CN202494759U - Failure tracing detector for amplifying circuit - Google Patents
Failure tracing detector for amplifying circuit Download PDFInfo
- Publication number
- CN202494759U CN202494759U CN 201220050215 CN201220050215U CN202494759U CN 202494759 U CN202494759 U CN 202494759U CN 201220050215 CN201220050215 CN 201220050215 CN 201220050215 U CN201220050215 U CN 201220050215U CN 202494759 U CN202494759 U CN 202494759U
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- triode
- resistance
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- loudspeaker
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Abstract
The utility model discloses a failure tracing detector for an amplifying circuit. The detector comprises a battery, a switch, a first electrode, a second electrode, a loudspeaker, a light-emitting diode, a potentiometer, a first transistor, a second transistor, a third transistor, a fourth transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, a third capacitor, and an inductor. According to the utility model, signals of a point to be detected are detected through the first electrode, then the received signals are coupled to the base of the first transistor through the first capacitor for amplifying, and the signals are transmitted to the second transistor, the third transistor and the fourth transistor through the inductor to facilitate sound production of the loudspeaker, if the loudspeaker is in a silent condition or in a sound distortion condition, then a failure exists in the circuit. According to the utility model, the position of the failure can be rapidly and accurately determined, and not only time is reduced, but also determination accuracy is improved. The detector of the utility model has characteristics of a small and compact size, light weight and portability, and can be used as a standing device of electronics enthusiasts.
Description
Technical field
The utility model relates to a kind of circuit checker, relates in particular to a kind of amplifying circuit fault tracing detecting device.
Background technology
When electrical equipment such as repairing Source Music, sound-track engraving apparatus, power amplifier, combination audio; The situation that its amplifying circuit breaks down is more; But owing to there is not special-purpose amplifying circuit pick-up unit; So need spend a lot of times to go for the position of guilty culprit, not only wasted a lot of times, but also occurred wrongheaded situation easily.
Summary of the invention
The purpose of the utility model provides a kind of amplifying circuit fault tracing detecting device with regard to being in order to address the above problem.
The utility model is realized above-mentioned purpose through following technical scheme:
The utility model comprises battery, switch, first electrode, second electrode, loudspeaker, light emitting diode, potentiometer, first triode, second triode, the 3rd triode, the 4th triode, first resistance, second resistance, the 3rd resistance, the 4th resistance, first electric capacity, second electric capacity, the 3rd electric capacity and inductance; The positive pole of said battery is connected with an end of said switch; The other end of said switch is connected with first end of first end of first end of first end of said the 4th resistance, said loudspeaker, said the 3rd resistance, said second resistance and first end of said potentiometer simultaneously; Second end of said the 4th resistance is connected with the positive pole of said light emitting diode; Second end of said loudspeaker is connected with the emitter of said the 4th triode; Second end of said the 3rd resistance is connected with the collector of said second triode and the base stage of said the 3rd triode simultaneously; The emitter of said the 3rd triode is connected with the base stage of said the 4th triode; Second end of said second resistance is connected with second end of said the 3rd electric capacity and the base stage of said second triode simultaneously; Second end of said the 3rd electric capacity is connected with the sliding end of said potentiometer; Second end of said potentiometer is connected with first end of said inductance; Second end of said inductance is connected with the collector of first end of said second electric capacity, said first triode and first end of said first resistance simultaneously; Second end of said first resistance is connected with first end of said first electric capacity and the base stage of said first triode simultaneously; Second end of said first electric capacity is connected with said first electrode, and said second electrode is connected with the negative pole of the collector of the emitter of second end of the emitter of said first triode, said second electric capacity, said second triode, said the 3rd triode, the collector of said the 4th triode, said light emitting diode and the negative pole of said battery simultaneously; Said first triode and said second triode are the positive-negative-positive triode; Said the 3rd triode and said the 4th triode are the positive-negative-positive triode.
