Here is an overview shot of the ”chalk' Google Home Mini smart speaker. For scale, note that the unit is 3.86' in diameter and 1.65' high.
Remove four T6 Torx screws and wriggle the speaker grill off the base, then remove the ribbon cable from its connector to separate the two halves.
Here is a closeup of the still-installed assemblage that handles the USB power connection (to the right), the reset switch (above it) and the microphone enable/disable switch (to the left).
Remove three more Torx screws and the PCB comes into full view. It lifts right off the plastic chassis, revealing (among other things) the flexible reset 'button.”
Turn the PCB over, and the reset switch that the 'button' actuates comes into view.
A T9 Torx bit was needed to remove the impressively hefty speaker from the remainder of the assembly.
Remove four more T6 Torx screws and you're able to lift away the mostly-metal shield in-between the speaker and the primary system PCB. The cone-shaped protrusion in the center of the side facing the speaker is intended to spread out the sound coming from the transducer in an omnidirectional fashion. By being primarily metal in construction, it acts as a means of heat dissipation, as well as providing additional rigidity and heft to the overall assembly.
On the primary PCB, the PCB-antennas are clearly visible, as is the conductive 'tape' on either side for the touch volume controls. There are MEMS microphones on either side, and at the very center is Texas Instruments' TAS5720 class D audio amplifier, which drives the speaker.
Inside the metal shield is the combination of Marvell's 88DE3006-BTK2 system SoC and a Toshiba TC58NVG1S3HBA16 2 Gbit SLC NAND flash memory.
The back of the PCB also had a metal shield covering the Marvell Avastar 88W8887 SoC, which tackles the 1×1 Wi-Fi, Bluetooth 4.2, and NFC duties.
Removing another metal shield revealed a SK Hynix H5TC4G63CFR-PBA 4 Gbit DDR3L SDRAM.
In the middle of this side of the PCB is the row of four LEDs, capable of a full RGB output range.