Min sincern pro is a TWS true wireless headset product, which follows Apple's design style in appearance. The charging box is rectangular, the earphone is handle-shaped in-ear design, and the overall color is pure white. The configuration adopts Bluetooth 5.0 chip, which supports automatic connection and touch operation.
Before I love audio network, I dismantled ISO K66 true wireless Bluetooth headset and K6H true wireless Bluetooth headset. Let's take a look at the internal structure of this product ~
The packaging box is still the unique design of famous products, and the transparent box cover can directly see the appearance of the internal products. The printed data comes with its own charging base, giving consideration to calls and music, touch sensing, Bluetooth 5.0, 2.5h battery life, 1.5h full.
On the back of the box are some product parameter information, usage and precautions. The brand is mingyoupin industrial co., ltd, and the agent is mingyoupin (Guangzhou) co., ltd.
The items in the box include headphones, charging cables and product manuals.
Two earplugs of different sizes.
USB-A to Micro USB charging cable.
The front appearance of the charging box is clear at a glance, with rounded corners and square design. There is an indicator light on the front, and a groove is designed at the lid opening to facilitate the opening of the lid.
The information on the back of the charging box has MINISO brand LOGO, product model: K66 Pro, input: 5V-350mAh, made in China.
The Micro USB charging interface is located at the bottom of the charging box.
Open the charging box cover, place the built-in earphone vertically, and highlight the charging compartment for easy taking out and wearing.
The metal shrapnel at the bottom of the charging cockpit is used to charge headphones.
I love audio networks. ChargerLAB POWER-Z KT002 Portable Power Tester is used to test the wired charging of the famous K66Pro true wireless Bluetooth headset. The input power is about 1. 15W.
Overview of the overall appearance of the famous K66Pro true wireless Bluetooth headset.
The overall weight of the famous K66Pro true wireless Bluetooth headset is about 42.8g.
The weight of the charging box is about 35.9g.
The earphone weighs about 7.2g, which is relatively very light.
Take out the charging cockpit fixed by snap.
Side view of the charging cockpit, the battery unit is arranged in the belly of the cockpit, and the main board is fixed at the bottom.
The main board unit is fixed with screws, and two sides are small boards for charging headphones.
The charging small board is connected with the main board through the metal elastic sheet.
Remove the main circuit of the charging box and turn off the heavy iron block in the cockpit.
Close-up of a small board for charging headphones.
List of main circuits in the charging box.
Lithium-ion flexible battery model: 70 1230, capacity: 220mAh, rated voltage: 3.7V.
The battery is equipped with a circuit protection board for overcharge, overdischarge and overcurrent protection.
The front circuit of the motherboard is very simple, with only one power management IC.
Overview of the circuit on the back of the motherboard. A sponge pad for isolation from a battery is provided.
There are two LED indicators with different colors inside the sponge pad.
Metal shrapnel connected with the charging small board.
Hotchip Huaxinbang PB 1 155A Power Management SoC integrates many functions, such as boost converter, lithium battery charging management, battery charge indication and so on. , and supports output over-current, over-voltage and short-circuit protection, input over-voltage, over-charge, over-discharge and over-current protection, and over-temperature protection. Used to charge and discharge the battery in the charging box, charge the earphone and feed back the remaining power.
Hotchip huaxinbang PB 1 155A detailed data map.
In the earphone part, the earphone is a handle-shaped in-ear design.
At the bottom of the earphone handle is a microphone receiving hole and a metal charging contact at the periphery.
There is a pressure relief hole on the back of the earphone, which is covered with a dustproof net.
A dustproof net is built into the pressure relief hole on the front of the earphone.
The earphone has a close-up sound hole, which is protected by a fine dustproof net to prevent foreign objects from entering the sound cavity.
Remove the earphone cavity along the clamping line.
Overview of internal components of earphone head.
Close-up of earphone speaker, fixed with blue glue. Back welding wire, full solder joint.
Measured by I Love Audio Network, the size of the speaker is about 10 mm.
Detail of circular adsorption magnet with charging box.
A buffer pad is arranged below the battery in the back cavity.
All wires under the buffer pad are welded on the motherboard, and there is conductive cloth for touch operation inside the shell.
Size comparison between battery and one-dollar coin.
Detail of positive and negative nickel plates with insulated highland barley paper.
Lithium-ion flexible battery model RD45 10 10, capacity: 0.11wh, voltage: 3.7V
Comparison of the size of main board and one-dollar coin.
List of circuits on one side of the motherboard.
List of circuits on the other side of the motherboard.
Metal contacts for charging headphones are soldered on the motherboard.
The metal contact on the side of the motherboard is connected with the conductive cloth on the earphone handle for touch operation.
The MEMS silicon microphone at the end of the motherboard is used for voice call pickup.
Ceramic patch Bluetooth antenna.
Two LED indicators with different colors.
0S 13 screen-printed battery protection IC.
Screen printing 233DR touch detection IC for touch operation.
JL Li Jie AC6936D Bluetooth audio SoC belongs to Li Jie AC693N series, which is the first patented technology of charging pin communication and adopts QFN 4*4mm ultra-small package design. Recently, Jerry also released the AC700N series TWS scheme.
Li Jie AC6936D supports Bluetooth 5. 1, 6mA ultra-low power consumption, automatic pairing, constant current charging, lossless decoding and HFi sound quality; Support stereo binaural call, second-on call, low-delay high-definition call, intelligent dual-engine master-slave seamless switch, support air upgrade, intelligent charging bin, easy to make.
According to my love for dismantling the audio network, at present, a large number of Bluetooth audio products of Fanta, Tezo, Philips, Motorola, Amazon, Lenovo, Elvis Presley, Xiaomi, Beth, Sony Ericsson, MEES and other brands have adopted Li Jie's scheme.
JL jerry AC6936D detailed map.
MINISO famous K66Pro true wireless Bluetooth headset disassembly family photo.
MINISO's famous K66Pro true wireless Bluetooth headset has a round square charging box and a handle-shaped in-ear design. The fuselage is made of pure white color and feels smooth. The fuselage is very light, and the weight of one ear is less than 4g, which improves the wearing comfort.
The internal structure and configuration are relatively simple. The charging box adopts Micro USB interface to input power supply, and has a built-in 220mAh polymer soft bag battery. The battery in the charging box is charged and discharged by Huaxin State PB 1 155A power supply to charge the earphone, and it also has overvoltage, overcharge, overdischarge, overcurrent and overtemperature protection.
As for the earphone, the earphone head adopts 10mm moving coil sound generating unit, and the battery capacity is 30mAh, all of which are connected with the motherboard in the earphone handle by wire welding. On the motherboard, Li Jie's Bluetooth audio main control IC is used for Bluetooth connection and Bluetooth signal processing. And a touch detection chip for touch operation function; MEMS silicon wheat is used for voice call pickup.