The beneficial effect of the utility model is:
The utility model through the first electrode detection measured point signal after with the signal received through first be capacitively coupled to first triode base stage amplify; Pass to second triode to the, four triodes by inductance again; Make it promote the loudspeaker sounding; Noiseless or the audio distortions like loudspeaker, then this place's circuit of explanation has fault.The utility model can be judged the guilty culprit position quickly and accurately, has not only practiced thrift a lot of times, and accuracy of judgement.It has small and exquisite, light, portable characteristics, can be used as electrophile's standing instrument.
Description of drawings
Accompanying drawing is the circuit structure schematic diagram of the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further:
Shown in accompanying drawing: the utility model comprises battery E, switch S, first electrode A, second electrode B, loudspeaker Y, light emitting diode VD, potentiometer RP, the first triode VT1, the second triode VT2, the 3rd triode VT3, the 4th triode VT4, first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3 and inductance L; The positive pole of battery E is connected with an end of switch S; The other end of switch S is connected with first end of the 4th resistance R 4, first end of loudspeaker Y, first end of the 3rd resistance R 3, first end of second resistance R 2 and first end of potentiometer RP simultaneously; Second end of the 4th resistance R 4 is connected with the positive pole of light emitting diode VD; Second end of loudspeaker Y is connected with the emitter of the 4th triode VT4; Second end of the 3rd resistance R 3 is connected with the collector of the second triode VT2 and the base stage of the 3rd triode VT3 simultaneously; The emitter of the 3rd triode VT3 is connected with the base stage of the 4th triode VT4; Second end of second resistance R 2 is connected with second end of the 3rd capacitor C 3 and the base stage of the second triode VT2 simultaneously; Second end of the 3rd capacitor C 3 is connected with the sliding end of potentiometer RP; Second end of potentiometer RP is connected with first end of inductance L; Second end of inductance L is connected with first end of second capacitor C 2, the collector of the first triode VT1 and first end of first resistance R 1 simultaneously; Second end of first resistance R 1 is connected with first end of first capacitor C 1 and the base stage of the first triode VT1 simultaneously, and second end of first capacitor C 1 is connected with first electrode A, and second electrode B is connected with the emitter of the first triode VT1, second end of second capacitor C 2, the emitter of the second triode VT2, the collector of the 3rd triode VT3, the collector of the 4th triode VT4, the negative pole of light emitting diode VD and the negative pole of battery E simultaneously; The first triode VT1 and the second triode VT2 are the positive-negative-positive triode; The 3rd triode VT3 and the 4th triode VT4 are the positive-negative-positive triode.
Shown in accompanying drawing: with first electrode A contact measured point, the electric signal of receiving warp first capacitor C 1 is coupled to the base stage of the first triode VT1, carries out preposition amplification by the first triode VT1; Signal after the amplification is passed to the direct coupled type two-stage amplifying circuit that the second triode VT2, the 3rd triode VT3 and the 4th triode VT4 form through inductance L, and the emitter-base bandgap grading output by complex pipe the 3rd triode VT3 and the 4th triode VT4 promotes loudspeaker Y and sends the sound.When first electrode A contact measured point and loudspeaker Y is noiseless or during audio distortions, explain that this place's circuit has fault.
