Panasonic th-p42x10z

[lambchopsnz]

Hi people,
I got this panasonic Th-P42X10Z (a New Zealand model i believe) for nothing but it has the 6 led blink fault following a flow chart i found i bought a replacement ss board from the US im in New Zealand.
Having installed the new board i was getting the same result 6 blinks so i found a local supplier and bought a sc su and sd boards and installed them and still got the same result 6 blinks so after further reading i find the 6 blinks can also be caused by an A board fault is this correct and should i replace this board as well or could it be something worse?
The guy i bought the 3 boards off is going to take them back and get them tested for me.
Any other suggestions appreciated.
Cheers
Nick

[tw2005]

Re: Panasonic th-p42x10z

Going on the previous information that was supplied in the other thread, if the code changed to 8 you'd think the A board was ok. If you disconnected all the leads from the Sc,SS, remove P35, the white ribbons at the A board and turned it on it should turn on with no error and you could check the voltages at the P board.

Only run it for 30secs and turn it off.

I can't remember if that works on this one or not. I think it does. I have x14 which is same TV really just a special line model I think either Big W or Kmart sold back in the day.

What is difficult is knowing whether the parts you got were good or not.

Not a model I'm greatly familiar with and I have the next series x20 which had me chasing my tail with corrosion on the white ribbons in various boards causing errors.

Don't want to suggest A board as it's a gamble and you'd expect expensive.

[lambchopsnz]

Re: Panasonic th-p42x10z

Thanks for your reply yes when i removed all the ribbon cables from the A board the led would stay green.. which is why i was wondering if it could be that.. i can get one for about $50 if the guy has one.

[tw2005]

Re: Panasonic th-p42x10z

Thanks for your reply yes when i removed all the ribbon cables from the A board the led would stay green.. which is why i was wondering if it could be that.. i can get one for about $50 if the guy has one.

I don't think it's that board then. It changes to 8 when it should, and it stays on when you did what I asked which also is normal.

It could be that it's just the SC and the Sc you got was also bad.

I guess if there was a dead set way of finding a fault on your old SC then at least that would be evidence.

The guides are not great for that series.

I'm still trying to understand how originally you followed a guide that lead to the SS for 6 blinks.

Have you got a multimeter and do you know how check for shorts?

[tw2005]

Re: Panasonic th-p42x10z

Have you inspected both ends of the ribbons that go from the A-board to the c1 and C2 boards for corrosion?

[lambchopsnz]

Re: Panasonic th-p42x10z

I followed this guide http://www.docfoc.com/2009-pdp-troub...07cp-rev091117 slide 42 i know its for a TC-p42x1 but i couldn't find anything relating to the TH-p42x10z and this was the closest having the same set out of boards, or is this completely wrong? Yes I do have a multimeter just not sure what to check or what the correct readings should be.. I haven't checked those ribbon cables but I will. I am also sending the sc and buffer boards back to be checked so will see what happens there. I'm also wondering how the ribbon cables would get corrosion on them if they plugged in and will cleaning them with alcohol wipes help?

[tw2005]

Re: Panasonic th-p42x10z

I followed this guide http://www.docfoc.com/2009-pdp-troub...07cp-rev091117 slide 42 i know its for a TC-p42x1 but i couldn't find anything relating to the TH-p42x10z and this was the closest having the same set out of boards, or is this completely wrong? Yes I do have a multimeter just not sure what to check or what the correct readings should be.. I haven't checked those ribbon cables but I will. I am also sending the sc and buffer boards back to be checked so will see what happens there. I'm also wondering how the ribbon cables would get corrosion on them if they plugged in and will cleaning them with alcohol wipes help?

I don't know if it's wrong but I'm tempted to take the back off mine and try a few of those steps. I think because these have the SS and SC interconnected that's where it get complicated. This one of mine had a 7 blink and I found nothing shorted n the SC but the SC was the issue. Part of the cct that produces Vad was just out of spec.

If you know how to measure a shorted component then try all the heatsinked transistors labelled with a "Q" and see if any are short.

[tw2005]

Re: Panasonic th-p42x10z

On the SC I should have said.

[lambchopsnz]

Re: Panasonic th-p42x10z

cheers thanks for the ideas ill try them when i get time. Ok i was wondering about the correct voltage setting having replaced the ss board although i was believing i would at least get a picture and the voltage could be adjusted afterwards or is that wrong also because that will be my next problem how to adjust the voltage and where to test it and can this be done with just a multimeter or do you need special equipment?
cheers
Nick

[tw2005]

