Boot tested are not synchronized with digital meter measures the frequency of about 14.5k, doubt, central line potentiometer adverse, new change, the fault invariant, ic501 (an5435) the pin voltage is completely normal, substitution on line oscillation, AFC capacitor are invalid, the last check. The power supply filter capacitor c510 (47u/25v) capacitor into 31uf, replaced with a 100uf/25v capacitor, the troubleshooting, nearly the original parts reload, image is still normal, that the original fault is a power supply filter capacitor caused by vibration.nrfservice manual download site