Panasonic TC-P50C2 7 blinks

[pro_leonk]

Greetings,
I got this TV from the neighbor stating that it no longer turns on, only blinks.
I took a look at it, has a blink code of 10. Per troubleshooting guide bad SS board. Replaced SS board, now I have blink code of 7.
Troubleshooting code 7, turns out that most likely the SC and the SD/SU boards are bad as well. They fail the resistance tests, no burnt spots on the boards etc.
I can hear the relays click when its trying to start up, and get 15v on the VSUS before it shuts down again. The troubleshooting guide mentions check for bad pixels or panel damage. I can only interpreted this for obvious damage (first time dealing with a plasma TV), but I would be able to spot them...

Now my question is, is it worth to fix it? the SC boards are hard to find and run around $120 to get them repaired, or get a used set for all three boards for around $200 on ebay. The SC board was already $50. Thats $250 for a 6 year old TV, almost half a new one.
I am thinking about pulling the plug. I spent quite a few hours on it already, still can get a refund on the SS board to cut my loses, possibly part out the other good boards on here.

Suggestions?

[newtothis]

Re: Panasonic TC-P50C2 7 blinks

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

[tw2005]

Re: Panasonic TC-P50C2 7 blinks

Greetings,
I got this TV from the neighbor stating that it no longer turns on, only blinks.
I took a look at it, has a blink code of 10. Per troubleshooting guide bad SS board. Replaced SS board, now I have blink code of 7.
Troubleshooting code 7, turns out that most likely the SC and the SD/SU boards are bad as well. They fail the resistance tests, no burnt spots on the boards etc.
I can hear the relays click when its trying to start up, and get 15v on the VSUS before it shuts down again. The troubleshooting guide mentions check for bad pixels or panel damage. I can only interpreted this for obvious damage (first time dealing with a plasma TV), but I would be able to spot them...

Now my question is, is it worth to fix it? the SC boards are hard to find and run around $120 to get them repaired, or get a used set for all three boards for around $200 on ebay. The SC board was already $50. Thats $250 for a 6 year old TV, almost half a new one.
I am thinking about pulling the plug. I spent quite a few hours on it already, still can get a refund on the SS board to cut my loses, possibly part out the other good boards on here.

Suggestions?

TNPA5072 SS board failure is fairly common, were the rjp30e4 transistors shorted?

bad SS can take out the SC as they are linked

SC board repair if you get moving is $52
https://store-zt3br2s.mybigcommerce....ikjun1pfem9rq5

you say they fail resistance test but given us no data or how you have concluded this. Were the buffers isolated from the SC when you checked them?

You can get a PAIR between $20 -35 here, they're all the same.
https://www.paylesscomponents.com/ca...lt/?q=tnpa5068

I think you mean the SS board was $50

[pro_leonk]

Re: Panasonic TC-P50C2 7 blinks

Thanks for getting back tw2005, I will try to be as clear as possible.
I followed the Panasonic plasma repair guide, which stated to replace the SS board. No, I did not check if the rjp30e4 transistors were shorted. I only replaced the SS board - that is when it changed from 10 blinks to 7.

Thanks for the link for the SC board repair, however it was for the wrong board. This TV has the TNPA5105AB (TXNSC1LQUU) and not the TNPA5081 (TXNSC1LVUU) board. Repair is still $100. Do you have a coupon? I see there is a discount for plasmas...

It failed the resistance test, as far as the Panasonic troubleshooting guide goes (page 85+). It fails the test when the SC board and buffers are together, and when isolated both boards fail the specified resistance test as well.

Correct, the SS board was $50.

[tw2005]

Re: Panasonic TC-P50C2 7 blinks

Thanks for getting back tw2005, I will try to be as clear as possible.
I followed the Panasonic plasma repair guide, which stated to replace the SS board. No, I did not check if the rjp30e4 transistors were shorted. I only replaced the SS board - that is when it changed from 10 blinks to 7.

Thanks for the link for the SC board repair, however it was for the wrong board. This TV has the TNPA5105AB (TXNSC1LQUU) and not the TNPA5081 (TXNSC1LVUU) board. Repair is still $100. Do you have a coupon? I see there is a discount for plasmas...

It failed the resistance test, as far as the Panasonic troubleshooting guide goes (page 85+). It fails the test when the SC board and buffers are together, and when isolated both boards fail the specified resistance test as well.

Correct, the SS board was $50.

can you take some photos of the back of the TV with the boards and a photo of the model sticker. I just have to see this to believe it.

The 50C2 is meant to be a HD tv so should have the 5063 board.

, the 50S2 is a FHD TV and would have the TNPA5105.

Now that I actually know what we're dealing with the 10 blink may have been the SC to begin with.

you missed out on the sale by the looks of it.

[pro_leonk]

Re: Panasonic TC-P50C2 7 blinks

I do have a low quality picture of the SC board, and it is indeed the TNPA5063. I will add pictures later this evening for clarification.
I must have gotten the TNPA5105 from shopjimmy's website.

