CN110677642A - Television fault online detection method and device based on LED indicator lamp - Google Patents
Television fault online detection method and device based on LED indicator lamp Download PDFInfo
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- CN110677642A CN110677642A CN201911121399.8A CN201911121399A CN110677642A CN 110677642 A CN110677642 A CN 110677642A CN 201911121399 A CN201911121399 A CN 201911121399A CN 110677642 A CN110677642 A CN 110677642A
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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
- H04N17/004—Diagnosis, testing or measuring for television systems or their details for digital television systems
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/02—Monitoring continuously signalling or alarm systems
- G08B29/06—Monitoring of the line circuits, e.g. signalling of line faults
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
- G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
- G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
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Abstract
The invention discloses an LED indicator lamp-based television fault online detection method and device, which are used for analyzing circuit signals of various common fault states of a television, extracting characteristic signals with pertinence, and building a detection circuit which is suitable for a single-input or multi-input switch circuit to control the LED state according to the characteristic signals, wherein the characteristic signals can trigger the state change of LED indicator lamps when a fault occurs, and the fault state and the type of the television can be accurately and quickly diagnosed through the states of one or more LED indicator lamps.
Description
Technical Field
The invention relates to the technical field of television fault detection, in particular to an LED indicator lamp-based television fault online detection method and device.
Background
With the rapid development of electronic technology, televisions are more and more complex and precise, and the technology changes day by day, which brings more and more difficulty to the fault detection of the televisions.
In the traditional method for checking the fault of the television, firstly, an accurate circuit topological graph of the television needs to be found and comprehensively analyzed, then, circuit point positions of the television are measured through instruments such as a universal meter, an oscilloscope and the like, and are compared and analyzed with the circuit topological graph, and finally, a result can be obtained.
Disclosure of Invention
The invention aims to provide an LED indicator lamp-based television fault online detection method and device, which can quickly judge the type of a television fault according to the indication state of an LED lamp by online detection without other detection equipment and technicians, and overcome the defects of complex process, high technical requirement and low efficiency of the conventional television fault detection.
The technical scheme adopted by the invention is as follows:
a television fault on-line detection device based on LED indicator lamps comprises power supply detection circuits and signal detection circuits, wherein the number of the power supply detection circuits corresponds to the number of power supply circuits to be detected, each power supply detection circuit comprises a voltage division resistor and a power supply indicator lamp which are connected in series, and the power supply circuits to be detected are grounded after being connected in series with the power supply indicator lamps through the voltage division resistors;
the signal detection circuit comprises a signal indicator light and a switching circuit based on a triode; the switch circuit comprises a grounding end, a signal indicator lamp connecting end and a control end; one end of the signal indicator lamp is connected with the positive electrode of the power supply, the other end of the signal indicator lamp is connected with the signal indicator lamp connecting end of the switch circuit, and the grounding end of the switch circuit is grounded; the characteristic signal is connected to the control end of the switch circuit and controls the on-off of the switch circuit.
Further, the characteristic signals are analyzed and extracted based on the circuit signals in the common fault state, and the characteristic signals are one or more.
Furthermore, the switch circuit comprises an IC controller and a triode, the IC controller is provided with an input port corresponding to the number of the characteristic signals to be detected, the output end of the IC controller is connected with the base electrode of the triode through a first resistor, the collector electrode of the triode is connected with one end of a signal indicating lamp, the other end of the signal indicating lamp is connected with the positive electrode of a power supply through a second resistor, and the emitting electrode of the triode is grounded.
Furthermore, when the characteristic signal is one, the switching circuit is composed of a triode, the characteristic signal to be detected is connected with the base electrode of the triode through a first resistor, the collector electrode of the triode is connected with one end of a signal indicating lamp, the other end of the signal indicating lamp is connected with the positive electrode of a power supply through a second resistor, and the emitting electrode of the triode is grounded.
Further, when the characteristic signals are two, the switching circuit comprises a first triode and a second triode, a collector of the first triode is connected with one end of the signal indicator lamp, the other end of the signal indicator lamp is connected with the positive electrode of the power supply through a second resistor, an emitter of the first triode is connected with a collector of the second triode, an emitter of the second triode is grounded, and bases of the first triode and the second triode are respectively connected with one characteristic signal to be detected.
