Acer liquid M330, Service Manual

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2.2.19 Main MIC
This test is used to test main MIC function, please insert the headset, and then go into the
microphone test interface (show as below figure 1), if mobile detected the headset, will change
testing interface, show as below figure 2, then click on the "loopback mode" button, speak to
main MIC, you can hear the sound of the corresponding from headphones, If the above tests
are normal, the tests pass, click on the "pass" button, if not is meaning test fail, click on the "fail"
button exit and go to the next test.
(note: 1, from the beginning of this test until the end, it is necessarily to insert the earphone
test; 2, in the process of clicking the loopback test, don't click on the headset button, separate
headset button test and a loopback test )