Sony Bravia ir remote receiving board (part no. 1-857-331-21) is down; seems to be the diode stopped working but the only marking on it says, "846" and google won't tell me what that means. It is a 4 pin SMD with two pins going to ground. The pro tech who made this video has a schematic but gives no info as to where to get a copy. Thank you for any help. via /r/DIY https://ift.tt/2HYxwBA
