How do you find replacement parts???

[HiDesertRat]

Working on the Y Main for a Samsung model PN51D550C1FXZA, it has part number LJ92-01763A REV AA4 board installed in it.

Do you know if the "DFG" designation, on top of the heat sink, means anything? Have found boards the have DF, DHG, on them and they seem to be a bit different, very few with the DFG designation.
Is there a better part number to use when looking for this board?

.....would like a schematic of the board.

From the checks I have made: D4103,Q4101, Q4104, D4302 are all shorted. Q4301 and Q4302 are shorted on one side (assuming pins are source, gate, drain) these would be shorted gate to drain.

Now the question would be: what would cause all of these to go bad or is it some sort of chain reaction? If these are bad, is there a standard replacement procedure of parts to replace?

I can't even seem to cross the part numbers to find the correct parts! D4103 and D4302 are AUK 61825 SF10A400H; Q4101 and Q4104 are 30G124; and Q4301, Q4302 are RJP30H1.

I haven't been able to cross this part numbers anywhere, can't find spec sheets.....nothing. What am I doing wrong?!?!?!

Thoughts?

[kasfamily]

Re: How do you find replacement parts???

http://datasheetbank.com/datasheet/T.../GT30G124.html

[kasfamily]

Re: How do you find replacement parts???

http://ru.aliexpress.com/item/GT30G1...358851031.html

[HiDesertRat]

Re: How do you find replacement parts???

Thanks KASFAMILY. That one I did find, it was the other ones I seem to really be having an issue with. Plus, I was hoping to get them somewhere on this side of the pond, if possible.

[kasfamily]

Re: How do you find replacement parts???

Ok!

[selldoor]

Re: How do you find replacement parts???

Basically you are using the wrong board numbers and wrong part numbers
Board number might be the one actually on the silkscreenprint on the board but
for a version change it would be the number on a barcode label. Straight on decent well lit in focus picture of the board would help.
Stamp in the heatsink may be a factory designation or checker mark
AUK41826 = K1820 AUK 61825=10A400H RF1501=RF1501 RJP30H1= P30H1

All datasheets available at alldatasheet.com.

[ben7]

Re: How do you find replacement parts???

It just seems to take practice to identify part numbers. Usually they are a combination of numbers and letters. However, most usually will have more than one number in a group .....eh, I don't know how to explain it!

You just get the hang of it after a while. On occasion, the full part number isn't listed. Like, a transistor might have "C2073" on it. It is actually "2SC2073", the "2SC" means it is an NPN transistor. A "2SK" prefix, (say, a transistor marked "K1058") is actually for an N-channel MOSFET.

http://en.wikipedia.org/wiki/JIS_sem...or_designation
http://en.wikipedia.org/wiki/Transis...specifications

Like I said, it just takes practice....

I'm glad we could help though