I'm working through a full restoration of a Performa 550 w/ Apple IIe card and it has this microphone board (820-0388) with two leaky capacitors. I'm not sure if these are 33u or 4.7u capacitors (tempted to believe they're 4.7u and the 33 is the series or something like that). I can try to desolder and measure them but I don't have much luck desoldering corroded SMD caps off the board; I prefer the twist-off method. I searched through here a bit and didn't find a thread where someone was asking about them.
