Mainboard voice frequency circuit testing device and method

Abstract

The invention discloses a mainboard voice frequency circuit testing device. The mainboard voice frequency circuit testing device is characterized by comprising an integrated testing system, a noise reduction box, a loudspeaker, a voice-operated switch, a photoresistor and a buzzer, wherein the voice-operated switch comprises a microphone and an LED display lamp which are electrically connected with each other; the photoresistor and the buzzer are electrically connected with the integrated testing system; the integrated testing system is used for supplying power to the buzzer and receiving feedback signals of the photoresistor; the loudspeaker and the microphone are arranged in the noise reduction box; the photoresistor and the LED display lamp are correspondingly arranged. The mainboard voice frequency circuit testing device can directly simulate work of a voice frequency circuit; the signal output end of the mainboard voice frequency circuit is connected with a voice frequency device; when the voice frequency circuit works, whether the voice frequency circuit is normal or not can be judged by visually detecting whether the voice frequency device produces a sound or not, so the mainboard voice frequency circuit testing device has the reliability of traditional human ear testing and judgment and can also achieve high-efficiency automatic testing.

Description

technical field [0001] The invention belongs to the technical field of mainboard audio circuit testing, and in particular relates to a mainboard audio circuit testing device and a testing method. Background technique [0002] The motherboards of mobile phones, tablet computers and other electronic products need to undergo various tests after production to ensure that they can be used normally, including testing the audio circuit of the motherboard. The traditional testing method uses human ear testing, which is highly reliable but efficient. Low, not in line with the value of the current production pursuit of unit cost, so the current motherboard audio loop test technology mainly uses the method of testing the frequency and amplitude of the analog signal on the motherboard audio loop. In this method, on the premise of driving the audio circuit to work, a signal of known frequency and amplitude is given at the beginning of the audio circuit. After the audio circuit is process...

AI Technical Summary

Problems solved by technology

Specifically, as figure 1 As shown, the current audio loop test technology only conducts separate separate tests for branch 1 and branch 2, and the devices circled in the figure will not be covered, resulting in the failure of branch auxiliary and matching devices. Audio devices ( SPK) does not work properly and cannot be detected

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