[pro_leonk]

Re: Panasonic TC-P50C2 7 blinks

picture confirmation for SC board TNPA5063
SS board: TNPA5072
SU/SD: TNPA 5068/ 5069

The sale is over, at $65 for the repair is still cheaper what I have seen online.

[tw2005]

Re: Panasonic TC-P50C2 7 blinks

yep, my bad . Was posting link for a 54" FHD and must have rushed thinking I had the correct page. The 5063 was what i meant to grab and watch out for SJ with their info as they do make mistakes.

[pro_leonk]

Re: Panasonic TC-P50C2 7 blinks

So at this time you recommend getting the SC board repaired and getting used SD and SU boards and see if it fires back up?

[tw2005]

Re: Panasonic TC-P50C2 7 blinks

So at this time you recommend getting the SC board repaired and getting used SD and SU boards and see if it fires back up?

I was not going to recommend anything in particular since you've decided they've failed the resistance test. Have you tried the Sc50 test with the buffers disconnected, earth screws removed x 4 Vfg bolts, short the 2 pins at sc50 and fire up?
If that fails and 7 blinks that would be SC but if it's failed bound to be a shorted IGBT somewhere so not too hard to have a poke and see.

Somewhat skeptical about the buffers being bad especially both but can happen.

Safest way would be get the lot as the buffers seem cheap enough anyway

7 blink is normally 1 or all of these SC,SD,SU

Can't make any promises though but that would be my move

[pro_leonk]

Re: Panasonic TC-P50C2 7 blinks

Here are the test results done by the panasonic manual.
1 st Step Resistance Test - VFG and VFO (TPSC1) (TC-P42S2)
VFG and VFO = 94k - FAIL

1 st Step Resistance Test - 5V_F and VFG (TC-P42S2) (2 of 2)
= 2.64k PASS

2nd Step - SC Resistance Test (TC-P42S2) (1 of 3)
Resistance between VFG and (VFO) TPSC1
approx 8m (peaks around 23m, then decreases) - fail

Resistance between VFG and 5V_F
2.64k - pass

pg 90
****************************
3 rd Step SM Resistance Test (TC-P42S2)

Resistance between VFG and VFO (TPSC1)
5.7M = PASS

Resistance between VFG and 5V_F
30 millon? unconsistent tests... BAD??

I used a BluePoint DSMSC683 DMM for the testing above.


Yes I did the test with the SD/SU and the SC board isolated, the SC50 jumpered and sure enough, just 7 blinks and the screen appears to be still blank.
Finding a shorted IGBT... a bit over my head. I searched on here and its checking with the DMM for resistance between ground and the other two? Do you have a link that may help me understand this a bit further.

[tw2005]

Re: Panasonic TC-P50C2 7 blinks

Here are the test results done by the panasonic manual.
1 st Step Resistance Test - VFG and VFO (TPSC1) (TC-P42S2)
VFG and VFO = 94k - FAIL

1 st Step Resistance Test - 5V_F and VFG (TC-P42S2) (2 of 2)
= 2.64k PASS

2nd Step - SC Resistance Test (TC-P42S2) (1 of 3)
Resistance between VFG and (VFO) TPSC1
approx 8m (peaks around 23m, then decreases) - fail

Resistance between VFG and 5V_F
2.64k - pass

pg 90
****************************
3 rd Step SM Resistance Test (TC-P42S2)

Resistance between VFG and VFO (TPSC1)
5.7M = PASS

Resistance between VFG and 5V_F
30 millon? unconsistent tests... BAD??

I used a BluePoint DSMSC683 DMM for the testing above.


Yes I did the test with the SD/SU and the SC board isolated, the SC50 jumpered and sure enough, just 7 blinks and the screen appears to be still blank.
Finding a shorted IGBT... a bit over my head. I searched on here and its checking with the DMM for resistance between ground and the other two? Do you have a link that may help me understand this a bit further.

From what i can see you're failing these on the basis the resistance is too high.

I would give these the benefit of the doubt and most likely good. when these go Vfo - vfg shorts and the other 2 can go substantially lower if they were bad also. If you reverse the probes that may give a better reading but I have seen this before depending on the meter very high readings reported but turnout ok.

your choice but a short will kill the SC, if very high I'd expect it will not damage anything.

[pro_leonk]

Re: Panasonic TC-P50C2 7 blinks

After redoing the resistance tests I noticed in the Panasonic manual that they specified where the positive and negative are supposed to go during testing. I did not do this at first - the readings were the same range.
When jumping the SC50 pins, the TV should have turned on and stayed on with a blank screen. Does this conclude a bad SC board?


What do you mean by:
"your choice but a short will kill the SC, if very high I'd expect it will not damage anything."

[pro_leonk]

Re: Panasonic TC-P50C2 7 blinks

Got the SC board repaired and its back in. Now the TV powers on, however, just have red lines on the screen. The SU/SD boards tested high in the resistance test, so I assume those are bad as well. Getting closer on getting this thing working again.
See attached pictures. Please note, no input devices are plugged in.

[pudgi300]

Re: Panasonic TC-P50C2 7 blinks

Hi,
Hope someone like Tom or TW can help. After a lot of repairs to this TV i now have a picture but not what i expected. Pro leonk got to the same point i did and the thread ended.

