Recently, we shared the review of ACEFAST T6 true wireless earphones. In terms of appearance, the charging case adopts a pure and transparent shell design with open storage. With colorful colors, it looks fashionable and unique, and has a high degree of recognition.
In terms of functions, it is equipped with a 6mm dynamic driver and has a built-in BES audio solution. Support Bluetooth 5.0 and AAC audio decoding, high-definition restore sound. Support dual-mic ENC call noise cancellation to provide clear call effect. It supports LED digital power display, with a single battery life of 4 hours and a combined battery life of 20 hours with a charging case. Let’s take a look at the detailed teardown report of this product.
ACEFAST T6 review ($39)
01/ ACEFAST T6 charging case teardown
Remove the transparent cover of the charging case.
The charging case side structure. The digital display structure is fixed on the front, and the motherboard unit can be seen below.
The cover plate is fixed with screws on the back of the charging compartment.
Remove the screws to remove the cover.
Remove the battery and motherboard unit.
There is a cable on the main board to connect to the digital display board.
The inner structure of the charging compartment is equipped with magnets to attract earphones. The magnets are flanked by metal connectors for charging earphones.
The circuit on one side of the charging case motherboard.
The circuit on the other side of the charging case motherboard.
SinhMicro SS881A POWER MCU is an AD type Flash MCU with integrated charge and discharge management. Power management unit and charging management unit are integrated to provide full software real-time configurable charging voltage and current settings.
The SS881X series is one of the products of the SinhMicro POWER MCU series, with rich interface functions and flexible configuration modes. Different low power consumption options are supported, suitable for portable electronic products that require battery charging and intelligent control, and the charging voltage and current of the battery can be flexibly configured through software. At the same time, it also has built-in perfect protection functions, and the chip itself has passed the IEC62368 certification. Using SinhMicro microcontrollers brings a streamlined appearance, excellent performance and flexible and convenient development to TWS earbuds.
According to 52audio, many models including Xiaomi, OPPO, 1MORE, Edifier, Redmi, ZMI, realme, FIIL, Anker, Lenovo, Nubia, Razer, HTC, Soundcore, JBL, Honor and other brands TWS earphone charging cases have adopted SinhMicro’s solutions in large numbers.
Microne screen-printed “W8TJ” chip.
Silkscreen 470 power inductor.
ZIF connector for connecting the cable of the digital display small board.
Resettable fuse.
Type-C charging socket, through-hole welding and fixing.
Digital display assembly, including a light guide plate and a small board for setting the indicator lights.
The circuit on the back of the small board, the cable is soldered.
Remove the light guide plate used to separate the light source.
Charging case built-in lithium battery Model: XD 902930, voltage: 3.7V, capacity: 500mAh/1.85Wh, production date: June 9, 2022.
The circuit on one side of the battery protection board is provided with DW01 lithium battery protection IC and 8205A MOS tube, as well as a thermistor for detecting battery temperature.
The circuit on the other side of the battery protection board.
02/ ACEFAST T6 earphones teardown
Go to the earphone teardown section. First pry off the header stem back cover.
A bluetooth antenna and a touch detection patch are attached to the inner side of the cover, and the exposed copper is connected to the motherboard.
The internal structure of the cavity, the microphones at both ends of the main board are provided with acoustic rubber structure seals.
There is a sponge pad isolation protection between the motherboard and the battery in the earphone head.
Take out the motherboard and battery unit, the internal structure of the cavity.
The speakers inside the front cavity are fixed in the sound outlet pipe and connected to the main board through wires.
Take out all components inside earphone.
Two magnets are arranged on the cavity wall for adsorbing the charging case.
The circuit on one side of the earphone mainboard is affixed with a magnetic shielding sticker corresponding to the position of the magnet.
circuit on the other side of the motherboard.
The LED indicator on the motherboard is used to feedback earphone bluetooth pairing status.
The MEMS microphone of the laser engraving QR code is used to pick up the sound of the noise cancellation function of the call.
The MEMS microphone with the laser engraving QR code at the end of the motherboard is used for the voice call function to pick up the human voice.
Metal dome used to connect the touch detection patch.
The touch detection IC of the silkscreen 7133B is matched with the touch detection patch to realize the control of various functions.
Pogo Pin connector for connecting the bluetooth antenna.
Silkscreen 066 A IC.
Silkscreen HaA’s IC.
Metal copper post connector for charging earphones. The round table design is adopted, which can better seal.
BES BES2300IU bluetooth Audio SoC. There are multiple versions of BES2300 series with different suffixes and different configurations. BES2300 series supports Bluetooth 5.0, IBRT bluetooth monitoring technology, and also supports the third-generation FWS full wireless stereo technology, dual microphones, etc. Using 28nm HKMG CMOS process, BGA package.
As far as we know, the true wireless earphones of Xiaomi, Samsung, Huawei, OPPO, Honor, DENON, realme, Edifier, JBL, 1MORE, Baidu, OnePlus and many other brands have adopted the BES bluetooth audio solution.
The crystal oscillator that provides the clock for the bluetooth chip.
A soft-pack battery is used inside the earphone, which is wrapped with high-temperature tape for insulation.
Lithium battery model: HM 501012, capacity: 40mAh/0.15Wh, voltage: 3.7V.
The front of the earphone speaker.
The back of the earphone speaker.
After actual measurement, the speaker size is about 6mm.
All components of ACEFAST T6 true wireless earphones.
03/ Summary
The ACEFAST T6 is one of its main highlights in terms of appearance. The innovative design has injected fresh blood into the current TWS earbuds market. The pure and transparent shell design of the charging case, combined with the unique open cockpit structure and digital display, presents a very distinctive visual perception. Ergonomically designed handle-shaped in-ear earphones, with a weight of 3.8g, are light and comfortable to wear.
In terms of internal structure configuration, the internal components of the charging case perfectly fit the unique cabin structure. It mainly includes the main board, battery and digital display board. The charging case has a built-in 500mAh lithium battery and is equipped with a battery protection board responsible for overcharge, overdischarge, overcurrent and other protection functions. Type-C interface input power is used on the motherboard, and SinhMicro SS881A POWER MCU is responsible for charging the built-in battery and driving LED lights.
The earphone uses a 6mm dynamic driver unit and a 40mAh soft-pack lithium battery, which are connected to the motherboard through wires. The motherboard is equipped with two MEMS microphones for pickup of voice calls. The main control chip is BES BES2300IU bluetooth audio SoC, which supports Bluetooth 5.0 and IBRT bluetooth monitoring technology. It also supports the third-generation FWS full wireless stereo technology and dual microphones, etc., providing support for many functions of earphones.
Source: 52audio
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4 Comments
Hi, can I ask what did you do to remove the transparent case? I’m having a hard time removing mine (acciddentally spilled coffee in it) Thank you 🙂
Hi, Patricia! I pried it off from the side, which will damage the case, and it may not be possible to restore it after prying.
Hello! My Acefast T6 charging case stopped charging. I troubleshooted it and discovered the B+ and SS881A pin 4 were shorting to the ground. I injected 1 volt to B+ and Ground and the W8TJ IC got hot. I removed W8TJ from the board and the short was gone. I can measure 2.8V but it won’t charge the earbuds. If I directly put 5V to the earbuds it starts to charge. I suspect W8TJ is a step-up IC to step-up the 2.8V to 5V. I googled for the datasheet but can’t find it. Is the W8TJ chip a step-up voltage converter? Do you know a replacement IC? Thanks
Sorry, I haven’t found any relevant information either.