This is definitely a destructive teardown. Hopefully it will help to show how the adapter was put together. Also that it does have a DAC on the adapter, not the lightning connector on the idevice.

This teardown is not a repair guide. To repair your Apple Lightning to Headphone Jack Adapter, use our service manual.

  1. Typical Apple product packaging. Simple yet elegant
    • Typical Apple product packaging. Simple yet elegant

    • Backside of the package

    • Bottom of the package describes the adapter as a A1749

  2. Again, nice packaging for the adapter.
    • Again, nice packaging for the adapter.

    • The total length of the adapter is 3 1/8 inches or 8cm. One side with the lightning connector and the other end is the 3.5mm headphone jack.

    • Checked to see if there was any way to remove the outside of the adapter by slipping some thin tools in between. No way on that.

    • This is the business end that requires the removal of the covering.

    • The only way to do that is by cutting into it. Using a good scalpel does cut it with relative ease.

    • Careful while using a sharp instrument, not much room to hold onto the connector.

    • Cutting length wise on one side

    • as well as the opposite site

    • Then flipping the two halves that were created by the cuts.

    • This makes for an easy removal.

    • The next thing to be removed is the ground shield.

    • Using a pair of small side cutters that shield is easily removed as well.

    • Just a matter of using the cutters on one end

    • and rolling it around the connector.

    • This shows the destructive nature of this teardown

    • The connector is now left with another plastic covering.

    • Luckily the removal of the ground shield seems to have open slots lengthwise in the plastic covering.

    • Using these slots, the plastic needs to be carefully pulled away from the circuit board.

    • Here is the business end with the cover removed.

    • This side shows what appears to be the DAC inside this adapter

    • Close-up of the circuit board shows Apple's fascination with adhesive and other sticky substances. Both sides of the circuit board are covered with it.

    • A bit more of a close up of one side

    • as well as the other. As more information becomes available about the DAC this teardown will be edited to reflect those.

    • Here are the markings on the DAC 338S00140 A0SM1624 TW

    • Carefully slice down the headphone jack connector with a sharp knife, being careful to not cut yourself.

    • Insert wisdom here.

  3. Final Thoughts
    • The device is clearly not meant to be opened or repaired in any way.
    • It is impossible to open the adapter without destroying it.
    Repairability Score
    Repairability 0 out of 10
    (10 is easiest to repair)


Member since: 09/29/2010

554,813 Reputation

101 Guides authored


OTS Member of OTS


1 Member

122 Guides authored


There seem to be a lot more wires than necessary going to the 3.5mm connector. By my count there appear to be 7 or 8 discrete wires?

At most there should be 4, TRRS, and maybe a shield ground. How are the other wires used here?

Mac 128 - Reply

Mac 128 excellent question and I will try and take the jack end off as well asap. There is a total of 7 wires....

oldturkey03 -

Perhaps it supports both standard pinout methods for mics/remotes, rather than just Apples flipped data/ground pin standard?

tipoo -

I am currently looking into modyfying an Apple TRRS connector so I can take some readings on what is what and how it may function. Only hold-up is that I do work for a living:-) so time is always an issue.

oldturkey03 -

Mac 128 mystery already solved. Check this teardown by Mason Dowell Apple Earphones with Remote and Mic (Lightning Edition) Teardown. It'll explain what each wire does.

oldturkey03 -

View Statistics:

Past 24 Hours: 32

Past 7 Days: 261

Past 30 Days: 1,142

All Time: 56,172