Sony PlayStation PULSE Explore (CFI-ZWE1) FCC Teardown
The FCC internal documents for the PlayStation PULSE earbuds are finally available. Time to dive in and see what they reveal.
Starting off with the case, the exterior piece which holds the earbuds looks to be glued into place, so a spudger and force will be required to remove it.
- Case main PCB
- Status LED PCB
- Link button PCB
We can see the battery on the back of the case. The long wires connect the charging terminals to the main PCB. I do not see any magnets to align the earbuds, but difficult to tell from these photos. Moving to the battery next, the model number is 541963, but this was revealed in a previous certification. The battery is attached using a black adhesive strip, visible in the photo below.
The supplier is Springpower again, with a rating of 780mAh/3.0Wh at 3.85V.
Here we have the main PCB which is placed on the right side of the case. We can see the USB type-C port, the battery connector, and a controller chip. I do not see any resettable fuses on the board, so perhaps the battery protection circuit has them, or protection ICs.
While the full text on the controller chip is not visible, this is the NXP KL28, which is the K32 L2 Ultra low power MCU from NXP. The chip used here has 64KB for flash memory size, for comparison, the WF-1000XM5 uses a MCU with 128KB flash memory.
This is the link button PCB with the button in the middle of the left photo.
The LED PCB has 2 LEDs and not much else. I wonder if Sony could have used a flex PCB with the LEDs rather than the setup we see here. The flex PCB could then just slot into a connector on the main board.
