the normal of TV
During HDMI mouths, after inserting HDMI wire, external equipment can power to TV, and HDMI-5V can open metal-oxide-semiconductor Q1, now HDMI-2
Pin is connected on the ground, is consistent with normal HDMI functions pin.
If connection is not externally fed equipment, now signal HDMI-5V is no voltage, and Q1 is not turned on, HDMI-
The connection of 2 pin is exactly signal 1 to be measured.
Same reason, increases a few set metal-oxide-semiconductors, and difference can use HMDI-5 pin measurement signal 2, HDMI-8 pin measurement signals
3, HMDI-11 pin measurement signals 4, HDMI-17 pin measurement signal 5.
So, a PCB tools platelet is added (equivalent to above-mentioned test electricity with a HDMI wire outside product circuit plate
Road plate), there is test point on PCB tool platelets, test point and pin 2,5,8,11,17 of HMDI lines etc. are connected, so, directly can be with
Measured on the PCB tool platelets of outside to the signal on HDMI2,5,8,11,17, this signal and want what is measured according to user
Signal arbitrarily can be configured change in TV motherboard (equivalent to above-mentioned product circuit plate).
By taking television set as an example, necessary voltage measurement can be carried out, for example, 3.3V, 5V, 1.2V, power on signal,
12V, backlight on/off signals and other users want the signal measured.
Because there may be 2 even 3 HDMI mouths, these interfaces to do similar designs on product circuit plate, so
The signal that user can measure will be a lot.
In addition, this Analysis of Nested Design can use in the research and development test manufacture stage, if in the follow-up volume production stage, can pass through electricity as above
Component whether paster and HMDI original states can be changed into.By taking Fig. 4 as an example, when test manufacture, R1, R2, R3, R4, Q1 can with piece uploading,
And R5 not piece uploadings；Contrast when volume production, the resistance of a R15 piece uploadings 0ohm, other not piece uploadings.
The present invention solves and must tear casing open in the prior art and carry out the shortcomings that analysis measures hardware signal, can allow analysis
Person designs by this invention, quickly and easily measures the baseband signal (above-mentioned measured signal) in product circuit plate, convenient
It is laborsaving, without disassembling television rear shell, reduce the activity duration in adverse circumstances, save and tear open the machine time, improve work effect
Rate.
As shown in figure 5, being a kind of method of testing of product circuit plate of the present invention, set on the product circuit plate
There are connector and main circuit；Methods described includes：
Step 51, switching circuit is set in the product circuit plate；The switching circuit includes：First interface and institute
State the second interface for treating ground pin connection of connector；And the 3rd interface being connected with the measured signal of the main circuit；
Step 52, the input signal of the first interface is switched so that the connector treats that ground pin output is corresponding
Signal.
Step 52 is specially：
When the first interface is empty, the connector treats that ground pin exports the measured signal of the main circuit；
When the first interface accesses power supply signal, the connector treats that ground pin is grounded.
Described method of testing, in addition to：
Step 53, a test circuit plate is set, is provided with test point on the test circuit plate, the test point with it is described
Connector treats ground pin connection so that treats ground pipe by measuring the signal of the test point measure the connector
The corresponding signal of pin output.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent substitution and improvements made within the spirit and principles in the present invention etc., are all contained in protection scope of the present invention
It is interior.
Claims (8)
1. a kind of test system of product circuit plate, it is characterised in that the test system includes：Product electricity with connector
Road plate；
The product circuit plate also includes：Switching circuit and main circuit；
The switching circuit includes：First interface, the second interface for treating ground pin connection with the connector；And with institute
State the 3rd interface of the measured signal connection of main circuit；
The switching circuit is used for, and when the first interface is empty, the connector treats that ground pin exports the main electricity
The measured signal on road, when the first interface accesses power supply signal, the connector treats that ground pin is grounded；The connection
Device uses as the custom interface of the product circuit plate, or, the test interface as the product circuit plate uses；
The switching circuit includes：Metal-oxide-semiconductor；The first end of the grid connection second resistance of the metal-oxide-semiconductor；The source of the metal-oxide-semiconductor
Pole is grounded；The first end of the drain electrode connection first resistor of the metal-oxide-semiconductor；Second end of the second resistance connects the 3rd electricity respectively
The first end of the first end of resistance and the 4th resistance, the second end ground connection of the 4th resistance；
Second end of the 3rd resistor is the first interface of the switching circuit；The drain electrode of the metal-oxide-semiconductor is the switching electricity
The second interface on road；Second end of the first resistor is the 3rd interface of the switching circuit.
