Panasonic TC-P42S2

[heavymachines]

Hi all been some time since i needed some help been doing pretty good on my own however this set has me miffed atm. OK to get started on the issue with this set it started out as no power on nothing no signs of life no response from power button, so i ordered A board and now i get power on and the panel indeed energizes no menu or a picture it seems to go to service mode but you can't see it on panel i would have to unplug tv to get it to get out of service mode.



have both the service manual and troubleshooting manual for this set i think the problem is still in A board, could not find exact replacement for TNPH0831 (1) [A]

so i ended up with TNPH0831(3)[A] as closest replacement and it is a panasonic re-certified replacement A board... any light on this would be great since i am stuck atm.....

also according to the owner it has some sort of surge however i am finding out these sets have a lot of A board issues and the a board is very pricey want to go more in depth before i send this A board back .

[heavymachines]

Re: Panasonic TC-P42S2

any ideas bump?


no burns no bad caps i believe everything else is fine, no shorts that i can find, will post pic's but don't think it is necessary since manuals are prevalent for this set, however i still have a bit to learn about schematics, and this set is probably the most tricky to figure out......

[heavymachines]

Re: Panasonic TC-P42S2

service manual and training manual... and panel sticker says nothing of vs and va voltages and no labels on any connectors so yeah its fun, but some help with schematic translation would be awesome......

[heavymachines]

Re: Panasonic TC-P42S2

service manual can be had here upload being silly for some odd reason so here is the link

[tom66]

Re: Panasonic TC-P42S2

A glowing panel with no image is often a sign of a bad A board, especially if only the service menu works.

[tw2005]

Re: Panasonic TC-P42S2

Deleted

I think there's more to the revision of the main board than what you've posted. You can have identical board assemblies but different config and parts used on it depending on the model.

Was the board you replaced from a 42" model?

[heavymachines]

Re: Panasonic TC-P42S2

A glowing panel with no image is often a sign of a bad A board, especially if only the service menu works.

well to be more descriptive it seems to be able to go into service mode however it does not show on screen it just unable to do anything once in service mode have to unplug it and plug her back in to get power button to work again....

[heavymachines]

Re: Panasonic TC-P42S2

Deleted

I think there's more to the revision of the main board than what you've posted. You can have identical board assemblies but different config and parts used on it depending on the model.

Was the board you replaced from a 42" model?

well according to the listing it is for a 42 inch Panasonic compatible with certain models this one being one of them, however i think you may be correct i may have a board that is not compatible, finding the exact board same revision i just have no luck finding.... the 2 boards look identical except a connector it does not use and its revision new one is revision 3 and original is rev 1 now i suppose there may be a secret way to change firmware however can't see nothing on screen to do it lol.. looks like i may need to send this bad boy back eh?

[tw2005]

Re: Panasonic TC-P42S2

well according to the listing it is for a 42 inch Panasonic compatible with certain models this one being one of them, however i think you may be correct i may have a board that is not compatible, finding the exact board same revision i just have no luck finding.... the 2 boards look identical except a connector it does not use and its revision new one is revision 3 and original is rev 1 now i suppose there may be a secret way to change firmware however can't see nothing on screen to do it lol.. looks like i may need to send this bad boy back eh?

I had a look at SJ website and there are a lot of different versions of TNPH0831. I don't believe the 2 or 3 is what to look for. There is a suffix template on the board and the rev is determined by the placement of a series of jumpers.

If you post up some hi res shots of both boards it may reveal some clues of what you've got or check out SJ.

These are the revisions on SJ



TNPH0831 42S2
TNPH0831AB 46S2
TNPH0831AC 50S2,50C2,P5032C
TNPH0831AD 54S2
TNPH0831AE 58S2
TNPH0831AF 65S2
TNPH0831AG 42U2
TNPH0831AJ 50U2
TNPH0831AR 42PX24
TNPH0831AT 42C2
TNPH0831AU 46C2
TNPH0831AV 50C2

[heavymachines]

Re: Panasonic TC-P42S2

okay sorry been super busy however here is some pic's of the boards i cannot find these other numbers other then the ones in pic perhaps i am blind lol...

[heavymachines]

Re: Panasonic TC-P42S2

I had a look at SJ website and there are a lot of different versions of TNPH0831. I don't believe the 2 or 3 is what to look for. There is a suffix template on the board and the rev is determined by the placement of a series of jumpers.

If you post up some hi res shots of both boards it may reveal some clues of what you've got or check out SJ.

