PCB components identification and reference designators?
Q2 is a SMT transistor in what's known as a SOT-23 package -- there will be a short (3 character or so) code marked on it that can be looked up in a SMT guidebook online to find the full part number.  ECx are electrolytic capacitors (why EC and not C? designer preference I suppose).  REC1 is a remote control IR receiver -- these are basically commodity parts these days.  The IC is indeed probably a microcontroller, perhaps mask programmed and house or otherwise custom marked instead of carrying full manufacturer markings.