Dual Hybrid Noise Canceling for Wideband and Deep Noise Suppression

Superior Call Quality with JustMyVoice™ Technology using an Utterance Detection MEMS Microphone.

Ambient Sound Mode

8 mm Driver Unit with Biocellulose Diaphragm - "Acoustic Control Chamber"

7 Hours Playback

Bluetooth 5.2

Capacitive Touch Sensor Control

What is in the box

Headphones / Charging Case

USB 'C' Cable

Headphone rubber tips for different ears sizes

User's Manual

Charging case with headphones

Close up view of headphones

Side View of the Headphone

USB D+ / D- Interface

Charger Interface VBUS/GND

Speaker Sound Port with MEMS Microphone at the back of the port

Utterance Detection MEMS Microphone is located in this area

Light Pipe for the light detector

Microphone Port Probably for Voice Calls. Covered by cloth and metal grids

Surrounding Sound Microphone

View of Headphone with rubber ear piece removed

Since the Technics Headphone enclosure was glued together, the only way in was to cut into the headphone. The glue was light and the Touch Sensor cap came away with only a little force applied around headphone at the Touch Sensor cap seam

Since the headphone was easy to open to access its components, it may be possible to perform battery changes without damaging the headphone. This is the first possible self serviceable headphone that I have performed a teardown on

A utility knife was used at the Touch Sensor cap seam to help loosen and pry the Touch Sensor cap loose. When the Touch Sensor cap appeared loose, a Jimmy Tool was used to pry the cap free to open the headphone

Once opened, we get our first look at the inside of the headphone

Battery

Speaker Chamber

Bluetooth Radio/MCU and Antenna

MEMS Microphone

Opening up the headphone, we can see the main PCB, Antenna, and Battery

Battery is Li-ion 3.7V / 0.32Wh or 3.7V / 86mAh. The battery appears to be from VDL Electronics Co., Shenzhen, China

MEMS Microphones for Voice Call and Surrounding Sound

Antenna

Double Side Foam Tape

With the battery moved out the way, we can see the USB and Charging Interface connections, and Speaker Chamber

USB and Charging Interface Connectons - well marked and with test points

Speaker Chamber

Peeling back the Antenna from the double sick tape revealed the Main PCB, and that the Main PCB is held in place with a Phillips Head #00 Screw that was also marked on the PCB

Once the Phillips Head screw was removed, a small plastic collar had to be removed using tweezers to access the touch sensor PCB

With the Main PCB moved out the away, the touch sensor was pried out using a pry tool.

Care must to be taken with this step as it is easy to crack the Touch Sensor PCB while prying it out

Double sided foam tape was used to hold the touch sensor in place

Turning our attention back to the Battery side of the Headphone and moving the battery out of the way, we see that the USB and Charging Interface PCB is also held in place with a Phillips Head #00 Screw

Removing the screw, and gently prying against the Charging and USB Interface PCB allowed it to come free and be removed from the Headphone Enclosure

The USB and Charging / Interface PCB was held in place via double sided foam tape

While removing the USB and Charging Interface PCB, a small circular disk was found covering the larger connection hole on the enclosure. This disk is magnetic may be used to help hold the headphone in the charger. The disk was also held in place with foam tape

Now, on to removing the Speaker Chamber. The Speaker Chamber has a backside MEMS Microphone used for Noise Cancelation and Speaker Sound detection

Another nice find here, was that the Speaker Chamber MEMS Microphone flex PCB was connected to the Main PCB via a low force latching connector. Lifting the connector latch allowed the MEMS Microphone PCB to come free

This flex PCB also host the Battery wire solder connections for the system

MEMS Microphone PCB connector

Battery Wire Solder Tabs

MEMS Microphone located on the Speaker Chamber

Speaker Chamber

Front side and Backside views of the Speaker Chamber MEMS Microphone PCB

MEMS Microphone is marked 102 ARC

Could not cross the part number. If you know the part, please leave a comment below.

The 2D bar code on the part reads "FMV1026600TKAR1M"

Closeup view under the Antenna of the Main PCB

DSP Group - C3A1A may be a Hybrid Active Noise Cancellation (ANC) Codec and Audio Digital Signal Processor (DSP)

Could not cross the part number. If you know the part, please leave a comment below

DSP Group - D10LB may be a SoC with DSP and Neural Network Accelerator functionality

Could not cross the part number. If you know the part, please leave a comment below

MEMS Microphone for voice and surround noise detections - marked 102 ARC

Could not cross the part number. If you know the part, please leave a comment below

The 2D bar code on the part reads "FMV1026600TKAR1M"

Close up view of the Antenna.

Under a backing light, no antenna structure was seen

Backside close up view of the Main PCB

AIROHA AB1565M - ARM Cortex M4/Bluetooth 5.2 Dual Mode with Active Noise Cancellation

Labeled 9FB 06

Labeled LGV

Crystal Oscillator

Labeled SVA CP SH0

Labeled C 1BQ

Could not cross the part number of the components listed above. If you know the parts, please leave a comment below

Close up view of the Top and Bottom side of the Touch Sensor PCB

Turing our attention back to the USB and Charger Interface board

Backside and Top Side views

Vesper VA1200 - Analog Piezoelectric MEMS Voice Accelerometer. Bone Sensor - used for Utterance Detection

Speaker Solder Connections

Unknown component - marked XDR[?]

Unknown Component - may be for light detection

Charger [power] / USB Connection Interface pads

If you know any of the unknown components, please leave a comment below

Battery Interface Connection to the system - Top side and backside views

Dual MOSFET Battery Protection IC. Markings hard to read. Similar to a part used on other Technics Headphones

Unknow component - Labeled 9FB 06

Battery Solder Pads. Well marked with + / - markings

If you know any of the unknown components, please leave a comment below

Clouse view of the speaker in the speaker chamber and the speaker removed from the speaker chamber

Tweezer were used to pry and pull open the speaker chamber to release the speaker

Teardown Exploded Top Side and Backside views of the Headphone