Faulty transistor in a Samsung TV Main Board

[PatrickSaw]

Hello!

I have a Samsung TV UE32C5100QW. Main board: BN41-01549C.
Fault: Dont power ON, unless you insist a lot.

I've located a bad transistor, and if I heat it, TV power ON fine.
Transistor is marked like: 72C, and in the board: D1201.
How I could find this transistor model, to buying the same and replace it?

You can see it here.


Thanks in advance!

[ReeceyBurger123]

Re: Faulty transistor in a Samsung TV Main Board

Hmm its unlikely the transistor at fault. Ive seen that these boards have issue with broken Bga solder joints so yours might be as well as it becomes heat-sensitive. I would say you might need to reflow your board.

[tw2005]

Re: Faulty transistor in a Samsung TV Main Board

well if it's labelled D1201 it's a diode and if you have a decent multimeter you should be able to check if it's functional or not. How are you heating this up to keep it localised and be sure it's this part?

In the meantime I'll see if I can find a possible match for that code

[PatrickSaw]

Re: Faulty transistor in a Samsung TV Main Board

Hmm its unlikely the transistor at fault. Ive seen that these boards have issue with broken Bga solder joints so yours might be as well as it becomes heat-sensitive. I would say you might need to reflow your board.

well if it's labelled D1201 it's a diode and if you have a decent multimeter you should be able to check if it's functional or not. How are you heating this up to keep it localised and be sure it's this part?

In the meantime I'll see if I can find a possible match for that code

Well well. I've listened you, and I checked again: focus heating in D1201... MEC!!, TV dont turn ON. Maybe yesterday I was tired... but it was a big mistake. A good focus heating, and I've found the fault: IC AOZ1031AI (in the pic, to the left of the word "LARGE"). I've replacement for this, so I win.

Detail faulty:
1) Dont Turn ON. Fixed red LED
2) Heat in IC Z1031AI
3) Power ON right
4) Switch OFF >> ON
5) Again step 1), with fixed red LED


I expect this helps someone.