Inside the LG BP620 3D Blu-Ray set-top player.
Its main board (pictured) is made using a high-volume-optimized combination of solder reflow (top) and wave (bottom). Dimensions of this board are roughly 120mm x 100mm, and it connects to the off-line switch-mode power supply and interface break-out board, which is a single-sided phenolic construction, by means of the 1x16-pin 2.54mm through-hold header CN150.
The power board provides 5.1V and a front-facing USB port (exposed through the bezel) as well as a button cluster handling eject, play/pause, stop and power buttons, and a 4 x 7-segment LED display for time etc.
The Wifi board (using an inexpensive Ralink single-chip implementation frequently found in super-small low-cost USB-wifi adapters) is connected by USB to the main CPU via connector CN803. It includes 5V, GND, D+ D- and a special wake-up signal.
Interestingly, two apparently different RAM BGA chips are used for the main memory - I didn’t check to see if they share the same pinout. I wonder if they’re actually for different purposes and have different specifications?















