Features:

Exceptional Sound and Noise Cancellation. Multiple MEMS microphones

Optimum Sound Isolation

Strong, Stable Connection

High-Quality Calling Sound

Approximately, 6 hours playback, and up to 20 Hours of use with charger

Bluetooth® 5.0

Capacitive touch sensor control

What is in the box

Headphones / Charging Case

USB 'C' Cable

Headphone rubber tips for different sizes of ears

User's Manual

Charging case with headphones

Close up view of headphones

Side views of Headphone

MEMS Microphones

Speaker Spatial Vent Port

Speaker Sound Port

Speaker Vent

USB Interface

Charger Interface

Vent Port

View of Headphone with rubber ear piece [cap] removed

Vent Port

Since the Panasonic Headphone enclosure is glued together, the only way in was to cut into the headphone.

This is a destructive teardown

A Razsor Knife was use to cut into the Panasonic headphone along the seam in the headphone. Then a Jimmy Tool was used to open up the headphone

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

Opening up the headphone, we can see the main PCB, Battery, Speaker, etc. Tweezers and a Pick Tool were used to removed the electronics from the enclosure

Double sided foam tape was used to hold the main the PCB to the Battery and to the Touch Sensor / Antenna PCB. This foam tape had to be cut free. Then Denatured Alcohol was used to remove the foam tape glue from the PCBs and Battery

Battery

Main PCB

Speaker Area

Touch Sensor and Antenna

Double Sided Foam Tape

At first, I wasn't sure about the solder balls. Then I realized they are used to anchor the USB and Power Interface pins on the outside of the Headphone to the internal circuit board.

I had to used a soldering iron to remove the solder balls, so that the internal interface circuit board could be removed. I had to also remove solder from the speaker wires to free up the internal circuit board.

The internal circuit board was also attached a MEMS Microphone that appeared to be monitoring the Speaker Chamber of the Headphone, since it was faced in. I had to remove the outside panel with 'R' on it with a Razor Knife to free the MEMS Microphone. Once the MEMS Microphone was freed, the interface circuit board could be pulled out

USB and Power (Charger) Interface

MEMS Microphone

Sound Ports

Speaker Wires

Internal Circuit Board that interface Power and USB to the Headphones

There was not much to see on the internal interface board. The was one IC component that could not be crossed. If you happen to know the component, please leave a comment below

Unknown Component

Full Sensor Flex/Charging PCB IC Identification:

Next the Speaker sound chamber cover was removed with the use of a Pick Tool and Tweezers. A Razor Knife was used to cut the glue holding the speak in place

The speaker had no identifiable markings

With Speaker removed, we can see the sound chamber and sound ports

Closeup view of the Battery

Li-Ion 3.7V, 0.32Wh

The battery appears to be from VDL Electronics Co., Shenzhen, China

Closeup view of the Antenna/Touch Sensor side of the Main PCB

DSP Group - C2A1A Hybrid Active Noise Cancellation (ANC) Codec and Audio Digital Signal Processor (DSP)

651DF1M9 - Could not cross part number, but during a web search found out that it may be an integrated battery management IC

W25Q32JWUUIMTR- SPI FLASH 32Mb

MEMS Microphone Port

Closeup view of some of the components on the Antenna/Touch Sensor side of the Main PCB

DSP Group - C2A1A Hybrid Active Noise Cancellation (ANC) Codec and Audio Digital Signal Processor (DSP)

W25Q32JWUUIMTR- SPI FLASH 32Mb

651DF1M9 - Could not cross part number, but during a web search found out that it may be an integrated battery management IC

Battery side close up view of the Main PCB

AIROHA AB1552 - ARM Cortex M4/Bluetooth 5.0 Dual Mode

927 MPS1 MEMS Microphone. The Headphone uses three MEMS microphones with this part number

Could not cross the part number. If you know the part, please leave a comment below. The 2D bar code on the part reads as STM927352NH2S011

Crystal Oscillator

Unknown component. Labelled B2A. Please leave a comment if you happen to know this component

Unknown component. Labelled SV4CP 240. Please leave a comment if you happen to know this component. Separated from PCB during teardown

Closeup view of some of the components on the Battery side of the Main PCB

AIROHA AB1552 - ARM Cortex M4/Bluetooth 5.0 Dual Mode

927 MPS1 MEMS Microphone. The Headphone uses three of these MEMS microphones

Could not cross the part number. If you know the part, please leave a comment below. The 2D bar code on the part reads as STM927352NH2S011

Unknown component. Labelled B2A. Please leave a comment if you happen to know this componentNew line.

Closeup view of top and bottom side of the Touch Sensor Flex PCB and PCB Antenna

Full Main PCB IC Identification:

Predicted Block Diagram of the Panasonic RZ-S50W Bluetooth Headphones:

Teardown Exploded View of the Panasonic Headphone