A kind of motherboard audio loop test device and test method

Abstract

The invention discloses a mainboard audio loop test device, which is characterized in that it includes an integrated test system, a sound-absorbing box, a loudspeaker, a voice-activated switch, a photosensitive resistor and a buzzer, and the voice-activated switch includes an electrically connected wheat head and an LED display lamp, and a photosensitive The resistor and the buzzer are respectively electrically connected to the integrated test system. The integrated test system is used to supply power to the buzzer and to receive the feedback signal of the photoresistor. The speaker and the microphone head are set in the muffler box, and the photoresistor corresponds to the LED display light. set up. Directly simulate the work of the audio circuit, and connect the audio device to the signal output end of the audio circuit of the motherboard. When the audio circuit is working, it can intuitively detect whether the audio device is sounding to determine whether the audio circuit is normal or not. It has the reliability of the traditional human ear test. , At the same time, it can realize high-efficiency automated 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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