Panasonic TC-P60S30

[hokie1027]

Hello--I've got a Panasonic TC-P60S30 plasma that will not power on--no blinking lights; nothing. I replaced the power board, and the power button assembly. The old button was depressed and stuck, and I thought that maybe that was keeping the TV from powering on. With my limited skills with a digital volt meter, I know I've got 120-121V coming into the board from the plug. I did
get 5V DC on some hot points on the power board. It was suggested on another site to check resistance---so at P2 and P11 with the power cord unplugged, I'm only getting .6 ohms reading. I know that's very low--could I have a short somewhere keeping the TV from powering on ? Is there anyway to clearly identify which other board or area might be corrupted ?
Thank you for your help---

[tw2005]

Re: Panasonic TC-P60S30

Hello--I've got a Panasonic TC-P60S30 plasma that will not power on--no blinking lights; nothing. I replaced the power board, and the power button assembly. The old button was depressed and stuck, and I thought that maybe that was keeping the TV from powering on. With my limited skills with a digital volt meter, I know I've got 120-121V coming into the board from the plug. I did
get 5V DC on some hot points on the power board. It was suggested on another site to check resistance---so at P2 and P11 with the power cord unplugged, I'm only getting .6 ohms reading. I know that's very low--could I have a short somewhere keeping the TV from powering on ? Is there anyway to clearly identify which other board or area might be corrupted ?
Thank you for your help---

I think your 0.6 ohms is the answer. Not just low it's a short. SC board would be my guess. try disconnecting SC2 and SC20 and power on. If it comes to life i.e you see power and it starting but then goes SOS with blinks then Check resistance across SC2 (TPVSUS - gnd)

[hokie1027]

Re: Panasonic TC-P60S30

OK, thanks--I'll try that when I get home later today--
Does the tape connection at SC20 easily come off/upward ?
You think the short is in the SC board ?

[tw2005]

Re: Panasonic TC-P60S30

OK, thanks--I'll try that when I get home later today--
Does the tape connection at SC20 easily come off/upward ?
You think the short is in the SC board ?

S30 series seem to blow SC boards a bit from what i've read. I've got the generation before 2010 and they do the same, usually shorts SC2 and the PSu triggers SOS4 but yours I think can cause what you have. One way to find out and that's either test SC2 for short cct although you said p2/p1 is 0.6 ohms which means vsus is dead short. SC would be the first board i'd check.

the Sc20 has a latch which you lever up ( the black bit) you should work it out when you see it. only need a finger and a small amount(virtually none ) effort to raise. The the ribbon should just fall out as you lift it a little. treat it with care.

Don't reconnect SC2 straight away as 200v will be sitting there for a while , give it 5 mins.

If it all works out, next step would be to check the Sd/Su boards and see if they are ok before you install a good board. Not sure how hard these boards are to get 2nd hand but there are repair kits but I would suggest. a board repair at Moduslink PTS .

[tw2005]

Re: Panasonic TC-P60S30

SJ has 156 of these boards at $85

http://www.shopjimmy.com/panasonic-t...u-sc-board.htm

repair

http://www.moduslinkptstvboards.com/...sc-tnpa5399ab/

I'd go the new board from SJ or google a bit and see what else but they'd be pulled from brand new Tvs damaged in transit.

I'd keep the old board in case these run outand if you still have the Tv need a core for repair.

[tw2005]

Re: Panasonic TC-P60S30

seems like they are plentiful

$20 , seems awfully cheap

http://www.ebay.com/itm/145-SC-BOARD...item19f3a8ed17

[tw2005]

Re: Panasonic TC-P60S30

Check your board, should be TNPA5399AB, (AB) is the revision as they have different revisions to suit different models and sized screens. check with those Ebay sellers what revision they have if they don't mention it

[tw2005]

Re: Panasonic TC-P60S30

Amazing how supply and demand works, worth buying for the components to fix other boards if you were stuck

$20
http://www.ebay.com/itm/PANASONIC-TC...item3a8cefd979

Unreal, my board is very hard to get and expensive. I'd even consider getting a spare if you are going to keep it for years because you never know if they'll be around in a year or 2 if they blow regularly.

[hokie1027]

Re: Panasonic TC-P60S30

Thanks, TW--all good stuff--
I'll try your suggestions later--

[hokie1027]

Re: Panasonic TC-P60S30

If it powers on, what should the resistance be at SC20 ?
And if it doesn't try to power up when SC2 and SC20 is disconnected ?
Sorry, more questions--

[tw2005]

Re: Panasonic TC-P60S30

If it powers on, what should the resistance be at SC20 ?
And if it doesn't try to power up when SC2 and SC20 is disconnected ?
Sorry, more questions--

I don't know. If you get activity again withe SC removed then that was the issue.

I'll worry about the what ifs when i see some results come back.

[hokie1027]

Re: Panasonic TC-P60S30

Ok, I disconnected the SC board and tried to power on the TV--
There was no sound or start-up. I measured resistance at the SC board, and other connections at .4-.5 ohms. Obviously, as you say, there's a short somewhere. Can you suggest my next move--Thanks for your help.

[tw2005]

Re: Panasonic TC-P60S30

I'm not ure now, could be A-board. i'm curious how you're checking for shorts and where especially when you say SC board and other connections. can you be more specific on the test points and what probe is connected to what .

If you've got no standby LED lit, might want to plug the TV in and check for 5V standby at connector A6, pin6

When you first plug the TV in are there any relay clicks?

[hokie1027]

Re: Panasonic TC-P60S30

Thanks for the reply--
Yes, with the meter on a DC setting, I checked A6 yesterday--
I got a 5V reading. As far as resistance, and after removing the power cord,
I've been getting a drop to .4-.6 ohms on the meter. I've set it to a low (200) level, touch the black lead to a board screw, and touch the red lead to the connection opposite the brown wire at SC2, P2, P11 and SS11. Unless I'm setting the meter improperly, I just don't know why it won't fire up--

[tw2005]

Re: Panasonic TC-P60S30

So you are measuring at the same point the brown wire connects too? Is that correct?

Brown wire is earth, gnd-gnd would = 0 ohms or the resistance of the test leads which is usually around 0.2, 0.3 ohms on my fluke.

[hokie1027]

Re: Panasonic TC-P60S30

Yes, I might be touching two grounds at the same time---Damn,
let's refresh---I should be touching opposite the white wire ?
I'll have to start with a new process and new readings--I feel like an idiot.

[tw2005]

Re: Panasonic TC-P60S30

for ST30 but may help

[tw2005]

Re: Panasonic TC-P60S30

TRY page 85, I'm thinking this is going to be A board.

What happened when this failed or did you get this Tv broken?

[hokie1027]

Re: Panasonic TC-P60S30

Thank you--
What is the difference between the S and ST model ?

[tw2005]

Re: Panasonic TC-P60S30

ST is 3D model, can you look at your A board, there's a Suffix legend ranging from no suffix through to BA. There are a series of jumpers soldered to indicate what rev using that table and there position.

zoom in on this to get an idea.

http://www.shopjimmy.com/media/catal...guus-top_3.jpg

SJ suggests AD,AT,AV suit 60S30

I've found an AT board at a good price but they have it as TNPH0914At from 50s30.

So either they have the wrong rev listed or the model is wrong.
hopefully the rev is correct in which case it should suit.

This is assuming the flow chart leads us to A board.

Price is that good it's worth a shot.