Shown in accompanying drawing: when debugging the utility model, at first potentiometer RP is spun on moderate position, selects for use a radio as signal generator, frequency is at 800Hz～1kHz, and level is in-14～0dB scope.First electrode A touches the output terminal of signal generator, and second electrode B is linked to each other with the signal generator ground wire.Like the no signal generator, can be with the collector of first electrode A touching radio power amplifier prime triode.Second electrode B receive the dynamo-electric source negative pole of sound or " ".During the debugging radio, loudspeaker Y can hear broadcasting sound.The adjustment of the first triode VT1 quiescent point: explain that the first triode VT1 is in state of saturation, regulates first resistance R 1 when faint signal is arranged when hearing; Signal increases gradually, and then the first triode VT1 collector potential Vc1 raises gradually; Comparatively clear up to sound, this moment IC1, for about 0.6mA; The first triode VT1 is in magnifying state, can stop adjustment.As can't hear signal, and explain that then the first triode VT1 is in cut-off state, regulate first resistance R 1, Vc1 is lowered by noble potential gradually, make the first triode VT1 get into magnifying state.Signal sound reaches optimum efficiency and gets final product.The adjustment of the second triode VT2 quiescent point is identical with the first triode VT1.Regulate second resistance R 2, signal will be increased by clear continuation, must guard against can not signal be transferred to ear-piercing.After adjustment was accomplished, regulator potentiometer RP can feel obviously that then signal is changeable.Record the second triode VT2 collector current Ic2 this moment is that 5～10mA gets final product.Need to prove; When adjusting first resistance R 1 and second resistance R 2; Preferably go here and there earlier the resistance of people 1k Ω, 10k Ω respectively; In order to avoid when accidentally resistance being transferred to 0 Ω, thereby supply voltage will all be added between base stage and the emitter of the first triode VT1 and the second triode VT2 triode is burnt out.After having transferred, measure actual resistance with multimeter, first resistance R 1 and second resistance R, 2 resistance are fixed up again, the utility model can use at work.
Claims (2)
1. amplifying circuit fault tracing detecting device; It is characterized in that: comprise battery, switch, first electrode, second electrode, loudspeaker, light emitting diode, potentiometer, first triode, second triode, the 3rd triode, the 4th triode, first resistance, second resistance, the 3rd resistance, the 4th resistance, first electric capacity, second electric capacity, the 3rd electric capacity and inductance; The positive pole of said battery is connected with an end of said switch; The other end of said switch is connected with first end of first end of first end of first end of said the 4th resistance, said loudspeaker, said the 3rd resistance, said second resistance and first end of said potentiometer simultaneously; Second end of said the 4th resistance is connected with the positive pole of said light emitting diode; Second end of said loudspeaker is connected with the emitter of said the 4th triode; Second end of said the 3rd resistance is connected with the collector of said second triode and the base stage of said the 3rd triode simultaneously; The emitter of said the 3rd triode is connected with the base stage of said the 4th triode; Second end of said second resistance is connected with second end of said the 3rd electric capacity and the base stage of said second triode simultaneously; Second end of said the 3rd electric capacity is connected with the sliding end of said potentiometer; Second end of said potentiometer is connected with first end of said inductance; Second end of said inductance is connected with the collector of first end of said second electric capacity, said first triode and first end of said first resistance simultaneously; Second end of said first resistance is connected with first end of said first electric capacity and the base stage of said first triode simultaneously, and second end of said first electric capacity is connected with said first electrode, and said second electrode is connected with the negative pole of the collector of the emitter of second end of the emitter of said first triode, said second electric capacity, said second triode, said the 3rd triode, the collector of said the 4th triode, said light emitting diode and the negative pole of said battery simultaneously.
2. amplifying circuit fault tracing detecting device according to claim 1 is characterized in that: said first triode and said second triode are the positive-negative-positive triode; Said the 3rd triode and said the 4th triode are the positive-negative-positive triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220050215 CN202494759U (en) | 2012-02-16 | 2012-02-16 | Failure tracing detector for amplifying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220050215 CN202494759U (en) | 2012-02-16 | 2012-02-16 | Failure tracing detector for amplifying circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202494759U true CN202494759U (en) | 2012-10-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220050215 Expired - Fee Related CN202494759U (en) | 2012-02-16 | 2012-02-16 | Failure tracing detector for amplifying circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202494759U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104077900A (en) * | 2013-03-29 | 2014-10-01 | 北京谊安医疗系统股份有限公司 | Medical instrument alarm apparatus starting detection device and starting detection method |
-
2012
- 2012-02-16 CN CN 201220050215 patent/CN202494759U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104077900A (en) * | 2013-03-29 | 2014-10-01 | 北京谊安医疗系统股份有限公司 | Medical instrument alarm apparatus starting detection device and starting detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121017 Termination date: 20130216 |