These are the revisions on SJ



TNPH0831 42S2
TNPH0831AB 46S2
TNPH0831AC 50S2,50C2,P5032C
TNPH0831AD 54S2
TNPH0831AE 58S2
TNPH0831AF 65S2
TNPH0831AG 42U2
TNPH0831AJ 50U2
TNPH0831AR 42PX24
TNPH0831AT 42C2
TNPH0831AU 46C2
TNPH0831AV 50C2

don't see any jumpers , having tough time telling what revision i have, i see the template for it but interpreting it is not very clear ... and both templates have same markings as far as i can tell if need more pics i will upload em...


suffix both look like it's marked as AB....

[tw2005]

Re: Panasonic TC-P42S2

From what I can make out , neither had the jumpers there and that would make it no suffix which SJ had listed for your model which was the picture I posted from their site. I don't have any more clues at this stage.

[heavymachines]

Re: Panasonic TC-P42S2

well that sucks... further more shop jimmy is out of stock and i am avoiding ebay get nothing but garbage from there seems like and i paid way too mch for this board that is a very expensive paperweight, could i be have another issue other then main board ? is was a surge that took it out, and this is the listing of the "new" A board which is clearly refurbished by Panasonic according to the box it came in here is listing for that http://cgi.ebay.com/ws/eBayISAPI.dll...=1119421679017 so looks like i burnt on this one i am out of ideas myself.....

[tw2005]

Re: Panasonic TC-P42S2

The only 2 thoughts I'm having are either the A-board is suspect again or as you said it was hit by a surge so that obviously reached the A board so could have travelled also to either the C buffer boards or SC20 at the SC board via the ribbon cables .

what is interesting is the fact you described what sounds like a TV that started normally with a panel that is energised but no image.

I have created this very scenario working on my Sc boards but I had sound because the TV had been tuned and it was a working Tv that I was using to test my boards so made it obvious what board caused it.

Anyway, I was messing with one of the tiny octal buffer ICs marking C541 which was faulty. I was using scavanged parts but one gave me SOS7, next one everything was normal except I only had a grey primed panel but no image.

Once I got a good chip in there it was back to working.

It's a possibilty?

[heavymachines]

Re: Panasonic TC-P42S2

The only 2 thoughts I'm having are either the A-board is suspect again or as you said it was hit by a surge so that obviously reached the A board so could have travelled also to either the C buffer boards or SC20 at the SC board via the ribbon cables .

what is interesting is the fact you described what sounds like a TV that started normally with a panel that is energised but no image.

I have created this very scenario working on my Sc boards but I had sound because the TV had been tuned and it was a working Tv that I was using to test my boards so made it obvious what board caused it.

Anyway, I was messing with one of the tiny octal buffer ICs marking C541 which was faulty. I was using scavanged parts but one gave me SOS7, next one everything was normal except I only had a grey primed panel but no image.

Once I got a good chip in there it was back to working.

It's a possibilty?

will look into that,,, will report back...

[Shawn5005]

Re: Panasonic TC-P42S2

Do you still have the TNPH0831 3A Board?

[SlickClick]

Re: Panasonic TC-P42S2

just picked one of these up when I got it; it had 6 blink code, opened up found SC board power & ribbon off, reconnected then got a 7 blink code...
Began to disconnect finally got unit to power up w/ no image w/ the SC to A-board ribbon off and the lower buffer ribbon off...
I'm leaning towards bad A-board but could it be a lower buffer & SC board set both bad..? I dont know how to confirm, downloading manuals now too; thanks for those btw...

[tw2005]

Re: Panasonic TC-P42S2

just picked one of these up when I got it; it had 6 blink code, opened up found SC board power & ribbon off, reconnected then got a 7 blink code...
Began to disconnect finally got unit to power up w/ no image w/ the SC to A-board ribbon off and the lower buffer ribbon off...
I'm leaning towards bad A-board but could it be a lower buffer & SC board set both bad..? I dont know how to confirm, downloading manuals now too; thanks for those btw...

will be most likely shorted TNPA5105AD SC board and or SD/SU boards. check resistance across sc2 and also find Q661 on the SC and see if that's shorted

[h82loseejr]

Re: Panasonic TC-P42S2

did you ever get this working i need the a board if you were interested in getting rid of it

[kcblack]

Re: Panasonic TC-P42S2

Hello, New Here
Have 2010 Panasonic TC-P42S2 plasma with the 10 blinking lights. Cannot bring up a menu from the TV or HD digital cable box. When first turning the set on it clicks like normal and then after a few seconds clicks again. Black screen with blinking power light.

Took off back panel and disconnected the board on the left side. Turned the power on and now have 6 blinking lights. This suggests the SC board is bad. Is there a chance it could be the SS board and how do i test to see if the board is malfunctioning?

Thanks for you assistance,
K