Furthermore, the number of the power supply detection circuits is three, the number of the signal detection circuits is five, one power supply detection circuit is connected to a power supply board to mainboard power supply circuit, and the power supply indicator lamp of the power supply circuit is marked as LED1, the other power supply detection circuit is connected to a USB power supply circuit, and the power supply indicator lamp of the power supply circuit is marked as LED2, and the last power supply detection circuit is connected to the mainboard to panel power supply circuit, and the power supply indicator lamp of the power supply circuit is marked as LED 3.
The first signal detection circuit is used for diagnosing transmission signals of videos between the Scaler and the FRC and marking the signal indicator lamp as an LED 4; the second path of signal detection circuit is used for diagnosing the transmission signal of the OSD between the Scaler and the FRC and marking the signal indicator lamp as an LED 5; the third signal detection circuit is used for transmitting signals between the FRC and the panel by the diagnostic video and the OSD and recording the signal indicator lamp as an LED 6; the fourth signal detection circuit is used for diagnosing the reset IC signal and marking the signal indicator lamp as an LED 7; the fifth signal detection circuit is used for diagnosing the control signal of the scaler and marking the signal indicator lamp as the LED 8.
A television fault online detection method based on an LED indicator lamp comprises the following steps:
step 1, analyzing circuit signals of various common fault states of a television and extracting a targeted characteristic signal;
step 2, constructing a detection circuit based on the detection characteristic signal, accessing the power supply circuit to be detected into a corresponding power supply detection circuit, and simultaneously accessing the characteristic signal to be detected into a corresponding signal detection circuit;
and 3, judging the television fault type based on the bright state, the dark state and the flashing state of the indicator light of each detection circuit.
Further, in the step 2, the power supply board accesses a power supply detection circuit to the main board power supply circuit and records the power supply indicator lamp of the power supply detection circuit as an LED 1; the USB power supply circuit is connected with another power supply detection circuit, the power supply indicator lamp of the circuit is marked as an LED2, and the main board is connected with another power supply detection circuit to the panel power supply circuit, and the power supply indicator lamp of the circuit is marked as an LED 3.
The characteristic signal of the video transmitted between the Scaler and the FRC is accessed into a first path of signal detection circuit, and a signal indicator light of the first path is marked as an LED 4; the characteristic signal transmitted by the OSD between the Scaler and the FRC is accessed into a second path of signal detection circuit, and the signal indicator light is marked as an LED 5; the characteristic signals transmitted between the FRC and the panel by the video and the OSD are connected into a third signal detection circuit, and a signal indicator light of the third signal detection circuit is marked as an LED 6; the characteristic signal of the reset IC is connected into a fourth signal detection circuit, and a signal indicator light of the fourth signal detection circuit is marked as an LED 7; and the control signal of the scaler is connected into the fifth signal detection circuit, and the signal indicator lamp is marked as the LED 8.
Further, the specific fault determination method in step 3 is as follows:
step 3-1, firstly checking whether the LED1 lamp is normally displayed; if so, the power panel is normal and the step 3-2 is executed; otherwise, if the LED1 is not bright or flickers, the power panel is judged to be abnormal and fault detection is ended;
step 3-2, checking whether the LED2 lamp displays normally; if so, the mainboard supplies power normally and executes the step 3-4; otherwise, executing step 3-3;
step 3-3, checking whether the LED3 lamp displays normally; if so, judging that the SCALER is abnormal while the power supply of the main board is abnormal; otherwise, determining that the power supply of the main board is abnormal and finishing fault detection;
3-4, checking whether the LED7 lamp is normally displayed; if yes, judging that the reset IC is normal and executing the step 3-5; otherwise, judging that a fault exists and determining the fault type based on the LED7 display status condition;
3-5, checking whether the LED8 lamp is normally displayed; if yes, executing step 3-6; otherwise, the software program is updated to judge whether the software program is normal, and if the LED8 is not bright after updating, the Scaler is judged to be abnormal and the fault detection is ended;
3-6, checking whether the LED4 lamp is normally displayed; if yes, executing step 3-7; otherwise, checking whether the transmission line between the Scaler and the FRC is normal, judging that the video module is abnormal when the transmission line is normal, updating the software program and the Scaler, and then finishing fault detection;
3-7, checking whether the LED5 lamp is normally displayed; if yes, executing step 3-8; otherwise, checking whether the transmission line between the Scaler and the FRC is normal, and preliminarily judging whether a software program or a Scaler problem exists when the transmission line is normal to finish fault detection;
3-8, checking whether the LED6 lamp is normally displayed; if so, the television has no fault and finishes the fault detection; otherwise, checking whether the transmission line between the FRC and the panel is normal, and judging that the FRC is abnormal when the transmission line is normal.
