Hi,
this is my first message ever on the eevblog forum so apologies in advance if I make any stupid mistakes.
My sisters TV failed a couple of weeks ago, it just went dead, no picture no standby light, no nothing. The TV being five years old was promptly replaced with a new set, a Sony this time. Anyways my sister gave the TV to me in the hope that I would be able to repair it. I'm quite the noob when it comes to stuff like this. Previously I've replaced broken caps in sundry equipment but this time it doesn't seem to be the caps.
I opened the TV and checked the PSU, which has the designation FSP163-4FS02. It didn't take me long to figure out that the fuse was blown, so I quickly got hold of the appropriate replacement (several just in case). I replaced the fuse, put the TV back together and connected the mains lead ...
baaam
well from within the TV a crack could be heard and then nothing
I have now opened the TV again and, surprise, the fuse had blown. Now to be fair, just replacing the fuse was probably not going to fix anything, there's usually a reason for a fuse to go bad. So, after having made sure that the caps were discharged I started to check components hoping to find something faulty.
I have found three broken components so far, one shorted diode (see below) and two failed mosfets (FDPF 9N50NZ), perhaps that's enough to cause the fuse to pop. Since there might be more failed components in the PSU I will have to continue my search tomorrow. In the meantime I have two questions:
1. I'm unable to identify the shorted diode which makes it difficult to order a replacement. The cathode band is red, or possibly brown, and the only text on the diode is T2D 2
0, the last digit is underlined. The diode is next to an IC marked BD5AQ B117H NYA. Does anyone know what kind of diode this is and what a suitable replacement might be?
2. There are some resistors on the board with 'strange' markings and very low or no resistance. One of them has, unless my eyes are deceiving me, the following color codes: Brown - Green - Silver - Gold - Green. I haven't seen such markings before, what do they mean?
Best regards,
Jan-Olof