Sony WF-1000XM3 is a few excellent TWS true wireless Bluetooth headset, this time brings Sony Sony WF-1000XM3 disassembly, first from the charging box, finally disassemble the headphones.
The charging box is fixed using a card buckle with a double-sided adhesive. The snap is located on the upper edge of the charging case, and the double-sided adhesive is located at both ends of the charging box.
The plastic frame has a reinforcing rib, and below is a lithium battery.
The other side of the frame is not reinforced, used to place the board. There are USB TYPE-C interfaces, and the cable connectors, etc.
Indicates the light column throughout the light before and after the charging box.
Remove the motherboard and battery on the side of the charging box and the bottom.
The frame of the charging box is composed of three parts, and the C cover is combined with the lower portion.
Remove the C cover, it can be seen that the charging contact panel and the positioning magnet are located at both ends.
Three-pin charging contacts and positioning magnets close-up. The sub-plate and magnet are fixed by a structural frame.
Contact uses a gold-plated spring needle, with some protection components.
Pop thread closeup.
Detect the opening of the Hall element.
Hall chip closeup.
Next, look at the circuit board inside the charging box, and the lithium battery positive and negative lead directly welded to the board.
The rear USB TYPE-C interface is welded, firmly reliable.
The headphone charging box has a 14500 lithium battery with a diameter of 14mm and a length of 50 mm; capacity 700mAh / 2.59Wh, the brand is from Huizhou Hapeng Technology Co., Ltd. The charging cutoff voltage is 4.2V, where the red black cable corresponds to the positive and negative lead of the battery. Through CQC, KCC certification.
The battery is coded, numbered is C54837305571. The outer wall of the battery is packed by the insulated green paper.
The protective chip on the battery ensures safety. The chips here have a dispensing process.
Enter fuse and overvoltage protection tube.
The silk screen CJZ is TPS2553 for headset charging current limiting and short circuit protection.
TI TPS2553 detailed introduction.
The small chip under alloy inductance is a US letter MAX8696 for boosting the built-in battery to charge.
US letter MAX8696 detailed information.
US Amitting MX77734 ultra-low power power management chip, supports power path management and lithium battery charging and linear regulation.
US letter MX77734 detailed information.
A three-US regulator, powered by the MCU.
Freescale single-chip microcomputer for connection and charging box control, model MKL27Z64VFM4.
Freescale MKL27Z64VFM4 detail.
Charging box dismantling list. The headset dismantling is below.
Headphones are fixed using card buckles.
On the inside of the headphones, the upper large circle is a touch position, and the intermediate black foam is a noise reduction microphone pickup hole. The middle of the headphones is a dustproof, corresponding to the noise reduction microphone.
Sony Sony WF-1000XM3 uses a larger antenna, and the Bluetooth antenna of the headset is distributed around the black plastic frame. The middle of the headphones is a noise reduction microphone, and the outer side of the black plastic is metallized Bluetooth antenna, which can effectively ensure signal quality.
The battery is fixed in the inside of the antenna frame, and the metal sheet extending next to the battery is an negative electrode tab.
Two headphones layouts almost consistent, symmetrical arrangements.
Noise reduction microphone close-up.
The battery inside the earphone looks like a button battery, in fact, a lithium battery that can be recyclable.
Sony Sony WF-1000XM3 headphones use Varta Valta CP1254 lithium batteries, 3.7V 0.2Wh, Origin Germany. After contrast with coins, it can be seen that this battery is very small.
The central approximately circular gold contact is the negative contact of the battery, contacting the extended metal sheet. This board is the battery protection chip, Bluetooth receives chips and indicators.
The approximately circular gold contacts in the figure is the positive electrode contact of the battery, in direct contact with the battery.
The back of this circuit board is a charging terminal.
The main control circuit of the headset is contrast to a dollar coin size.
The internal structure and circuit are all behind the headset dismantling.
Infrared distance sensor close-up.
Headset FPC flexible circuit board closeup.
Headphone unit and noise reduction micro wind. Sony Sony WF-1000XM3 smart design has built-in 6mm drive unit, allowing mini-size headphones to exhibit detail, clear and transparent, wide and well-domain.
Silver bright surface chip is Sony's own HD noise reduction processor QN1e. Sony Sony WF-1000XM3 processes the captured environment noise to eliminate noise interference of various frequency bands. The processor integrates digital noise reduction, 24bit sound signal processor, digital analog converter, and amplifier to achieve high signal-to-noise ratio and low distortion shock sound.
With the Sony Headphones Connect App, you can also manually adjust the noise reduction grade (a total of 20) through the application to open a personalized noise reduction experience.
FPC base close-up on the headphones.
The chip number ID D3781835 is SONY home noise reduction chip.
Silk screen number 310819078266C chip close-up.
Silk screen number chip close-up.
Screen print number E4MW chip close-up.
There is a master chip, a memory, an LED indicator, and the like on the headphone board.
The charging terminal is the terminal corresponding to the top of 3 metal shrapnels.
Battery protective chip.
Multicolor LED indicator close-up.
Silk screen number Q128FWY chip is a memory chip.
Clipping of the crystal and other components on the motherboard.
SONY Sony WF-1000XM3 uses MTK (Garid) MT2811 platform scheme, this chip is equipped with MCSync TWS double-Bluetooth transmission mechanism, support the main seamless connection experience from the interchange, and supports Bluetooth 5.0, Ultra Low Power, etc. Google Bisto Voice Assistant and other functions.
It is reported that MT2811 is a high-performance chip in the AB155X platform series.
The inside of the shield is the MTK MT6388P power management chip.
These are all Sony WF-1000XM3 disassembly, and the entire headset is combined by dozens of components, and there are also many components on the PCB board. Thanks to the smart design of the Sony Sony engineer, each module is convenient, assembled, and after disassembling, the dismantling engineer of my love audio network can still restore it.
Summarize
SONY Sony WF-1000XM3 either industrial design, or circuit design, Sony has embodied SONY in TWS true wireless Bluetooth headset, and there is a numerous innovation, square, both to ensure sound quality, but also to reduce the noise, but also consider battery life. Prior to this, these three were better than fish and bear paws.
The dismantling of Sony Sony WF-1000XM3, not only saw SONY's latest noise reduction chip, but also saw MTK TWS Bluetooth headset solution for Sony tailored.
Since the first generation of "noise reduction beans", it has passed in the past two years, and the technology has also been broken. Such as the chip process is improved, Bluetooth 5.0 is popular, double technology mature, etc., combined with Sony unique noise reduction technology, software and hardware, technical and artistic combination, let the new generation "noise bean" WF-1000XM3 is available.
By now, the Sony Sony noise reduction headset family is finally covered with heads, neck, and the most difficult TWS type three-in-one. Can SONY Sony WF-1000XM3 become a classic such as WH-1000XM3, Wi-1000X, we will wait and see.
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Source: 52AUDIO
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