Further, when the LED7 is not on in step 3-4, it is determined that the reset IC is abnormal; when the LED7 flickers, other abnormalities are judged, software, FRC, Scaler and panel abnormalities are checked in sequence to determine a fault point, and then fault detection is finished.
Further, in the step 3-7, the LED5 lamp is not turned on, and the software program or the scaler is updated correspondingly after the software program or the scaler is preliminarily judged to be in problem when the transmission line is normal.
By adopting the technical scheme, an additional measuring instrument is not needed, and real-time detection in the normal operation process is not needed, and real-time online detection and feedback are realized; the fault type and the maintenance can be obtained according to the state of the indicator lamp when the power is on; the pertinence of the characteristic signals selected according to fault analysis and the detection circuit is strong, and the detection circuit directly Layout has high accuracy and reliability on the characteristic signals on the circuit board: and the detection circuit is simple, the consumption of materials and energy is low, and the practicability is strong. The invention overcomes the states of complex process, high technical requirement and low efficiency of television fault detection. The invention can not only simply and rapidly detect the fault, but also carry out online real-time detection.
Drawings
The invention is described in further detail below with reference to the accompanying drawings and the detailed description;
FIG. 1 is a schematic diagram of a signal detection circuit for detecting one or more characteristic signals according to the present invention;
FIG. 2 is a simplified signal detection circuit for a signature signal according to the present invention;
FIG. 3 is a simplified signal detection circuit for two characteristic signals according to the present invention;
FIG. 4 is a schematic view of a flow structure of a method for online detection of television faults based on LED indicator lights according to the present invention;
fig. 5 is a schematic flow chart of the specific fault determination of the present invention.
Detailed Description
The invention relates to a television fault online detection method based on an LED (light emitting diode), which is characterized in that circuit signals under various common fault states of a television are analyzed, targeted characteristic signals are extracted, a detection circuit which is suitable for a single-input or multi-input switch circuit to control the LED state is built according to the characteristic signals, the characteristic signals can trigger the state change of an LED indicator lamp when a fault occurs, and the fault state and the type of the television can be accurately and quickly diagnosed through the state of one or more LED indicator lamps.
As shown in one of fig. 1 to 5, the present invention discloses an on-line detection device for a television fault based on an LED indicator, which includes a power supply detection circuit and a signal detection circuit, wherein the number of the power supply detection circuits corresponds to the number of power supply circuits to be detected, each power supply detection circuit includes a voltage dividing resistor and a power supply indicator connected in series, and the power supply circuit to be detected is connected in series with the power supply indicator through the voltage dividing resistor and then grounded.
The signal detection circuit comprises a signal indicator light and a switching circuit based on a triode; the switch circuit comprises a grounding end, a signal indicator lamp connecting end and a control end; one end of the signal indicator light LED is connected with a power supply anode VCC, the other end of the signal indicator light LED is connected with a signal indicator light connecting end of the switch circuit, and the grounding end of the switch circuit is grounded; the characteristic signal is connected to the control end of the switch circuit and controls the on-off of the switch circuit.
Furthermore, the characteristic signals are obtained by analyzing and extracting the circuit signals based on the common fault state, and the number of the characteristic signals is more than one. The detection circuit determines the on-off of the adaptive switch circuit according to the high and low levels of one characteristic signal or a plurality of characteristic signals, and further controls the on-off of the LED to directly reflect the state of the detected circuit.