Re: Panasonic th-p42x10z

cheers thanks for the ideas ill try them when i get time. Ok i was wondering about the correct voltage setting having replaced the ss board although i was believing i would at least get a picture and the voltage could be adjusted afterwards or is that wrong also because that will be my next problem how to adjust the voltage and where to test it and can this be done with just a multimeter or do you need special equipment?
cheers
Nick

if checking vsus, DC voltage and looking at about 200volts I think there is a panel sticker in the 2009 models so should be on that and you'd measure across the p11 or ss11 but get a manual or that guide may say where. Any 2009 HD 42" model would do for test points, say x1,x10, c1
I don't think you need to adjust anything replacing SC or SS boards

[tw2005]

Re: Panasonic th-p42x10z

I was having a re-read of my x20 which is the next gen but it's HD and is similar in that the SS and Sn are connected. I was battling numerous faults and corrosion but I did find a failed chip on the c2 board which may contribute to a 6 blink code. I f you read it I even start thinking A board using the same fault theory in that 2009 guide , but could make no sense of that conclusion.

https://www.badcaps.net/forum/showth...light=6+blinks

[tw2005]

Re: Panasonic th-p42x10z

looking at that guide, A31 or A32 removed can trigger 6 blink, both those are the c1 and c2 ribbons.

[lambchopsnz]

Re: Panasonic th-p42x10z

yes there is a sticker with the voltages on it. I have looked at the manual you linked above but got a little confused but will give it another go cheers. i was also hoping i didnt have to adjust anything when replacing the su and ss boards but the first service manual mentioned adjustment after ss board replacement but i was assuming i would have to get a picture or at least get the tv to stay on before any of that was possible.
Also i guess i can be doing this without having any input signal plugged in is that correct.

[tw2005]

Re: Panasonic th-p42x10z

yes there is a sticker with the voltages on it. I have looked at the manual you linked above but got a little confused but will give it another go cheers. i was also hoping i didnt have to adjust anything when replacing the su and ss boards but the first service manual mentioned adjustment after ss board replacement but i was assuming i would have to get a picture or at least get the tv to stay on before any of that was possible.
Also i guess i can be doing this without having any input signal plugged in is that correct.

I think the first thing to worry about is getting it working, adjustments worry about that if this ever fires up again.

[lambchopsnz]

Re: Panasonic th-p42x10z

I think the first thing to worry about is getting it working, adjustments worry about that if this ever fires up again.

that dosent sound to positive lol i will keep trying though

[lambchopsnz]

Re: Panasonic th-p42x10z

Hey all well I've had my 3 replacement boards checked and my original ss board and they all came back ok so now I'm going to check the VA voltage as suggested just wanting to know where exactly I check this I think it's marked on the power board so it would be positive lead to that point and negative to chassis correct.
Thanks
Nick

[tw2005]

Re: Panasonic th-p42x10z

Va on a Panasonic is known as Vda and is P35 connector. Be careful here with this if you disconnect p35 do not reconnect it if there is residual voltage as you can spike the panel ICs on the chip on film chips embedded on the panel ribbons to the C boards.

I'd leave it connected and backprobe the connector ,turn the TV on . I think 60V going on the manuals and I'd not adjust it unless the value was wrong.

[lambchopsnz]

Re: Panasonic th-p42x10z

Va on a Panasonic is known as Vda and is P35 connector. Be careful here with this if you disconnect p35 do not reconnect it if there is residual voltage as you can spike the panel ICs on the chip on film chips embedded on the panel ribbons to the C boards.

I'd leave it connected and backprobe the connector ,turn the TV on . I think 60V going on the manuals and I'd not adjust it unless the value was wrong.

Ok what do you mean by backprobe? do you mean putting the probes in the top of the plug? Which way round do the probes go? i have been told it should read 130v.
Im guessing this has to be tested before the relay clicks off again correct?

[tw2005]

Re: Panasonic th-p42x10z

Ok what do you mean by backprobe? do you mean putting the probes in the top of the plug? Which way round do the probes go? i have been told it should read 130v.
Im guessing this has to be tested before the relay clicks off again correct?

yeah probe the back of the connector or if the tips are fine enough you may get them wedged.

Who said 130V? If it's a self ranging meter should not matter as it will show either positive or neg value.

Well you called it Va, and Va on a Samsung 2007 PDP is about 63V and is supplied to the lower buffers same as c Boards in the panny.

I don't know what you're trying to measure but here are the typical values, ones that are missing are referenced to the panel sticker.

You should be using a manual to locate the test points

Vsus TPVSUS(SS) Vsus ± 2V R737(P)

Ve TPVE(SS) Ve ± 2.5V

Vset TPVSET(SC) 290V ± 9V

Vad TPVAD(SC) -180V ± 2V VR16600(SC)

Vscn TPVSCN(SC) Vad_base:+145V ± 4V, GND_base:-35V ± 6V

Vda TPVDA(P) 60V + 1V,-2V

[lambchopsnz]

Re: Panasonic th-p42x10z

Ok so I managed to test a couple of vsus points which were 187.7v before the tv shuts down again,the sticker says 187v so I'm guessing this means the power supply is working ok.
Cheers
Nick