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This lesson is about the maintenance of no sound from the earpiece, mainly from four aspects

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First, the code name, function and position of the handset in the entire mobile phone

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Second, the circuit structure related to the handset

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Third, the search for the handset line in the drawing

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Fourth, how to repair the handset when there is no sound

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First look at the code name of the handset and its function

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This is what the handset looks like in real life

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There are currently two categories

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A large category is an ordinary earpiece, which has two contacts

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There is also a sound under the screen, such as Huawei P40, of course it also has two contacts

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This is the reverse side of the earpiece, it's a coil

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This is the back of the handset, the above is the real thing

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Its code name in the drawings is commonly RCV, EAR, REC

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RECEIVER is its full name

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We can enter these three codes to find the signal or circuit of the handset

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In many mobile phones now, SPK is used to refer to

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Most of the SPK refers to the models whose earpiece supports playing music

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The role of the handset

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What is the main responsibility of the earpiece in the circuit

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It is responsible for restoring the sound,

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which is mainly used to make a sound when the hands-free is not turned on to make a call,

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and it is also used to make a sound when the hands-free is not turn

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When the speaker on the top makes a sound, it is usually the earpiece that makes the sound

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Its principle is to convert electrical signals into sound

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Handset Caused Malfunction

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The most obvious failure is that the phone cannot hear the sound

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The inaudible sound means that when the handsfree is not turned on,

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the other party鈥檚 voice cannot be heard when making a call

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In this case, we have to consider that the handset circuit of the mobile phone or the handset itself has failed

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That's all for this lesson