PANASONIC plasma TH-P42X20A, SOS4,1,10,6,8

[flocko]

Re: PANASONIC plasma TH-P42X20A, SOS4,1,10,6,8

I have just got round to refitting the SN +SS boards after replaceing all the parts as listed
TNPA5066
Q451 DG502
D481 RFU20
Q661 RJP63F
D451 ES 1G
Q701 MMBTA92 (7E W)
Q702 2PD601ART (3W)
IC773 5N74AHCIG14DBVR
Q818 2SK3018

TNPA5072
RJP30E4 X4
M81735FP I replaced this with a M81737FP as had one to hand
with the boards fitted the set powers up solid green light, and solid green on the SN,but the not so good news is the on screen image see photo it could be the driver M81737FP that I have fitted but not sure? let me know what you think, anyway I am getting there Thanks Flocko

[tw2005]

Re: PANASONIC plasma TH-P42X20A, SOS4,1,10,6,8

If you like pink, looks great!

I would think using that FET driver would be an issue. was there anything obvious wrong with the M81735?

I don't think they actually blow, I replaced mine but I found nothing obvious with it.

Any scrap SS boards at all from 2009/10 in your pile?

[tw2005]

Re: PANASONIC plasma TH-P42X20A, SOS4,1,10,6,8

First thing I would do is look at the pinouts, pin 11 and pin 2 especially pin 11 since it is Vcc on the one you put in 737 ,and NC / grounded on the 735

[Hombre]

Re: PANASONIC plasma TH-P42X20A, SOS4,1,10,6,8

I think it's not good substitute, at least as far as i can see it from datasheet, altough i'm a newb so might be wrong

[tw2005]

Re: PANASONIC plasma TH-P42X20A, SOS4,1,10,6,8

Might find that driver on older SC boards too?

[tw2005]

Re: PANASONIC plasma TH-P42X20A, SOS4,1,10,6,8

I think it's not good substitute, at least as far as i can see it from datasheet, altough i'm a newb so might be wrong

Not even a substitute really, different IC

[Hombre]

Re: PANASONIC plasma TH-P42X20A, SOS4,1,10,6,8

Probably best thing to do is to order new M81735FP, and install it.
Or he could try with the old one, but i know i wouldn't do it

[flocko]

Re: PANASONIC plasma TH-P42X20A, SOS4,1,10,6,8

No I just thought as I had one change it, I have tried to get data up on them but had no luck and it was only after I fitted it that I realised it was a 7 not 5,i had it in my box of bits left over from repairing a SC board I tend to buy more when it comes to these small SMD parts as they fly off in to the unknown and get lost forever, I have a TNPA5082 that has a 5 and a 7 on it I will pull that off, I have looked but no one has one. I hope that's what the problem is anyway time will tell. Thanks for all your help Flocko

[tw2005]

Re: PANASONIC plasma TH-P42X20A, SOS4,1,10,6,8

No I just thought as I had one change it, I have tried to get data up on them but had no luck and it was only after I fitted it that I realised it was a 7 not 5,i had it in my box of bits left over from repairing a SC board I tend to buy more when it comes to these small SMD parts as they fly off in to the unknown and get lost forever, I have a TNPA5082 that has a 5 and a 7 on it I will pull that off, I have looked but no one has one. I hope that's what the problem is anyway time will tell. Thanks for all your help Flocko

That's where I got mine off a 5082, you could compare pin for pin and get an idea if the old one was bad, that's what I did but played it safe. Nice work with the SN, looks straight forward although I stuffed my attempt.

[tw2005]

Re: PANASONIC plasma TH-P42X20A, SOS4,1,10,6,8

might want to edit Q616 to 661, if you can.

[tw2005]

Re: PANASONIC plasma TH-P42X20A, SOS4,1,10,6,8

UTSOURCE will have them , or quite a few chinese suppliers I expect.

[flocko]

Re: PANASONIC plasma TH-P42X20A, SOS4,1,10,6,8

Well I think we both need to go to the opticians you with your lost resistor and me for not seeing the wrong number on the driver, all will be fine in the end and its only time and I hope we still have some of that to spare . Thanks again one and all Flocko

[tw2005]

Re: PANASONIC plasma TH-P42X20A, SOS4,1,10,6,8

Well I think we both need to go to the opticians you with your lost resistor and me for not seeing the wrong number on the driver, all will be fine in the end and its only time and I hope we still have some of that to spare . Thanks again one and all Flocko

So have you swapped it and it's fixed or still in progress?

[flocko]

Re: PANASONIC plasma TH-P42X20A, SOS4,1,10,6,8

Just put the old one back as I used Q- chip to get it of so not had that much heat though it, but still have a dim hard to see screen do you think it could be the buffer chip? will take a photo but hard to see it as so dim Flocko

[tom66]

Re: PANASONIC plasma TH-P42X20A, SOS4,1,10,6,8

Flocko do you have an oscilloscope available?

[flocko]

Re: PANASONIC plasma TH-P42X20A, SOS4,1,10,6,8

No mate just tried to take a photo but so dark wont come out, I will pull the driver chip again solder could have got under it Flocko

[tw2005]

Re: PANASONIC plasma TH-P42X20A, SOS4,1,10,6,8

Just put the old one back as I used Q- chip to get it of so not had that much heat though it, but still have a dim hard to see screen do you think it could be the buffer chip? will take a photo but hard to see it as so dim Flocko

At this stage, I'm out of ideas for the time being.

[flocko]

Re: PANASONIC plasma TH-P42X20A, SOS4,1,10,6,8

just changed the driver again for the one on the 5082 just waiting for it to dry off after cleaning the flux off the board. getting fast at changing these now with all this practice Flocko

[flocko]

Re: PANASONIC plasma TH-P42X20A, SOS4,1,10,6,8

Fixed it.Thanks for all your help with this repair big well done all round Flocko

[Hombre]

Re: PANASONIC plasma TH-P42X20A, SOS4,1,10,6,8

Good job