42"Fluid plasma tv Mod#(Samsung)pn50b550t2f

[vinceroger69]

Re: 42"Fluid plasma tv Mod#(Samsung)pn50b550t2f

see what other peoples thoughts on it possibly being a bga issue first as you could do damage trying to remove the heatsink (glued on i think but usually come of quite easily) i have a hot air station but in the past have used a heat gun on them but its quite risky as too much heat can damage them too. basically you just want to melt/reflow the solder balls under the ic (but this sometimes only last a short while) but that may not be the issue it could be a lot of diffrent things

[rich-t]

Re: 42"Fluid plasma tv Mod#(Samsung)pn50b550t2f

It's all explained in post # 1.
how do I get that finned heat sink off the chip? Just heat everything and try to get it to flow?

[vinceroger69]

Re: 42"Fluid plasma tv Mod#(Samsung)pn50b550t2f

ive had a quick look for a replacement board but cant seem to find one to match so not sure what too suggest now i dont know if these sets suffer from bad bga soldering on the chip thats under the black heatsink, i wonder if its worth removing the heat sink and reflowing that ic with some heat? the only other option i guess is to phone around and see if theres a repair service available? A question though have you saw this tv working? is the panel fine no lines etc as if so it may not be worth spending too much cash on this tv.

[rich-t]

Re: 42"Fluid plasma tv Mod#(Samsung)pn50b550t2f

on the top right main logic board it has the following no's

model no. 42 hd wd w3 lm
pcb no. LJ41-05078
REV. R1.729 (08 03 26

NO'S ON MAIN BOARD- TAG ON CABLE TUNER
TD 1636EF / FGMP-2
3139 147 269819
0818 SV20 000000
SMALL GREEN TAG 29C69C5C
O81015
SMALL BLUE TAG P0151-
ge421axa2h
bottom small green tag
141668

Tag under bar code bottom of main(tuner board)
ptd5u1108b00104
45 899 ksige21axa2h rev.01

[rich-t]

Re: 42"Fluid plasma tv Mod#(Samsung)pn50b550t2f

pic 1 above the black heat sink whats that long number?

That no. is 200-100-iv501b-ch rev c.

[vinceroger69]

Re: 42"Fluid plasma tv Mod#(Samsung)pn50b550t2f

pic 1 above the black heat sink whats that long number?

[rich-t]

Re: 42"Fluid plasma tv Mod#(Samsung)pn50b550t2f

Find the schematic for it bud and get testing the regulators etc and fuses on the board. If not what is the model of the pcb ?

Hi, Reecey, I've tried to find this board on any site I could find that has samsung manuals etc. but no joy, this is a real odd ball. It has 50+ caps, various chips and ic's etc. but no fuses and no recognizable no's on the board that makes sense (3 small paper tags). I'm attaching some pic's of the top of the board and 1 of the bottom which has a bar code and a no. I;m also sending pic of the logic that is screwed on top of it that has the regular type no.s.
Hope you can help. Tessting of all these components if way above my pay grade. :-)

[ReeceyBurger123]

Re: 42"Fluid plasma tv Mod#(Samsung)pn50b550t2f

Find the schematic for it bud and get testing the regulators etc and fuses on the board. If not what is the model of the pcb ?

[rich-t]

Re: 42"Fluid plasma tv Mod#(Samsung)pn50b550t2f

Reeceyburger123, Would you perhaps know where Ican find out how to test and repair this main board? I can't find one anywhere.

[rich-t]

Re: 42"Fluid plasma tv Mod#(Samsung)pn50b550t2f

Well, can't find a board so I guess I'll have to find someone who know how to test and repair it, or scrap it, :-(

[vinceroger69]

Re: 42"Fluid plasma tv Mod#(Samsung)pn50b550t2f

the picture you circled that wrong lead in blue thats the board you need with the hdmi ports on (post 36) whats the part number from that board? we need the part number from the board in your tv so we know its the right one

[rich-t]

Re: 42"Fluid plasma tv Mod#(Samsung)pn50b550t2f

I guess I'll have to check on another manual because looking at the 1 shown don't seem to have a tuner??? and the parts description calls it a LOGIC-main board.

[vinceroger69]

Re: 42"Fluid plasma tv Mod#(Samsung)pn50b550t2f

just to make sure reece now hes ran the tests and the test patterns show up ok etc its the mainboard with hdmi/tuner thats at fault and will need to make sure board is for his country regarding the tuner etc thanks reece im still learning too.

[ReeceyBurger123]

Re: 42"Fluid plasma tv Mod#(Samsung)pn50b550t2f

Mainboard-hdmi inputs etc.

[vinceroger69]

Re: 42"Fluid plasma tv Mod#(Samsung)pn50b550t2f

im a ex mechanic but hey thats getting more into electronics to with ecus/can bus etc etc so loads more to fault find lol , as i say i may be wrong hence why saying wait for conformation as to which board im more used to fixing lcd/not plasmas i was more concerened you waited ages if you had ordered the wrong board and you could of found the correct one in that time.

[rich-t]

Re: 42"Fluid plasma tv Mod#(Samsung)pn50b550t2f

Did you get that link to work? THe board listed as no. 2 they call the main board. Why are electronic nomenclature so confusing? in mechanics we don't call a piston a wheel. lol.
Oops , already ordered. :-(

[vinceroger69]

Re: 42"Fluid plasma tv Mod#(Samsung)pn50b550t2f

post 12 reece mentions mainboard? i class the logic board/tcon,the mainboard i class is the one with inputs ie tuner/hdmi scarts etc im only trying too make sure its the correct board saves you wasting time reece may see this thread soon and assure us which board needs to be replaced it maybe me wrong so dont order one just yet.

[rich-t]

Re: 42"Fluid plasma tv Mod#(Samsung)pn50b550t2f

Go to pages 5 and 6. Item 2

[rich-t]

Re: 42"Fluid plasma tv Mod#(Samsung)pn50b550t2f

Reecey said to order the main (logic) board.
link [TM].pdf&mfg=Philips-Magnavox

[vinceroger69]

Re: 42"Fluid plasma tv Mod#(Samsung)pn50b550t2f

well if you have ordered that board it maybe the wrong one but let someone else confirm, we was using the jumpers on that board to see which board was faulty which it points too the main board the one with the hdmi/tuner on hence peoples comments regarding the tuner but hey i could be totally wrong let someone else confirm which board you need to replace.