SC TNAP5063 SS TNAP5072

Started out with 10 blinks. Found SS board with shorted Q001,Q002,Q021,Q022 also replaced IC131. Checked IGBT and diodes tested fine. Turn on TV.

Now have 7 blinks. Rechecked SS components and OK. Started reading forum about these plasma and wish i never started. Did all the parts research for finding parts for SC board. Replaced Q661,Q451,D481,D451,IC771,Q701,702,IC521. Checked Q818,Q672,D701,D702 out of ctt. Checked buffers for shorts and tested OK. Put in repaird SC board with SC50 jumpered and NO blink codes. Connect buffers and turn on TV and get the picture in attachment. Not sure what the problem is. Can't see any screen cracks. Don't know if problem is the panel or just missed something in the SS or SC repair. Wanted to replace IC561,IC562 AND IC563 but don't know how they affect picture. After all these parts replaced and time i spent i hope all is not in vain.

Here is the reading when TV in running.

P2 VSUS PIN 1 =190v
p35 VDA PIN 1 =54.9V
SC2 PIN 1 =190V
TP VAD =-190.9V
TP VSCN =-43.79V
TP SC1 =42V
SS11 PIN 1 =190.7
PIN 4 =15V
SS3 PIN 3 =121.8V
PIN 5 =121.8V
TPVE =124.6V
TPSS1 =121.6V


Not having luck with upload of pics. Will get them there but they are like pro leonk posted

[tw2005]

Re: Panasonic TC-P50C2 7 blinks

Hi,
Hope someone like Tom or TW can help. After a lot of repairs to this TV i now have a picture but not what i expected. Pro leonk got to the same point i did and the thread ended.

SC TNAP5063 SS TNAP5072

Started out with 10 blinks. Found SS board with shorted Q001,Q002,Q021,Q022 also replaced IC131. Checked IGBT and diodes tested fine. Turn on TV.

Now have 7 blinks. Rechecked SS components and OK. Started reading forum about these plasma and wish i never started. Did all the parts research for finding parts for SC board. Replaced Q661,Q451,D481,D451,IC771,Q701,702,IC521. Checked Q818,Q672,D701,D702 out of ctt. Checked buffers for shorts and tested OK. Put in repaird SC board with SC50 jumpered and NO blink codes. Connect buffers and turn on TV and get the picture in attachment. Not sure what the problem is. Can't see any screen cracks. Don't know if problem is the panel or just missed something in the SS or SC repair. Wanted to replace IC561,IC562 AND IC563 but don't know how they affect picture. After all these parts replaced and time i spent i hope all is not in vain.

Here is the reading when TV in running.

P2 VSUS PIN 1 =190v
p35 VDA PIN 1 =54.9V
SC2 PIN 1 =190V
TP VAD =-190.9V
TP VSCN =-43.79V
TP SC1 =42V
SS11 PIN 1 =190.7
PIN 4 =15V
SS3 PIN 3 =121.8V
PIN 5 =121.8V
TPVE =124.6V
TPSS1 =121.6V


Not having luck with upload of pics. Will get them there but they are like pro leonk posted

there's a size limit. no bigger than 2000 x 2000. go advanced then manage attachments. going to bed though so I'll have a look later, can't pronise I'll know what's wrong, not a model I had much fun with in the 42" size and lots of dramas

[pudgi300]

Re: Panasonic TC-P50C2 7 blinks

Hope i have this resizing down. Bought this camera for Ebay sales. Didn't know about the resize for upload. I can do more pics now if anyone needs them. Hope someone can help. I saw something Tom put up that these probems are SS related. Now to the upload

[tw2005]

Re: Panasonic TC-P50C2 7 blinks

Hope i have this resizing down. Bought this camera for Ebay sales. Didn't know about the resize for upload. I can do more pics now if anyone needs them. Hope someone can help. I saw something Tom put up that these probems are SS related. Now to the upload

i would say you need to reseat some of the buffer ribbons for the lines and SS board is most likely the fault. Is everything connected on the SS, there's a small connection hidden under the a board on the ss is that connected.

maybe take the SS out and take some decent shots of the repair work so we can see just in case something is obvious.

I think the 50" SS boards are still obtainable

[flocko]

Re: Panasonic TC-P50C2 7 blinks

Be careful buying TNPA5072 SS board they come with different ribbon socket placement, but I would say that look a lot like the fault I had with a faulty driver IC on the SS Flocko

[pudgi300]

Re: Panasonic TC-P50C2 7 blinks

Day started out OK. Read TW post and reseated the buffer jumpers. Took a little work and used a litle Deoxit on them. Got all the black lines cleared up. That was great and thanks TW. Still had the snowy dim picture. This is the bad part. Before i even got to take pictures i thought i would take some reading on the SS board. I was on Q102 and POP!!! My probe went source to drain. Now back to 10 blinks again. Didn't find any shorts on SS but SC shorted Q441,Q661,Q401,Q402,Q421 and Q422. So how have to order more parts from UTsource so on hold for a while. Thanks again and will get back soon.
Thanks Pudgi300