MP4 FM radio circuit

Shown is the FM radio circuit of MP4. The FM start signal passes through a switch Q14 to provide power supply voltage for the radio circuit.
The FM signal is received through the FM antenna, processed by the FM radio chip, and the audio signal is output. When the FM radio circuit is working, it also
needs data signals and clock signals from the CPU. It can be seen from the picture that the FM radio circuit in this Newman MP4 also has a reserved position
for installing a spare FM radio chip.
    The FM radio circuit has its own crystal oscillator . When testing the radio circuit , you can first use an oscilloscope to check whether the crystal oscillator signal is normal.