TH-P50G15A - 6 Blinks- Bad TNPA4782

[Glitcher]

Re: TH-P50G15A - 6 Blinks- Bad TNPA4782

I usually use an exacto knife but being careful not to put too much pressure as not to cut the traces underneath. But that's only if I know it's definitely bad. Sometimes I end up wanting to put it back for some reason. I usually put a blob of solder of both ends and heat both ends with my iron until it finally loosens off

[tw2005]

Re: TH-P50G15A - 6 Blinks- Bad TNPA4782

Not much parts left for now. Probably need to order more. Might be hard to fix these since I don't have the panel anymore

yeah, that would be tricky for testing and you can't plug it in this model either as the Sc20 pinouts are different. You could plug in to a S20, (s2)

You'd need RJp63F3a, DG402RP x 2, 30F125 x 2, dg502LW x 2, 45G128 x 1, RFN25TM4SW or a 400v 20A fast rectifier, M81737FP, TC7SH14F, MMBTA92, 2PD601ART, 2sk3018 or 2n7002, RF071L4s or RF101L4s, TA78L05

I have done some with only 7 or 8 parts needed but above is fairly normal, CPH5524 would be handy but normally they seem ok,

[tw2005]

Re: TH-P50G15A - 6 Blinks- Bad TNPA4782

Here's another way to remove those M81737 Ics, use a precision set of cutters and carefully nip the legs against the casing. Desolder the remnants, use a quality braid like chem-wik to remove all solder , clean with IPA, get some flux or flux pen and prep the pads and legs, tack 2 corners to get it nicely in position and use fine solder and fine tip.

[Glitcher]

Re: TH-P50G15A - 6 Blinks- Bad TNPA4782

Not much parts left for now. Probably need to order more. Might be hard to fix these since I don't have the panel anymore

[tw2005]

Re: TH-P50G15A - 6 Blinks- Bad TNPA4782

Yep, and thanks for all the help! Maybe I should start fixing these three 5081 boards I have laying around.

Oh, you're kidding you have these laying around! You can fix those easy. How many parts do you have left over?

[Glitcher]

Re: TH-P50G15A - 6 Blinks- Bad TNPA4782

Yep, and thanks for all the help! Maybe I should start fixing these three 5081 boards I have laying around.

[tw2005]

Re: TH-P50G15A - 6 Blinks- Bad TNPA4782

Got into the service menu. I went into serv tool and held the return, the tv just resets and brings me back up to the main service menu.

looks like this set only had 5700 hours on it.

ok, thanks but normally it would restart and turn on like normal TV. maybe the setup is different. I was hoping the missed Pfet on mine may have been the cause of this minor issue.

You're going to finish this off properly and replace the FET?

Well we got there in the end, now find another and have another go

[tw2005]

Re: TH-P50G15A - 6 Blinks- Bad TNPA4782

TBH--The screws were not slack or any evidence of arcing, I pulled the board just to check.

No evidence the board has ever seen an Iron --or anything else. If it had been given to me as a brand-new part, I wouldn't have cause to say otherwise, Looks perfect!

Ive bunged it on the wall anyway--Got fed up with the Cruddy picture on that 4K LG LED set--HATE LCD pictures.....

I did'nt think you thought much of the panasonic plasmas either?

[Alastair E]

Re: TH-P50G15A - 6 Blinks- Bad TNPA4782

TBH--The screws were not slack or any evidence of arcing, I pulled the board just to check.

No evidence the board has ever seen an Iron --or anything else. If it had been given to me as a brand-new part, I wouldn't have cause to say otherwise, Looks perfect!

Ive bunged it on the wall anyway--Got fed up with the Cruddy picture on that 4K LG LED set--HATE LCD pictures.....

[Glitcher]

Re: TH-P50G15A - 6 Blinks- Bad TNPA4782

Got into the service menu. I went into serv tool and held the return, the tv just resets and brings me back up to the main service menu.

looks like this set only had 5700 hours on it.

