This second part continues the documentation of the Philips CDI 310 EMC/EMI Testing Unit with a detailed examination of the mainboard and the system ROM. It focuses on the electrical differences compared with the CDI 350, including removed components, altered circuits, and other modifications. If you have not read the teardown yet, you can find it in Part 1.

Originally being a CDI 350 mainboard, several components are not required in a CDI 310 — particularly those associated with the missing display and speakers. In addition to parts that were removed or replaced, many solder joints have been manually reworked, including most connectors and ground points.