Acer HARLEY TAB A3-A20, Service Manual

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6.4 Audio----Audio Frequency Input & Output Test

The 1
st
test----Speaker Test: to check the normality of the speaker. After entering in to the test, click on
―Pass‖ if the speaker sounds normally.

The 2
nd
test----MIC Test: After clicking on the
―Pass‖ button and enter into this test, which is to check the
normality of MIC. After entering into the test, you closely say some words to the MIC. The test will pass if
the pointer deflects and shows
―MIC volume Test Pass‖.

Picture A is the first interface of MIC test: Tester blows to the main MIC.

Picture B will appear: MIC volume Test Pass, when the sound is big enough. Continuously
pronounce to the main MIC and the system will record it.

Picture C will appear when the headset is inserted. Listen whether the headset makes the same
sound without noise, so as to prove the normality of MIC. Click on
―Pass‖ if normal. Otherwise, click
on
―Fail‖.