Tuning unit circuit and vehicle-mounted entertainment system

The embodiment of the utility model provides a tuning unit circuit and a vehicle-mounted entertainment system. The tuning unit circuit comprises a first PCB, a tuner chip arranged on the first PCB, and a peripheral circuit arranged on the first PCB and electrically connected with the tuner chip. And one side of the first PCB is also provided with a pin which is used for being inserted into a second PCB, so that an electronic component on the second PCB receives an audio modulation signal of the tuning unit circuit through the pin and processes the audio modulation signal. When a tuner chip and a peripheral circuit in the tuning unit circuit need to be replaced, only the tuning unit circuit needs to be rearranged to generate a new PCB, the PCB of the whole vehicle-mounted entertainment system does not need to be redesigned, and the development cost is reduced. 本实用新型实施例提供一种调谐单元电路及车载娱乐系统，所述调谐单元电路包括第一PCB板、设置于所述第一PCB板上的调谐器芯片及设置于所述第一PCB板上与所述调谐器芯片电性连接的外围电路；所述第一PCB板的一侧还设置有用于插接到第二PCB板上的引脚，以使所述第二PCB板上的电子元器件通过所述引脚接收所述调谐