TC-P42S30 - Nothing...

[swamprat33]

Hello,

I have a Panasonic TC-P42S30 that will not do anything. No standby lights, no clicking, nothing.

Lightning hit the satellite dish and blew out both DTV receivers and our cable modem. The hit apparently came in over the coax cables, must have fried the DTV box and possibly went for the TV through the HDMI? We did have several circuits in the house blown, but PS3, Xbox and other devices in the same power strip are ok.

I opened the back of the set and checked the 5 fuses on the power supply board and they all show in tact using a ohm meter. I am getting voltage to the board at the AC plug and P9.

I would appreciate a couple of troubleshooting steps to take to make sure it is the power board. I did some preliminary checking and it seems that shopjimmy.com looks to be a preferred spot to buy boards, but they are out. So is encompass.com. Anyone else have any suggestions? Any luck repairing the power boards? I know Panasonic says no repair, replace.

Thanks in advance for your help!

[selldoor]

Re: TC-P42S30 - Nothing...

If the hit was via the hdmi cable it is likely the main board processor has been scrambled.
I dont have a lot of time now - others may help but perhaps type lightning into the search above and you will get information.
Pictures will probably be required and you should search for a service manual.
Very carefully test the voltage on the main BIG cap on the power supply -meter on VDC 600 and also test to see if there are any lower ( meter on 200vdc) voltages on the connector to the main board
which should be connected for the test.

[swamprat33]

Re: TC-P42S30 - Nothing...

Thanks for the reply.

I downloaded a service manual, but it says the power board is not serviceable so there is nothing more than a block diagram. I'm new at this, but have a basic understanding electronics repair.

I'm with you that the main board could have taken a hit, but since I can not even get any indication of power, I wanted to start there first and see what happens.

I have taken a picture of the power board. There are 2 very large capacitors. I assume that I need to take the board off the set to get to the back of them?

I tested for AC voltage at the bottom plug off to the left where the AC comes in. I also tested for voltage at the top left and right plugs that go to other boards and I am not getting any voltage there. I disconnected the plugs to all boards and still get nothing to indicate power (no LED blinking, no relay clicking, nothing, nada, zip).

Thanks!

[swamprat33]

Re: TC-P42S30 - Nothing...

Pic would help...

[martino]

Re: TC-P42S30 - Nothing...

Do you get the 5volt standby on the connector going to the mainboard(right bottom)
You will not see power on the top left and right plugs(Va and Vs) going to the Y and X boards till the power supply is being turned on by the mainboard.
To measure the 5volt standby,put meter on 20volt DC,black probe on chassis of TV and red probe on the correct pin at connector,legend is printed byside it.

[swamprat33]

Re: TC-P42S30 - Nothing...

I do not have any voltage on that connector at all on any pin. Black on chassis and red touching each wire on the connector.

I also checked for voltage on both of the large caps, putting the black lead on the Neutral point and checking both sides of both caps. Nothing greater than 2 VAC.

Started tracing the VAC in from the plug and got it to where the blue box is attached. Relay RL101 is open. So it is not being activated. Where to next? Visual inspection for damage, burn marks or bad caps reveals nothing.

Thanks!

[tw2005]

Re: TC-P42S30 - Nothing...

In that diagram, above the blue box there is a fusible resistor. The mains passes through that and then down to produce 5v stdby. Check either side of that for voltage . if one side shows mains and the other nil then that is blown.

[swamprat33]

Re: TC-P42S30 - Nothing...

Getting proper voltage on both sides of that. In fact, I get line voltage at D309 on the same side as the relay. On the other side of D309, I am getting funny readings.

Here is the whole block diagram.

Thanks.

[swamprat33]

Re: TC-P42S30 - Nothing...

Any way to confirm the power board is bad? I can't find a replacement in stock anywhere. I would like to fix. Thanks.

[martino]

Re: TC-P42S30 - Nothing...

I have a powerboard here
Comes out of a 50",board number is NOAE6KK00005
Lay out looks identical,can any one here confirm those are the same voltage out put?
Swamprat33,inbox me if interested.

[tw2005]

Re: TC-P42S30 - Nothing...

http://www.ebay.com.au/itm/PANASONIC...item2593bd94c0

http://www.ebay.com.au/itm/Panasonic...item3f3b803a6e

http://www.moduslinkptstvboards.com/...PKUUS&x=15&y=3


I have virtually nil exposure to fixing panasonic PSUs so I'm unsure except without schematics it makes it hard. I'd expect to at least see 5v stb once ac was applied to it.

I have a 2010 PSU bare, out of the chassis and I just connected mains to it and it produces 5V stdby on it's own with no other board connected to it.

maybe if you can take a hi res shot of the PSu top and bottom, maybe someone can work the cct out.

https://www.badcaps.net/forum/showthread.php?t=39740

[martino]

Re: TC-P42S30 - Nothing...

according to shopjimmy, the NOAE6KK00001 is for a 42" and the NOAE6KK00005 for 46" and 50".
I've been looking at my board and compare it with swamprats and they look identical.
No clue what the difference would be,beefier on the VS/Va components?

[tw2005]

Re: TC-P42S30 - Nothing...

according to shopjimmy, the NOAE6KK00001 is for a 42" and the NOAE6KK00005 for 46" and 50".
I've been looking at my board and compare it with swamprats and they look identical.
No clue what the difference would be,beefier on the VS/Va components?

Possibly, unsure about voltages though and the manuals don't tell you in the later models. Would probably work if the layout is the same and same connectors but without knowing what voltages are set could be tricky. There are 2 trimpots set and sealed so they could be adjusted vda though is one to be careful of.

don't get good schematics in the later model either and i think no info on the PSU.

[swamprat33]

Re: TC-P42S30 - Nothing...

Really beginning to wonder if it is worth the money to replace boards. A PS3 that was connected to the TV via HDMI is also damaged. It powers on but I can't get a picture. Since the strike hit the dish, it took out the DTV box and looks to have hit the TV via the HDMI cable. It must have also gone out the HDMI to the PS3 and damaged that. I had an old Xbox connected via composite cables and it is working fine. Does this sound like a credible theory? Wondering if that main board is toast as well now.

[tw2005]

Re: TC-P42S30 - Nothing...

Really beginning to wonder if it is worth the money to replace boards. A PS3 that was connected to the TV via HDMI is also damaged. It powers on but I can't get a picture. Since the strike hit the dish, it took out the DTV box and looks to have hit the TV via the HDMI cable. It must have also gone out the HDMI to the PS3 and damaged that. I had an old Xbox connected via composite cables and it is working fine. Does this sound like a credible theory? Wondering if that main board is toast as well now.

Very much so. yes you could be looking at more than one board. where I am it's lightning city in the wet season.

had a strike very close to the house. lost 2 lights, 2 fans, antenna amplifier, hdmi on DTV box, associated port on the TV.

i'd say my antenna was the cause, I had the set top box and TV connected to a UPS.
Lucky for me just the hdmi port was toast not the whole A board.

[tom66]

Re: TC-P42S30 - Nothing...

You can usually use 46"/50" board in a 42" set. You have to watch out for connector pin outs and mechanical dimensions, though.