2. test system according to claim 1, it is characterised in that the test system also includes：Test circuit plate, institute
State and test point is provided with test circuit plate, the test point treats ground pin connection with the connector.
3. test system according to claim 2, it is characterised in that the test point treats ground pipe with the connector
Pin connects：The test point treats that ground pin is connected by connecting line with the connector.
4. test system according to claim 1, it is characterised in that the product circuit plate is arranged in product shell,
The test circuit plate is arranged on outside the product shell.
5. test system according to claim 1, it is characterised in that the connector is the connector of externally fed.
6. a kind of television set, it is characterised in that the television set includes the product electricity described in claim 1-5 any claims
The test system of road plate.
7. a kind of method of testing of product circuit plate, it is characterised in that be provided with connector and main electricity on the product circuit plate
Road；Characterized in that, methods described includes：
Switching circuit is set in the product circuit plate；The switching circuit includes：First interface, treat with the connector
The second interface of ground pin connection；And the 3rd interface being connected with the measured signal of the main circuit；
Switch the input signal of the first interface so that when the first interface of the switching circuit is empty, the company
Connect device treats that ground pin exports the measured signal of the main circuit, when the first interface of the switching circuit accesses power supply
During signal, the connector treats that ground pin is grounded；The connector uses as the custom interface of the product circuit plate,
Or used as the test interface of the product circuit plate；
The switching circuit includes：Metal-oxide-semiconductor；The first end of the grid connection second resistance of the metal-oxide-semiconductor；The source of the metal-oxide-semiconductor
Pole is grounded；The first end of the drain electrode connection first resistor of the metal-oxide-semiconductor；Second end of the second resistance connects the 3rd electricity respectively
The first end of the first end of resistance and the 4th resistance, the second end ground connection of the 4th resistance；
Second end of the 3rd resistor is the first interface of the switching circuit；The drain electrode of the metal-oxide-semiconductor is the switching electricity
The second interface on road；Second end of the first resistor is the 3rd interface of the switching circuit.
8. method of testing according to claim 7, it is characterised in that also include：
One test circuit plate is set, test point is provided with the test circuit plate, the test point is treated with the connector
Ground pin connection so that measure the phase treated ground pin and exported of the connector by measuring the signal of the test point
Induction signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511003826.4A CN105491375B (en) | 2015-12-28 | 2015-12-28 | The test system and method and television set of a kind of product circuit plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511003826.4A CN105491375B (en) | 2015-12-28 | 2015-12-28 | The test system and method and television set of a kind of product circuit plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105491375A CN105491375A (en) | 2016-04-13 |
| CN105491375B true CN105491375B (en) | 2018-02-16 |
Family
ID=55678049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511003826.4A Active CN105491375B (en) | 2015-12-28 | 2015-12-28 | The test system and method and television set of a kind of product circuit plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105491375B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107015555B (en) * | 2017-04-25 | 2019-08-16 | 歌尔股份有限公司 | A kind of interactive signal test device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM343163U (en) * | 2008-04-14 | 2008-10-21 | Princeton Technology Corp | Testing circuit board |
| CN201577167U (en) * | 2010-01-04 | 2010-09-08 | 青岛海信电器股份有限公司 | Circuit board selectively-cutting testing circuit and a television testing circuit |
| CN201839390U (en) * | 2010-07-16 | 2011-05-18 | 上海研祥智能科技有限公司 | Video signal test device |
| CN102256158B (en) * | 2011-07-29 | 2013-08-14 | 广州视源电子科技股份有限公司 | Automatic television circuit board function testing method and system |
| CN103581663B (en) * | 2012-08-03 | 2015-07-29 | 展讯通信（上海）有限公司 | The method of testing of circuit board and system |
| CN104679616A (en) * | 2013-11-28 | 2015-06-03 | 鸿富锦精密工业（深圳）有限公司 | Device and method for testing 1-wire signals |
| CN103647967B (en) * | 2013-12-25 | 2015-12-09 | 青岛乾程电子科技有限公司 | A kind of TV set-top box front control board automatic test approach |
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2015
- 2015-12-28 CN CN201511003826.4A patent/CN105491375B/en active Active
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| Publication number | Publication date |
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| CN105491375A (en) | 2016-04-13 |
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Address after: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Applicant after: Goertek Inc. Address before: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Applicant before: Goertek Inc. |
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