Einleitung
A look inside the Panasonic RZ-S50W (Japan) / RZ-S500W (Outside Japan) Bluetooth Headphones
Was du brauchst
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Features:
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Exceptional Sound and Noise Cancellation. Multiple MEMS microphones
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Optimum Sound Isolation
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Strong, Stable Connection
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High-Quality Calling Sound
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Approximately, 6 hours playback, and up to 20 Hours of use with charger
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Bluetooth® 5.0
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Capacitive touch sensor control
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What is in the box
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Headphones / Charging Case
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USB 'C' Cable
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Headphone rubber tips for different sizes of ears
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User's Manual
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Side views of Headphone
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MEMS Microphones
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Speaker Spatial Vent Port
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Speaker Sound Port
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Speaker Vent
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USB Interface
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Charger Interface
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Vent Port
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Since the Panasonic Headphone enclosure is glued together, the only way in was to cut into the headphone.
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This is a destructive teardown
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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
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Once opened, we get our first look at the inside of the headphone
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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
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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
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Battery
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Main PCB
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Speaker Area
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Touch Sensor and Antenna
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Double Sided Foam Tape
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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.
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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.
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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
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USB and Power (Charger) Interface
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MEMS Microphone
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Sound Ports
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Speaker Wires
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Internal Circuit Board that interface Power and USB to the Headphones
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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
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Unknown Component
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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
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The speaker had no identifiable markings
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With Speaker removed, we can see the sound chamber and sound ports
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Closeup view of the Battery
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Li-Ion 3.7V, 0.32Wh
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The battery appears to be from VDL Electronics Co., Shenzhen, China
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Closeup view of the Antenna/Touch Sensor side of the Main PCB
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DSP Group - C2A1A Hybrid Active Noise Cancellation (ANC) Codec and Audio Digital Signal Processor (DSP)
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651DF1M9 - Could not cross part number, but during a web search found out that it may be an integrated battery management IC
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W25Q32JWUUIMTR- SPI FLASH 32Mb
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MEMS Microphone Port
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Closeup view of some of the components on the Antenna/Touch Sensor side of the Main PCB
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DSP Group - C2A1A Hybrid Active Noise Cancellation (ANC) Codec and Audio Digital Signal Processor (DSP)
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W25Q32JWUUIMTR- SPI FLASH 32Mb
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651DF1M9 - Could not cross part number, but during a web search found out that it may be an integrated battery management IC
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Battery side close up view of the Main PCB
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AIROHA AB1552 - ARM Cortex M4/Bluetooth 5.0 Dual Mode
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927 MPS1 MEMS Microphone. The Headphone uses three MEMS microphones with this part number
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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
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Crystal Oscillator
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Unknown component. Labelled B2A. Please leave a comment if you happen to know this component
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Unknown component. Labelled SV4CP 240. Please leave a comment if you happen to know this component. Separated from PCB during teardown
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Closeup view of some of the components on the Battery side of the Main PCB
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AIROHA AB1552 - ARM Cortex M4/Bluetooth 5.0 Dual Mode
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927 MPS1 MEMS Microphone. The Headphone uses three of these MEMS microphones
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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
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Unknown component. Labelled B2A. Please leave a comment if you happen to know this componentNew line.
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Closeup view of top and bottom side of the Touch Sensor Flex PCB and PCB Antenna
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