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In this lesson we're going to learn about the main audio

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In Apple's models, most audio chips are made by a single manufacturer

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The main audio is mainly responsible for

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converting digital audio signals into analog audio signals,

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or converting analog audio signals into digital audio signals

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In mobile phones, it is mainly used to process sound circuits

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For example, the voice we speak when we make a phone call is an analog signal,

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and the music we play is a digital signal

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Circuit signal conversion is mainly controlled by the main audio

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In the mainboard, audio surface for glass crystal, relatively bright,

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most of the rectangle

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Its surface usually begins with 338s

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Damage to the master audio will result in no sound,

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no message, no receiver, no ringtone

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Problems like these can be caused by large audio damage

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After large audio damage,

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the replacement needs to be replaced with the same model

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Then let's go to the physical mainboard to find a few main audio to know

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Audio chip is also called master audio

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This is the iPhone 7 mainboard

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Its audio chip is located in the middle of the mainboard,

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the surface is very bright, the shape is generally rectangular

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This mainboard is a XR model,

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and its audio chip is located in the upper right corner of the power supply

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This chip also looks big, with a logo beginning with 338s

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This is the main audio

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This mainboard is 11 mainboard, double-layer mainboard

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The audio chip is generally located in the upper board

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The mainboard's audio chip is located next to the power supply

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The surface of this chip is bright,

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the font is not very clear,

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it is the audio chip main audio

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So that's all for this lesson