I have perhaps foolishly tackled the repair of my freeview box - Tvonics MDR-250 - for which no service information appears to be available. I'm an amateur, btw. (Fault is it's powering on and immediately shutting down repeatedly.)
I have a suspect component, marked Q700 on the PCB, suggesting that it's a transistor of some sort, and marked 654Z. I've tried googling for this part number but can't find any information.
Its a 6 legged device, and I don't know of any 6 legged types of transistor. The only alternative device I've come up with is an opto- isolator - though I don't know what the standard PCB identifier would be for one of these.
2 pairs of pins are connected together, so there are effectively 4 legs. It's in a very cramped part of the board (next to the power socket and what I think is a fuse on it's own little sub-board) so I can't really work anything out from what it's connected to.
Anyways, I need some info because it's either completely short circuit, or it's connected to something which is completely short circuit, and I can't do much unless I find out what the thing is.
Any suggestions welcome TIA Alexis