[tw2005]

Re: TH-P50G15A - 6 Blinks- Bad TNPA4782

Ive just got one of these--a 50G10 with the same board. The set however--works, but the fault code list logged 4 SOS-7 and one SOS-4, and 13,600 odd hours.

Ive not been able to fault the set--Its run for some hours, but did remove/refit the SC and checked all mounting-screws for tightness....

Strange thing is--for a set with that hours--Its spotless inside, Looks like new, practically no dust or marks/evidence of work--Weird.....

Gawd--The SS and SC run Bloody HOT! Cant keep yer hand on any of the heatsinks after half-hours run....

never checked the SS but yes, it's amazing they don't burn up sooner! any evidence of the SC being reworked?

I'd be surprised if you found loose screws.

if you run these with no load i.e. just the P and A boards then it will go 4 blink eventually. Maybe after a minute for my V20.

See attached history for mine. Note 6 blink was original fault, the 4 is when I ran it with no sustain boards and the 7 was when things were'nt going well and I killed the buffers.

I never realised I had a 4 blink slip in there until I got this running

A working TV, how boring

[Alastair E]

Re: TH-P50G15A - 6 Blinks- Bad TNPA4782

Ive just got one of these--a 50G10 with the same board. The set however--works, but the fault code list logged 4 SOS-7 and one SOS-4, and 13,600 odd hours.

Ive not been able to fault the set--Its run for some hours, but did remove/refit the SC and checked all mounting-screws for tightness....

Strange thing is--for a set with that hours--Its spotless inside, Looks like new, practically no dust or marks/evidence of work--Weird.....

Gawd--The SS and SC run Bloody HOT! Cant keep yer hand on any of the heatsinks after half-hours run....

[tw2005]

Re: TH-P50G15A - 6 Blinks- Bad TNPA4782

I'd like to see you get results like this. By no means perfect.

[tw2005]

Re: TH-P50G15A - 6 Blinks- Bad TNPA4782

I had a feeling about the spare that I salvaged from another board and I remember you said that your ic563 survived so I assumed mine could of also and I replaced it back to the original.

How do you get into serv tool?

page 8-10 in the service manual TC-P50S1. Once you are done with srv-tool, press and hold the return button to force the TV to reset. let me know what happens.

[Glitcher]

Re: TH-P50G15A - 6 Blinks- Bad TNPA4782

I had a feeling about the spare that I salvaged from another board and I remember you said that your ic563 survived so I assumed mine could of also and I replaced it back to the original.

How do you get into serv tool?

[tw2005]

Re: TH-P50G15A - 6 Blinks- Bad TNPA4782

Progress!!! I decided to put back the original IC563 and finally it stays on! So it seems it does run without the Q604 FET.

Now I just need to make sure there are no problems with the buffers before I put them back on.

sounds good. Any particular reason you decided on 563?

I'd like you to try something once it's running. Go into serv tool and get the hours. then on the remote hold the return button to force the tv to reset and start again. I'm looking for it not to start and go 7 blinks. Turn off then turn on and see if it starts normal again.

[tom66]

Re: TH-P50G15A - 6 Blinks- Bad TNPA4782

Check from FGND (Vfg) to Vfo, should show about 120-160V operating. More, or negative, is bad and can kill the buffers.

[Glitcher]

Re: TH-P50G15A - 6 Blinks- Bad TNPA4782

Progress!!! I decided to put back the original IC563 and finally it stays on! So it seems it does run without the Q604 FET.

Now I just need to make sure there are no problems with the buffers before I put them back on.

[tw2005]

Re: TH-P50G15A - 6 Blinks- Bad TNPA4782

IC562 has the drive signals for both those fet drivers

[tw2005]

Re: TH-P50G15A - 6 Blinks- Bad TNPA4782

well it's all matching and thats from those IGBTs that produce the MID right throught to the drivers. I can only wonder now about ic561,562 how cleanly you've soldered those or whether there are any of those pins shorted because the drive signal come from those.

If you can get pictures as good as the last for them. Do you have a jewellers loupe or get really good look at the pins just in case?

1 am in 8m minutes that's my deadline, may not see your reply.