Further, the switch circuit comprises an IC controller and a triode BJT1, the IC controller has an input port corresponding to the number of the characteristic signals to be detected, the output terminal of the IC controller is connected to the base of the triode BJT1 through a first resistor R1, the collector of the triode BJT1 is connected to one end of a signal indicator LED, the other end of the signal indicator LED is connected to the positive power supply VCC through a second resistor R2, and the emitter of the triode BJT1 is grounded.
Further, when the characteristic signal is one, the switch circuit includes a transistor BJT1, the characteristic signal to be detected is connected to the base of the transistor BJT1 through a first resistor R1, the collector of the transistor BJT1 is connected to one end of a signal indicator LED, the other end of the signal indicator LED is connected to the positive electrode VCC of the power supply through a second resistor R2, and the emitter of the transistor BJT1 is grounded.
Further, when the characteristic signals are two, the switch circuit includes a first transistor BJT1 and a second transistor BJT2, a collector of the first transistor BJT1 is connected to one end of the signal indicator LED, the other end of the signal indicator LED is connected to the positive power supply VCC through a second resistor R2, an emitter of the first transistor BJT1 is connected to a collector of the second transistor BJT2, an emitter of the second transistor BJT2 is grounded, one characteristic signal to be measured is connected to a base of the first transistor BJT1 through a resistor R1, and the other characteristic signal to be measured is connected to a base of the second transistor BJT2 through a resistor R3.
Further, as a preferred embodiment, the invention selects eight specific characteristic signals, and diagnoses the major faults of the television by matching with eight detection circuits arranged on the LED indicator lamps of the main board.
The point locations of the eight LEDs on the main board and the television fault types represented by the respective independent states:
powerboard LED1 indicator: diagnosing whether the power supply board normally supplies power to the mainboard;
USD-LED2 indicator: diagnosing whether the USB power supply is normal;
3.+12V-disp LED3 indicator: diagnosing whether the power supply of the main board to the panel is normal;
SOC-LOCKn LED4 indicator: diagnosing whether the transmission of the video between the Scaler and the FRC is normal;
GFX-LOCKn LED5 indicator: diagnosing whether transmission of the OSD between the Scaler and the FRC is normal;
NT-LOCKn LED6 indicator: diagnosing whether the transmission of the video and the OSD between the FRC and the panel is normal;
BE-RESETn LED7 indicator: diagnosing whether the reset IC is normal;
android OK LED8 indicator: and diagnosing whether the scaler operates normally.
Specifically, the power supply detection circuits of the detection circuits are three, the signal detection circuits are five, one power supply detection circuit is connected to a power supply board to mainboard power supply circuit and records the power supply indicator lamp of the circuit as LED1, the other power supply detection circuit is connected to a USB power supply circuit and records the power supply indicator lamp of the circuit as LED2, and the last power supply detection circuit is connected to the mainboard to panel power supply circuit and records the power supply indicator lamp of the circuit as LED 3.
The first signal detection circuit is used for diagnosing transmission signals of videos between the Scaler and the FRC and marking the signal indicator light LED as an LED 4; the second path of signal detection circuit is used for diagnosing the transmission signal of the OSD between the Scaler and the FRC and marking the signal indicator light LED as an LED 5; the third signal detection circuit is used for transmitting signals between the FRC and the panel by the diagnostic video and the OSD and recording the signal indicator lamp LED as an LED 6; the fourth signal detection circuit is used for diagnosing the reset IC signal and marking the signal indicator light LED as an LED 7; the fifth signal detection circuit is used for diagnosing the control signal of the scaler and marking the signal indicator LED as the LED 8.
The structure is simplest to use on the premise of ensuring reliability, and is more convenient to put into production and use. The detection structure is low in production cost, high in practicability, rapid and comprehensive in diagnosis and high in reliability, and is put into practical production and use at present.
A television fault online detection method based on an LED indicator lamp comprises the following steps:
step 1, analyzing circuit signals of various common fault states of a television and extracting a targeted characteristic signal;
step 2, constructing a detection circuit based on the detection characteristic signal, accessing the power supply circuit to be detected into a corresponding power supply detection circuit, and simultaneously accessing the characteristic signal to be detected into a corresponding signal detection circuit;
and 3, judging the television fault type based on the bright state, the dark state and the flashing state of the indicator light of each detection circuit.
