Where should I solder the wireless coil wires?

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Apple Watch - Original

Announced September 9th, 2014, this device is Apple's first foray into smart wearables. iFixit's repair manuals are applicable to Apple Watch (steel) and Apple Watch Sport (aluminum).

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Hu Wei Ng @hwng89

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发帖于: 2018年9月25日

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Where should I solder the wireless coil wires?

My Apple Watch wireless charging coil connection is detach from the S1 board and I do know the connection. Can someone advise me where should I solder the wire? I can’t identify the positive and negative of the pad.

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Minho @refectio

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I’m not an expert with the Apple Watch but if the charging coil is “just a coil”, then it won’t matter which orientation as it will create an inductive field either way.

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While I agree a coil is not polarized I do wonder why one of the wires is colored Red. The few units I did fix had the full bottom unit come off. It appears only the coil came off in yours. You may want to just get the assembly and replace the full part. While more work its more likely to work.

由 Dan 完成的 2018年9月25日

@danj If there is any other circuitry inside, then yes polarity will be important. I'm just going on what I can see. Looking at the third picture of Step 20 of this Teardown guide, both wires look black.

由 Minho 完成的 2018年9月25日

You'll need the smallest tip you can find, like 0.2mm (smaller is better). Any standard paste flux will work fine.

由 Minho 完成的 2018年9月25日

Thanks @refectio . To clarify again, should I buy solder paste or solder flux? How to clear the surface before soldering?

由 Hu Wei Ng 完成的 2018年9月25日

@danj is there any wires falling off on the units that you fixed before?

由 Hu Wei Ng 完成的 2018年9月25日

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While I agree a coil is not polarized I do wonder why one of the wires is colored Red. The few units I did fix had the full bottom unit come off. It appears only the coil came off in yours. You may want to just get the assembly and replace the full part. While more work its more likely to work. — Dan
@danj If there is any other circuitry inside, then yes polarity will be important. I'm just going on what I can see. Looking at the third picture of Step 20 of this Teardown guide, both wires look black. — Minho
You'll need the smallest tip you can find, like 0.2mm (smaller is better). Any standard paste flux will work fine. — Minho
Thanks @refectio . To clarify again, should I buy solder paste or solder flux? How to clear the surface before soldering? — Hu Wei Ng
@danj is there any wires falling off on the units that you fixed before? — Hu Wei Ng

Apple Watch - Original

Where should I solder the wireless coil wires?

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