Diode and capacitor part of a circuit: I don't understand it
It looks like the diode is there to discharge the capacitor when the power is removed.
And the capacitor looks like a part of RC-delay circuit intended to reset the main IC when power is applied. Is there a resistor between Reset (pin 8 of the main IC) and its Vcc somewhere? Datasheet for MB88541 chip describes that reset pin as having an internal pullup resistor, see e.g. page 15 here.