Further, by adopting the detection circuit of the preferred embodiment, in the step 2 of the invention, the power supply board accesses a power supply detection circuit to the main board power supply circuit and records the power supply indicator lamp of the power supply detection circuit as the LED 1; the USB power supply circuit is connected with another power supply detection circuit, the power supply indicator lamp of the circuit is marked as an LED2, and the main board is connected with another power supply detection circuit to the panel power supply circuit, and the power supply indicator lamp of the circuit is marked as an LED 3.
The characteristic signal of the video transmitted between the Scaler and the FRC is accessed into a first path of signal detection circuit, and a signal indicator light of the first path is marked as an LED 4; the characteristic signal transmitted by the OSD between the Scaler and the FRC is accessed into a second path of signal detection circuit, and the signal indicator light is marked as an LED 5; the characteristic signals transmitted between the FRC and the panel by the video and the OSD are connected into a third signal detection circuit, and a signal indicator light of the third signal detection circuit is marked as an LED 6; the characteristic signal of the reset IC is connected into a fourth signal detection circuit, and a signal indicator light of the fourth signal detection circuit is marked as an LED 7; and the control signal of the scaler is connected into the fifth signal detection circuit, and the signal indicator lamp is marked as the LED 8.
Further, the specific fault determination method in step 3 is as follows:
step 3-1, firstly checking whether the LED1 lamp is normally displayed; if so, the power panel is normal and the step 3-2 is executed; otherwise, if the LED1 is not bright or flickers, the power panel is judged to be abnormal and fault detection is ended;
step 3-2, checking whether the LED2 lamp displays normally; if so, the mainboard supplies power normally and executes the step 3-4; otherwise, executing step 3-3;
step 3-3, checking whether the LED3 lamp displays normally; if so, judging that the SCALER is abnormal while the power supply of the main board is abnormal; otherwise, determining that the power supply of the main board is abnormal and finishing fault detection;
3-4, checking whether the LED7 lamp is normally displayed; if yes, judging that the reset IC is normal and executing the step 3-5; otherwise, judging that a fault exists and determining the fault type based on the LED7 display status condition;
3-5, checking whether the LED8 lamp is normally displayed; if yes, executing step 3-6; otherwise, the software program is updated to judge whether the software program is normal, and if the LED8 is not bright after updating, the Scaler is judged to be abnormal and the fault detection is ended;
3-6, checking whether the LED4 lamp is normally displayed; if yes, executing step 3-7; otherwise, checking whether the transmission line between the Scaler and the FRC is normal, judging that the video module is abnormal when the transmission line is normal, updating the software program and the Scaler, and then finishing fault detection;
3-7, checking whether the LED5 lamp is normally displayed; if yes, executing step 3-8; otherwise, checking whether the transmission line between the Scaler and the FRC is normal, and preliminarily judging whether a software program or a Scaler problem exists when the transmission line is normal to finish fault detection;
3-8, checking whether the LED6 lamp is normally displayed; if so, the television has no fault and finishes the fault detection; otherwise, checking whether the transmission line between the FRC and the panel is normal, and judging that the FRC is abnormal when the transmission line is normal.
Further, when the LED7 is not on in step 3-4, it is determined that the reset IC is abnormal; when the LED7 flickers, other abnormalities are judged, software, FRC, Scaler and panel abnormalities are checked in sequence to determine a fault point, and then fault detection is finished.
Further, in the step 3-7, the LED5 lamp is not turned on, and the software program or the scaler is updated correspondingly after the software program or the scaler is preliminarily judged to be in problem when the transmission line is normal.
By adopting the technical scheme, an additional measuring instrument is not needed, and real-time detection in the normal operation process is not needed, and real-time online detection and feedback are realized; the fault type and the maintenance can be obtained according to the state of the indicator lamp when the power is on; the pertinence of the characteristic signals selected according to fault analysis and the detection circuit is strong, and the detection circuit directly Layout has high accuracy and reliability on the characteristic signals on the circuit board: and the detection circuit is simple, the consumption of materials and energy is low, and the practicability is strong. The invention overcomes the states of complex process, high technical requirement and low efficiency of television fault detection. The invention can not only simply and rapidly detect the fault, but also carry out online real-time detection.
