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Lunii - Loss of sound on internal speaker

简介

Repair tutorial for when internal speaker does not work, but headphones do.

你所需要的

  1. Lunii - Loss of sound on internal speaker, Unscrew the screws: 步骤 1 中的图像 1，1

    • Remove the 4 Torx 6 screws located at the back of the device.

    • Since the screws are housed at the bottom of a hole, you will need a particularly long bit or even better, a screwdriver.

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  2. Lunii - Loss of sound on internal speaker, Open the box: 步骤 2 中的图像 1，3 Lunii - Loss of sound on internal speaker, Open the box: 步骤 2 中的图像 2，3 Lunii - Loss of sound on internal speaker, Open the box: 步骤 2 中的图像 3，3

    • Separate the two parts of the box, taking care to open the box well from the top, so that you end up with the contents of the box still in place in each of the halves.

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  3. Lunii - Loss of sound on internal speaker, Remove the battery from its housing.: 步骤 3 中的图像 1，2 Lunii - Loss of sound on internal speaker, Remove the battery from its housing.: 步骤 3 中的图像 2，2

    • Remove the battery from its housing.

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  4. Lunii - Loss of sound on internal speaker, Disconnect the battery: 步骤 4 中的图像 1，2 Lunii - Loss of sound on internal speaker, Disconnect the battery: 步骤 4 中的图像 2，2

    • The connector needs to be removed very gently.

    • Depending on the connector, some force may be required.

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  6. Lunii - Loss of sound on internal speaker, Volume dial removal: 步骤 5 中的图像 1，2 Lunii - Loss of sound on internal speaker, Volume dial removal: 步骤 5 中的图像 2，2

    • Remove the volume dial by pulling it out.

    • The knob has a latch, which must be returned to its original position when reassembling.

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  7. Lunii - Loss of sound on internal speaker, Selection Knob Removal: 步骤 6 中的图像 1，3 Lunii - Loss of sound on internal speaker, Selection Knob Removal: 步骤 6 中的图像 2，3 Lunii - Loss of sound on internal speaker, Selection Knob Removal: 步骤 6 中的图像 3，3

    • Remove the selection knob by pulling it upwards.

    • For reassembly, there's a small pin on one side of the knob axis which must match that of the component on the PCB.

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  8. Lunii - Loss of sound on internal speaker, Circuit board removal: 步骤 7 中的图像 1，2 Lunii - Loss of sound on internal speaker, Circuit board removal: 步骤 7 中的图像 2，2

    • The circuit board is easy to remove from the case, as there are no screws to hold it in place.

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  9. Lunii - Loss of sound on internal speaker, Checking traces with a multimeter: 步骤 8 中的图像 1，1

    • After repairing the cut trace between the jack and the pad to the left of the D6 marking, check the signal of the R38 pad, near the processor.

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  10. Lunii - Loss of sound on internal speaker, Visually inspecting the traces: 步骤 9 中的图像 1，2 Lunii - Loss of sound on internal speaker, Visually inspecting the traces: 步骤 9 中的图像 2，2

    • Damage to the trace can be very hard to see, as shown here.

    • This connection seems to work at first glance. But on closer inspection, the trace is cut off right at the pad.

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  11. Lunii - Loss of sound on internal speaker, Fixing the trace: 步骤 10 中的图像 1，2 Lunii - Loss of sound on internal speaker, Fixing the trace: 步骤 10 中的图像 2，2

    • Ideally, a piece of wire should be used to reconnect the connector to the soldering pad at the other end of the trace.

    • Here are two examples of repairs that are equivalent in function. The first is carried out by a professional using his own equipment.

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结论

To reassemble your unit, follow the instructions in reverse order.

5等其他人完成本指南。

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Mario67

于04/23/22注册

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34条评论

Merci à ce tutoriel, j'avais exactement le même problème, mais après avoir soudé ce truc 5 fois et que ça recassais, j'ai poncé un peu la board, refais la soudure et fixé cette maudite pièce au pistolet à colle, tout autour de la prise jack. Plus de soucis. Le design est vraiment mal fait car cette pièce n'est pas bien tenue en place et les enfants font pas toujours gaffe en branchant. Bref. Merci 1000 fois pour ce tuto, je n'aurais jamais trouvé sinon.

Youn Le Goff - 回复

J'aurais jamais trouvé... Merci bcp, marche impec, j'en ai profité pour re souder la molette également !! Ma fille va être ravie

Laurent du Passage - 回复

Bonjour.

Merci pour ce tuto. Malheureusement, mon cas est plus grave. C'est une des lamelles du connecteurs qui est cassée. Avez vous la référence du connecteur pour le changer ? Merci

Sébastien Gourand - 回复

J ai le meme pb,impossible de trouver la reference du connecteur qui a cassé.

Angélique Paulin -

Bjr,

une des lamelles du connecteur ❓

De la prise Jack, pour connecter un casque ou des écouteurs, vous voulez dire ❓

Mario67 - 回复

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