Teardown of a Belkin F5D7130 reasons through why the manufacturer might have opted for the two-PCB design for this version of the popular router.
After removing the two Philips head screws, the gentle twisting application of a flat head screwdriver around the side edges of the device enabled separation of the top and bottom sections, revealing a dual-PCB sandwich inside: Click to enlarge. Broadcom's BCM4306 baseband/MAC (media access controller) chip on the supplemental PCB (above) dominates the initial-view landscape, along with a mysterious metal shield and, above it, the two antenna connectors and cables. Above and to the left of them (and just below the wired Ethernet connector) on the primary PCB (below) is a LANKom Electronics LF-H41S transformer. To the left of the Ethernet connector is the system reset switch; to the right is the 5V/2A "wall wart" power connector. On the far right of the primary PCB is a 20-pin connector, which I believe implements a JTAG port function. And in the bottom right corner is a Texas Instruments SN74LVC04A hex inverter, with a Philips (now NXP) 74LVC32A quad 2-input OR gate (PDF) below it....
Comments will be approved before showing up.