Claims (10)
1. The utility model provides a TV trouble on-line measuring device based on LED pilot lamp which characterized in that: the power supply detection circuit comprises power supply detection circuits and signal detection circuits, the number of the power supply detection circuits corresponds to the number of power supply circuits to be detected, each power supply detection circuit comprises a divider resistor and a power supply indicator lamp which are connected in series, and the power supply circuits to be detected are grounded after being connected in series with the power supply indicator lamps through the divider resistors;
each signal detection circuit comprises a signal indicator light and a switching circuit based on a triode; the switch circuit comprises a grounding end, a signal indicator lamp connecting end and a control end; one end of the signal indicator lamp is connected with the positive electrode of the power supply, the other end of the signal indicator lamp is connected with the signal indicator lamp connecting end of the switch circuit, and the grounding end of the switch circuit is grounded; the characteristic signal is connected to the control end of the switch circuit and controls the on-off of the switch circuit.
2. The LED indicator lamp-based television fault online detection device according to claim 1, characterized in that: the characteristic signals are obtained by analyzing and extracting the circuit signals under the common fault state, and the characteristic signals are one or more.
3. The LED indicator lamp-based television fault online detection device according to claim 1, characterized in that: the switching circuit comprises an IC controller and a triode, the IC controller is provided with an input port corresponding to the number of characteristic signals to be detected, the output end of the IC controller is connected with the base electrode of the triode through a first resistor, the collector electrode of the triode is connected with one end of a signal indicating lamp, the other end of the signal indicating lamp is connected with the positive electrode of a power supply through a second resistor, and the emitting electrode of the triode is grounded.
4. The LED indicator lamp-based television fault online detection device according to claim 1, characterized in that: when the characteristic signal is one, the switching circuit is composed of a triode, the characteristic signal to be detected is connected with the base electrode of the triode through a first resistor, the collector electrode of the triode is connected with one end of a signal indicator lamp, the other end of the signal indicator lamp is connected with the positive electrode of a power supply through a second resistor, and the emitting electrode of the triode is grounded.
5. The LED indicator lamp-based television fault online detection device according to claim 1, characterized in that: when the characteristic signals are two, the switching circuit comprises a first triode and a second triode, the collector of the first triode is connected with one end of the signal indicator lamp, the other end of the signal indicator lamp is connected with the positive electrode of the power supply through a second resistor, the emitter of the first triode is connected with the collector of the second triode, the emitter of the second triode is grounded, and the bases of the first triode and the second triode are respectively connected with one characteristic signal to be detected.
6. The LED indicator lamp-based television fault online detection device according to claim 1, characterized in that: 8 detection circuits are directly arranged on a mainboard to realize online detection, three power supply detection circuits are provided, five signal detection circuits are provided, one power supply detection circuit is connected with a power supply board to the mainboard power supply circuit and marks the power supply indicator lamp of the circuit as LED1, the other power supply detection circuit is connected with a USB power supply circuit and marks the power supply indicator lamp of the circuit as LED2, and the last power supply detection circuit is connected with the mainboard to panel power supply circuit and marks the power supply indicator lamp of the circuit as LED 3;
the first signal detection circuit is used for diagnosing transmission signals of videos between the Scaler and the FRC and marking the signal indicator lamp as an LED 4; the second path of signal detection circuit is used for diagnosing the transmission signal of the OSD between the Scaler and the FRC and marking the signal indicator lamp as an LED 5; the third signal detection circuit is used for transmitting signals between the FRC and the panel by the diagnostic video and the OSD and recording the signal indicator lamp as an LED 6; the fourth signal detection circuit is used for diagnosing the reset IC signal and marking the signal indicator lamp as an LED 7; the fifth signal detection circuit is used for diagnosing the control signal of the scaler and marking the signal indicator lamp as the LED 8.
7. An on-line detection method for television faults based on an LED indicator lamp, which adopts the on-line detection device for television faults based on the LED indicator lamp as claimed in claim 6, and is characterized in that: the method comprises the following steps:
step 1, analyzing circuit signals of various common fault states of a television and extracting a targeted characteristic signal;
step 2, constructing a detection circuit based on the detection characteristic signal, directly arranging the detection circuit on the circuit board, connecting the power supply circuit to be detected into the corresponding power supply detection circuit, and simultaneously connecting the characteristic signal to be detected into the corresponding signal detection circuit to realize online detection;
and 3, judging the television fault type based on the bright state, the dark state and the flashing state of the indicator light of each detection circuit.
