Now more and more mobile phones have gradually cancelled the 3.5mm audio interface, and manufacturers have instead launched their own TWS true wireless headphones or Type-Ch interface headphones. Fewer ones come with the Type-C to 3.5mm adapter, which is not very friendly to consumers who do not accept real wireless headphones and pursue the sound quality of wired headphones.
Currently, in addition to the ordinary Type-C to 3.5mm adapter, there is also an audio conversion cable with built-in DAC professional decoding chip, such as the Meizu HIFI decoding headphone amplifier and Meizu HIFI decoding headphone PRO that I Love Audio Network disassembled, as well as Microsoft USB-C audio conversion cable, Google Pixel 2 USB-C audio converter, Moshi USB-C audio adapter, Apple USB-C to Headphone Jack Adapter, etc. These cables not only have built-in DAC professional decoding chips, but also have one thing in common, which is that the price is relatively high.
This time, the Type-C to 3.5mm audio conversion cable that I Love Audio Network disassembled this time has launched the Jieli AC1279A decoding chip. It has excellent workmanship and is not much different from the adapter cable without chips. Let’s take a look at the detailed disassembly below!
1. Jieli USB-C to 3.5mm audio conversion cable Appearance
Packaging is relatively simple, transparent orange packaging bag with "Audio line" audio transmission line printed on it, you can see the conversion cable inside.
conversion line appearance close-up, the interface at both ends is red, the wire is black, and the black and red color combination is more classic; the wire is slightly longer than the business card, which is very portable. One end of the
Type-C interface is connected to mobile phones or other digital devices; the shell is made of aluminum alloy and is evenly painted.
There is a layer of braided mesh outside the wire, which is more durable and reliable. It is rare to use braided thread at this price point. Close-up of one end of
3.5mm audio interface.
2. Jieli USB-C to 3.5mm audio conversion cable Disassemble
First, disassemble one end of the 3.5mm audio interface, which can be divided into three parts.
3.5mm audio interface close-up. The solder joints of the wires connected to the
3.5mm audio interface are relatively full.
There are four wires of different colors in the wire.
Next, disassemble the Type-C interface side, and the aluminum alloy shell is fixed by glue.
Type-C plug part front close-up of motherboard , with decoding chip.
Type-C plug part back close-up.
pin welding close-up.
JL JL AC1279A decoding chip with built-in 8051 MCU microprocessor.
Jieli AC1279A decoding chip has built-in decoding chip, which can directly push headphones; 16bit high-precision DAC with MIC amplification circuit . Supports USB audio call channel, supports music and call functions of Android and Apple headsets.
Jieli AC1279A data map.
disassembles the family portrait.
I love audio network summary
Jieli USB-C to 3.5mm audio conversion cable, USB-C interface is an integrated tensile process, with high strength; the connector is made of aluminum alloy material and has an anode sandblasting treatment, which has a delicate feel; the wire is nylon braided tensile resistance process, which is resistant to multiple bendings, and improves the service life of the wire. From the perspective of disassembly, the materials and workmanship are very neat.
, and this audio conversion cable can be used as an external independent sound card . On Win7/8/10, Mac OS X iOS 10, Android 4.0 and above operating systems, no additional drivers are required to plug and play. Supports multiple USB-C device protocols, and the product is compatible with well-known domestic and foreign brands such as Xiaomi , Meizu, Sharp, SONY, Huawei and other domestic and foreign brands (need to support USB-C audio output by the mobile phone itself).
Jieli USB-C to 3.5mm audio conversion cable is equipped withJieli AC1279A decoding chip. This is the first appearance of this chip and also marksJieli's beginning to layout the decoding chip market. In the future, we may see it in more cost-effective audio decoding products.
