Panasonic TCP42S30 SN Board reflow-Help out a noob!

**WHaThEFLuX** · 03-03-2015, 02:10 AM

Re: Panasonic TCP42S30 SN Board reflow-Help out a noob!

Just tried to power on with the room pitch black, absolutely no detectable light coming from the panel at any point.

I also tried checking for continuity at SS61 and SS33 as instructed by the flowchart, they both checked out ok.

**tw2005** · 03-03-2015, 02:20 AM

Re: Panasonic TCP42S30 SN Board reflow-Help out a noob!

not sure what to make of it unless the panel has a small fracture and somehow not shorting the boards. photos

**WHaThEFLuX** · 03-03-2015, 02:31 AM

Re: Panasonic TCP42S30 SN Board reflow-Help out a noob!

Idk how you'd ever be able to tell from the photos, but the small chip in the center of the light is the only visible blemish on the panel.

**WHaThEFLuX** · 03-03-2015, 02:36 AM

Re: Panasonic TCP42S30 SN Board reflow-Help out a noob!

I read a few threads where members have made it to this point, but it was never clear as to how they remedied their sets, I know a few of them just threw replacement boards in until it was fixed......could it be the A board? I checked IC5000 and all the voltages are there, I'm really stumped with this one.

**tw2005** · 03-03-2015, 02:40 AM

Re: Panasonic TCP42S30 SN Board reflow-Help out a noob!

you're right, i can't . more interested in the rear but a chipped panel maybe the issue. as far as i know there is no protective filter glass on these so it's conceivable there's a fracture and gas has leaked.

more opinions would help. do you have a jewellers loupe to have a real good look at that chip, maybe a pinhole there?

**WHaThEFLuX** · 03-03-2015, 02:45 AM

Re: Panasonic TCP42S30 SN Board reflow-Help out a noob!

Funny you mention that, I just got one in a resistor kit.....the chip appears to be superficial but I'll see what I can do.

I'd love to get some more opinions, you're the only one who seems to have any interest, I wouldn't even be this far if it wasn't for you!

If there's anything else you like to see on the back just let me know, maybe there's a voltage diagnostic I missed.

**tw2005** · 03-03-2015, 02:47 AM

Re: Panasonic TCP42S30 SN Board reflow-Help out a noob!

with photos you can go advanced and the upload using manage attachments

**WHaThEFLuX** · 03-03-2015, 02:54 AM

Re: Panasonic TCP42S30 SN Board reflow-Help out a noob!

Attached Files

**tw2005** · 03-03-2015, 03:01 AM

Re: Panasonic TCP42S30 SN Board reflow-Help out a noob!

i'm a pessimist. I'm sure everyone's interested, i can't offer much more but i await the rear shots of the internals and cabling

**WHaThEFLuX** · 03-03-2015, 03:03 AM

Re: Panasonic TCP42S30 SN Board reflow-Help out a noob!

Internals and cabling? Can you be a little more specific, as in the panel ribbons or power connections?

**tw2005** · 03-03-2015, 03:10 AM

Re: Panasonic TCP42S30 SN Board reflow-Help out a noob!

Originally posted by WHaThEFLuX

Internals and cabling? Can you be a little more specific, as in the panel ribbons or power connections?

I want to see the rear with all the boards exposed, cabling etc. Everything would be nice

**WHaThEFLuX** · 03-03-2015, 03:11 AM

Re: Panasonic TCP42S30 SN Board reflow-Help out a noob!

Ok I'll give it a shot, anything in particular?

**WHaThEFLuX** · 03-03-2015, 03:14 AM

Re: Panasonic TCP42S30 SN Board reflow-Help out a noob!

By exposed do you mean both sides of the board or just as detailed as possible?

Or do you mean the rest of the SS board and the lower C board?

**tw2005** · 03-03-2015, 03:18 AM

Re: Panasonic TCP42S30 SN Board reflow-Help out a noob!

Originally posted by WHaThEFLuX

By exposed do you mean both sides of the board or just as detailed as possible?

I'm just looking to see if it's all connected right or something silly. If I knew what it was I'd tell you. I have no idea because if the light is on the font as per normal, the SN onboard LED is on green and I assume if you get close to the Sn and SS boards they both have a faint buzz then that leaves me thinking a-board or panel.

**WHaThEFLuX** · 03-03-2015, 03:25 AM

Re: Panasonic TCP42S30 SN Board reflow-Help out a noob!

They definitely both have the faint buzz, I've gone over all connections very carefully, the only boards I can't really get a good look at are the C board and the K board.......Is there anyway to troubleshoot the A board besides testing for voltage?

If everything was operating normally, wouldn't the power LED turn green? I apologize for all the questions, I'm just not one to give up until I've exhausted all options, and you're the most knowledgeable person on the subject, I'm just trying to cling to the possibility that it's not the panel.

**tw2005** · 03-03-2015, 03:39 AM

Re: Panasonic TCP42S30 SN Board reflow-Help out a noob!

Originally posted by WHaThEFLuX

They definitely both have the faint buzz, I've gone over all connections very carefully, the only boards I can't really get a good look at are the C board and the K board.......Is there anyway to troubleshoot the A board besides testing for voltage?

If everything was operating normally, wouldn't the power LED turn green? I apologize for all the questions, I'm just not one to give up until I've exhausted all options, and you're the most knowledgeable person on the subject, I'm just trying to cling to the possibility that it's not the panel.

No, in the US the LED is only Red, ours goes green when active and red in standby and red blinking with shutdown on error.

don't know of any way except if you had a remote and had full control, maybe hook an antenna up and see if it has channels stored and sound, there a video out you could hook up to an external monitor or another TV to see if there any activity, will not show pop up menus though from that .

maybe keep an eye out for another broken 42S30 with a good screen.

I'll leave it at that , for someone to come up with some ideas. Sounds like you repaired the SN ok, bit of a bummer though.

**tom66** · 03-03-2015, 03:41 AM

Re: Panasonic TCP42S30 SN Board reflow-Help out a noob!

@flux, would you be able to borrow a scope/CRO for a quick test of SN/SS board output?

**WHaThEFLuX** · 03-03-2015, 03:46 AM

Re: Panasonic TCP42S30 SN Board reflow-Help out a noob!

Ahh, the great tom66, welcome. You had some really good input in other Panasonic Plasma threads, thanks for joining. Where would one acquire such a device?

**WHaThEFLuX** · 03-03-2015, 03:49 AM

Re: Panasonic TCP42S30 SN Board reflow-Help out a noob!

tw, I'll try to source a remote and see if I can get into service mode, you said any newer panasonic remote will do the trick? Also, you think I should try to hook up some kind of video out and see if anything happens? Wouldn't there be a Viera "splash screen" that displays even with nothing attached?

**tom66** · 03-03-2015, 03:49 AM

Re: Panasonic TCP42S30 SN Board reflow-Help out a noob!

Originally posted by WHaThEFLuX

Ahh, the great tom66, welcome. You had some really good input in other Panasonic Plasma threads, thanks for joining. Where would one acquire such a device?

Maybe you have a friend or workplace that will let you borrow it? You can buy used ones on eBay from ~$50 upwards.

Panasonic TCP42S30 SN Board reflow-Help out a noob!

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