8. The LED indicator lamp-based television fault online detection method according to claim 7, characterized in that: in the step 2, the power panel accesses a power supply detection circuit to the mainboard power supply circuit and records the power supply indicator lamp of the power supply detection circuit as an LED 1; the USB power supply circuit is connected into another power supply detection circuit, and the power supply indicator lamp of the circuit is marked as an LED2, the main board is connected into another power supply detection circuit for the panel power supply circuit, and the power supply indicator lamp of the circuit is marked as an LED 3;
the characteristic signal of the video transmitted between the Scaler and the FRC is accessed into a first path of signal detection circuit, and a signal indicator light of the first path is marked as an LED 4; the characteristic signal transmitted by the OSD between the Scaler and the FRC is accessed into a second path of signal detection circuit, and the signal indicator light is marked as an LED 5; the characteristic signals transmitted between the FRC and the panel by the video and the OSD are connected into a third signal detection circuit, and a signal indicator light of the third signal detection circuit is marked as an LED 6; the characteristic signal of the reset IC is connected into a fourth signal detection circuit, and a signal indicator light of the fourth signal detection circuit is marked as an LED 7; and the control signal of the scaler is connected into the fifth signal detection circuit, and the signal indicator lamp is marked as the LED 8.
9. The LED indicator lamp-based television fault online detection method according to claim 8, characterized in that: the specific fault judgment method in step 3 is as follows:
step 3-1, firstly checking whether the LED1 lamp is normally displayed; if so, the power panel is normal and the step 3-2 is executed; otherwise, if the LED1 is not bright or flickers, the power panel is judged to be abnormal and fault detection is ended;
step 3-2, checking whether the LED2 lamp displays normally; if so, the mainboard supplies power normally and executes the step 3-4; otherwise, executing step 3-3;
step 3-3, checking whether the LED3 lamp displays normally; if so, judging that the SCALER is abnormal while the power supply of the main board is abnormal; otherwise, determining that the power supply of the main board is abnormal and finishing fault detection;
3-4, checking whether the LED7 lamp is normally displayed; if yes, judging that the reset IC is normal and executing the step 3-5; otherwise, judging that the reset IC has faults and determining the fault type based on the condition that the LED7 displays the state;
3-5, checking whether the LED8 lamp is normally displayed; if yes, the signal is normal and step 3-6 is executed; otherwise, the software program is updated to judge whether the software program is normal, and if the LED8 is not bright after updating, the Scaler is judged to be abnormal and the fault detection is ended;
3-6, checking whether the LED4 lamp is normally displayed; if yes, the signal is normal and step 3-7 is executed; otherwise, checking whether the transmission line between the Scaler and the FRC is normal, judging that the video module is abnormal when the transmission line is normal, updating the software program and the Scaler, and then finishing fault detection;
3-7, checking whether the LED5 lamp is normally displayed; if yes, executing step 3-8; otherwise, checking whether the transmission line between the Scaler and the FRC is normal, judging that a software program or Scaler problem exists when the transmission line is normal, updating the software program and the Scaler, and finishing fault detection;
3-8, checking whether the LED6 lamp is normally displayed; if so, the television has no fault and finishes the fault detection; otherwise, checking whether the transmission line between the FRC and the panel is normal, and judging that the FRC is abnormal when the transmission line is normal.
10. The LED indicator lamp-based television fault online detection method according to claim 9, characterized in that: in step 3-4, when the LED7 is not on, the reset IC is judged to be abnormal; when the LED7 flickers, other abnormalities are judged, software, FRC, Scaler and panel abnormalities are checked in sequence to determine a fault point, and then fault detection is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911121399.8A CN110677642A (en) | 2019-11-15 | 2019-11-15 | Television fault online detection method and device based on LED indicator lamp |
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| WO2023248849A1 (en) * | 2022-06-20 | 2023-12-28 | 日本精機株式会社 | Display device |
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